Class / Patent application number | Description | Number of patent applications / Date published |
323281000 | With reference voltage circuitry | 71 |
20090001953 | Low dropout linear voltage regulator - The present invention discloses an LDO (Low DropOut) linear voltage regulator, which is based on an NMC (Nested Miller Compensation) architecture and can be capacitor-free, wherein an active resistor is added to the feedback path of the Miller compensation capacitor to increase the controllability of the damping factor, solve the problem of extensively using the output capacitor with a parasitic resistance, and solve the problem that a compromise must be made between the damping factor control and the system loop gain. Further, the present invention utilizes a capacitor-sharing technique to reduce the Miller capacitance required by the entire system and accelerate the stabilization of output voltage without influencing stability. | 01-01-2009 |
20090027018 | INTEGRATED CIRCUIT AND A METHOD FOR SELECTING A VOLTAGE IN AN INTEGRATED CIRCUIT - An integrated circuit comprising an adjustable voltage source to allow a plurality of voltage values to be selected; means for measuring a voltage value derived from the adjustable voltage source; and means for configuring the adjustable voltage source to provide a selected voltage value, wherein the selected voltage value is selected based upon a voltage value measured by the means for measuring and a voltage selected by a controller. | 01-29-2009 |
20090102442 | Power Supply Device for USB - A power supply adapter with USB connectors includes a housing with a plurality of USB connectors being exposed on the surface thereof, and a power supply device being provided in the housing. The power supply device is connected with an input power source and includes a load detection circuit for detecting if the USB connectors are connected with charged products, an overload protection circuit to protect the charged products from burning away due to an abnormal input voltage, an over voltage protection circuit to protect each circuit device from burning away due to a voltage too high, and a voltage level generation circuit for generating a potential difference which is afterwards introduced to the pin of the plural USB connectors during charging. The potential difference of the power source of a simulated computer host may be detected from the charged products and therefore the charged products can be smoothly charged. | 04-23-2009 |
20090128108 | CONSTANT VOLTAGE POWER SUPPLY CIRCUIT - A first output transistor forms a first current path between an input and an output terminal and has a first control terminal applied with a first control signal. A second output transistor forms a second current path between the output and a ground terminal and has a second control terminal applied with a second control signal. A first comparator outputs the first control signal to decrease an ON-resistance of the first transistor when an output voltage from the output terminal is a predetermined value or less. A second comparator outputs the second control signal to render the second transistor conductive to decrease the output voltage when the output voltage is a predetermined value or more. An acceleration circuit accelerates charging of the first control terminal of the first transistor to a predetermined potential. The inhibition circuit inhibits the acceleration circuit operation according to a change of the second control signal. | 05-21-2009 |
20100039082 | LOW DROPOUT VOLTAGE REGULATOR WITH CLAMPING - Apparatus and methods for reducing output load transients of a low dropout voltage regulator (“LDO”) are disclosed herein. A voltage regulator includes an output driver coupled to a regulator output pin, the output driver provides current to a load external to the regulator. A clamping device is coupled between the output pin and an internal node of the regulator. The clamping device forces a voltage at a control input of the output driver to follow the voltage at the output pin when the output driver is disabled. | 02-18-2010 |
20100052636 | CONSTANT-VOLTAGE CIRCUIT DEVICE - A constant-voltage circuit converts a voltage input to an input terminal and outputs a predetermined constant voltage from an output terminal. The constant-voltage circuit includes an output transistor to output an electrical current to the output terminal in response to a control signal, a reference voltage circuit to generate a predetermined reference voltage, a control circuit to adjust a voltage proportional to the output voltage output from the output terminal to the reference voltage output from the reference voltage circuit by controlling the output transistor and a soft start circuit including a capacitor for soft start that is charged at start-up and a current control unit to control an electrical current supplied to the reference voltage circuit. The current control unit adjusts the reference voltage to a voltage determined by the capacitor for soft start at the start-up until the reference voltage reaches a desired voltage. | 03-04-2010 |
20100072961 | INTERPOSER INCLUDING VOLTAGE REGULATOR AND METHOD THEREFOR - A device that includes an electronic device referred to as an integrated circuit interposer is disclosed. The integrated circuit includes a voltage regulator module. The interposer is attached to an electronic device, such as another integrated circuit, and facilitates control and distribution of power to the electronic device. The integrated circuit interposer can also conduct signaling between the attached electronic device and another electronic device. The voltage regulator module at the integrated circuit interposer can be configured to provide a voltage reference signal to the attached electronic device. Generation of the voltage reference signal by the integrated circuit interposer can be enabled or disabled and the value of the voltage reference signal can be adjusted, depending on operating requirements of the electronic device. | 03-25-2010 |
20100085024 | POWER SUPPLY CONTROLLER WITH DIFFERENT STEADY STATE AND TRANSIENT RESPONSE CHARACTERISTICS - An embodiment of a power-supply controller includes a control circuit and a detection circuit. The control circuit has a signal characteristic, and is operable in response to a regulated output signal and a reference signal to cause at least one power-supply phase to generate the regulated output signal. The detection circuit is operable to detect a change in the regulated output signal, and to alter the signal characteristic of the control circuit in response to the detected change. | 04-08-2010 |
20100090666 | METHOD FOR REGULATING SUPPLY VOLTAGE - According to the method for regulating the supply voltage Uo of an electronic circuit a regulating element with variable resistivity and the outer supply voltage Ui being applied to an input terminal of said regulating element is controlled by an amplified difference between a reference voltage and a part of a regulated supply voltage Uo, whereat at first an instant, on which the regulating circuit and the electronic circuit start operating, is detected, and then such value of the reference voltage is set on said instant that the regulated supply voltage Uo will equal a maximum allowable supply voltage of the electronic circuit and the supplied electronic circuit puts itself in a state of a maximum current consumption. Then an operating voltage drop (Ui-Uo)w across said regulating element is measured at regular time intervals and the reference voltage is then each time reduced by one degree until said operating voltage drop (Ui-Uo)w is below or equals a chosen most appropriate value (Ui-Uo)optim of said operating voltage drop. The supplied electronic circuit puts itself in a state of a normal current consumption when said operating voltage drop (Ui-Uo)w has exceeded the chosen most appropriate value (Ui-Uo)optim of said voltage drop. According to a variant embodiment the operating voltage drop (Ui-Uo)w is then uninterruptedly measured and, if its value decreases below a chosen minimum value (Ui-Uo)min of said operating voltage drop due to a disturbance in the outer supply voltage Ui, a flag is set in a memory in the case of a disturbance potentially dangerous to the electronic circuit, which flag indicates that the electronic circuit should be supplied at said operating voltage drop (Ui-Uo)w increased for one degree &Dgr;Uow after a first operating start of the regulating circuit and the electronic circuit following the flag setting in the memory. The method of the invention for regulating the supply voltage makes possible an automatic setting the supply voltage to a highest possible value, whereat, however, its quality with respect to lowering the level of disturbances is guaranteed. | 04-15-2010 |
20100164445 | Digital Linear Voltage Regulator - A digital linear voltage regulator includes a comparator, a finite state machine, and a current digital-to-analog converter (DAC). The comparator is preferably coupled to receive a reference voltage and an operating voltage supplied to a dynamic load. The comparator generates, during a clock cycle, a binary output based on a comparison between reference and operating voltages. The finite state machine (FSM) is coupled to receive at least one control signal that indicates a target operating state for the digital linear voltage regulator. The FSM receives the binary output from the comparator and generates a digital word, during a clock cycle, based on the target operating state of the digital linear voltage regulator and on the binary output. The current DAC is coupled to the FSM, receives the digital word and delivers current at the desired voltage to the dynamic load. | 07-01-2010 |
20100213908 | LOW DROPOUT REGULATORS - Low dropout regulators capable of preventing damage caused by a short circuit or a heavy load are provided, in which a pass transistor receives an unregulated power supply voltage to generate a regulated output voltage according to a control signal. Additionally, a constant overcurrent limiting circuit limits an output current through the pass transistor to below a predetermined current, and a foldback overcurrent limiting circuit enables the constant overcurrent limiting circuit to further decrease the output current, when the regulated output voltage is lower than a predetermined voltage. | 08-26-2010 |
20100253297 | Soft-Start Circuit - A soft-start circuit is provided. The soft-start circuit comprises: an input stage, a pump stage, a second resistor and a capacitor. The input stage comprises a first resistor to receive an input voltage to provide a reference current at a first node. The pump stage comprises N current branches connected in parallel each comprising a current source connected to the first node and a switch to transfer the current from the current source to the second node while the switch operates in a connecting state. The switches has 2 | 10-07-2010 |
20100289465 | TRANSIENT LOAD VOLTAGE REGULATOR - Systems and methods providing for improved voltage regulation of a supply voltage for an integrated circuit are described herein. The voltage regulator circuit includes a feedback circuit coupled to a first current path and adapted to maintain a gate voltage of a feedback transistor substantially constant. A pass device is coupled to a second current path and adapted to receive a signal with a magnitude based on first and second currents supplied by first and second current sources to the second current path. In an embodiment, the first current is a substantially constant current and the second current has a magnitude based on a magnitude of the voltage at the feedback transistor gate and a magnitude of a voltage at an output of the voltage regulator circuit coupled to the pass device. | 11-18-2010 |
20110095737 | VOLTAGE REGULATOR, AND INTEGRATED CIRCUIT USING THE SAME - A voltage regulator and an integrated circuit using the voltage regulator is provided. The voltage regulator has a bandgap reference circuit, an operational amplifier, a power transistor and a voltage divider. The bandgap reference circuit generates a bandgap reference voltage. The operational amplifier receives the bandgap reference voltage and a feedback voltage to output a control signal for the power transistor. The power transistor is powered by a first voltage source and transforms the first voltage source to a second voltage source according to the control signal. The second voltage source is divided by the voltage divider to generate the feedback voltage and is further used in powering the bandgap reference circuit and the operational amplifier. | 04-28-2011 |
20110121802 | Low dropout regulator circuit without external capacitors rapidly responding to load change - A low dropout regulator (LDO) circuit without external capacitors rapidly responding to load change includes a slow pathway and a fast pathway for controlling voltage, wherein the slow pathway for providing precise output voltage includes an operational amplifier I | 05-26-2011 |
20110234186 | HIGH VOLTAGE POWER SUPPLY - A high voltage power supply is provided. The high voltage power supply includes a soft-start circuit unit which outputs a natural voltage that decreases exponentially as time elapses and converts the natural voltage into a forced voltage having a predetermined scale if an enable signal is applied, a controller which compares the natural voltage output from the soft-start circuit unit with a reference voltage and outputs a control signal, and a converting unit which delays outputting a final voltage during a first predetermined time period and outputs the final voltage, which gradually increases as time elapses according to the control signal. | 09-29-2011 |
20110298432 | APPARATUS AND METHOD FOR VARIABLE VOLTAGE FUNCTION - Apparatus and methods for providing variable regulated voltages are disclosed. Variable voltage control elements can adjust a regulated voltage provided by a single voltage regulator, thereby providing a variable regulated voltage. The regulated voltage can be used in a variety of applications, for example, as a bias voltage for a power amplifier. | 12-08-2011 |
20120013318 | VOLTAGE DOWN CONVERTER - A voltage down converter includes a voltage comparator for comparing a first reference voltage and an internal voltage to provide a first driving signal; a driving signal controller coupled with the voltage comparator, the driving signal controller configured to generate a second driving signal in response to an external voltage and selectively providing any one of the first and second driving signals; and a voltage supply coupled with the driving signal controller, the voltage supply configured to receive the selectively provided first and second driving signals, wherein the voltage supply is activated in accordance with the first or second driving signal, thereby providing the internal voltage. | 01-19-2012 |
20120112718 | Low-Dropout Regulator - The invention proposes a low-dropout voltage regulator comprising an output terminal for providing an output voltage (V | 05-10-2012 |
20120194150 | SYSTEMS AND METHODS FOR LOW-BATTERY OPERATION CONTROL IN PORTABLE COMMUNICATION DEVICES - Systems and methods may include a low-dropout (LDO) voltage regulator for portable communication devices. The systems and methods may include a comparator having first and second inputs and generating a control voltage, the first input receiving a battery voltage from a battery source, the second input receiving a fixed voltage independent from the battery voltage, and a power management circuit that receives the control voltage and provides a regulated voltage based upon the control voltage, wherein when the received battery voltage is above the fixed voltage, the control voltage is provided at a high constant voltage, thereby resulting in the regulated voltage being at a first voltage, and wherein when the battery voltage is below the fixed voltage, the control voltage is provided at a low constant voltage, thereby resulting in the regulated voltage being at a second voltage less than the first voltage. | 08-02-2012 |
20120299564 | Low drop-out voltage regulator with dynamic voltage control - A low dropout voltage regulator circuit that dynamically adjusts its output voltage has a voltage adjustment circuit in communication with a dynamic voltage controlling circuit for modifying the output voltage of the low dropout voltage regulator. A first amplification circuit is connected to receive an adjusted reference voltage from the voltage adjustment circuit and compare it with a feedback signal from the output voltage to provide a drive signal to a signal input terminal of a follower output transistor. An output terminal of the follower output transistor provides the output voltage of the regulation circuit. An adjustable internal load circuit applies a load current to the output terminal of the follower output transistor to increase the bandwidth of the output of the voltage regulation circuit that is sensed by a dynamic biasing sensing circuit to generate a dynamic biasing signal that modifies the bandwidth of the first amplification circuit. | 11-29-2012 |
20130015828 | LOW POWER LOW-DROPOUT LINEAR VOLTAGE REGULATORAANM AMIR; EranAACI Givat AdaAACO ILAAGP AMIR; Eran Givat Ada IL - An integrated circuit, including: a low dropout regulator configured to output regulated power to a device that can be in standard mode drawing power from the regulator or in idle mode during which it substantially does not draw power from the regulator; a capacitor in parallel to the regulator's output configured to be charged when the regulator is enabled and to provide power instead of the regulator when the regulator is disabled; a control configured to disable and enable the regulator; wherein the control is configured to disable the regulator when the device is in idle mode and enable the regulator when the device is in standard mode; and wherein during idle mode the control enables the regulator at various times to prevent the charge of the capacitor from decreasing more than a pre-selected amount. | 01-17-2013 |
20130033245 | BANDGAP CIRCUIT FOR PROVIDING STABLE REFERENCE VOLTAGE - The invention provides a bandgap circuit for providing stable reference voltages. The bandgap circuit comprises a core circuit and an output branch. The core circuit comprises: a first transistor, coupled between a supplied working voltage and a first node, and having a gate coupled to the first node; a second transistor, coupled between the supplied working voltage and a second node, and having a gate coupled to the first node; a third transistor, coupled between the first node and a ground voltage, and having a gate coupled to a third node; a fourth transistor, coupled between the third node and the ground voltage, and having a gate coupled to the second node; and a first resistor, coupled between the second and third nodes. The output branch is coupled to the core circuit to receive an output of the core circuit, and arranged to output a reference voltage at an output node. | 02-07-2013 |
20130234684 | IMMEDIATE RESPONSE LOW DROPOUT REGULATION SYSTEM AND OPERATION METHOD OF A LOW DROPOUT REGULATION SYSTEM - An immediate response low dropout regulation system includes a low dropout regulation unit, a tracking voltage generation unit, and a self-driving unit. The low dropout regulation unit is used for generating and outputting an inner output voltage according to a reference voltage. The tracking voltage generation unit is used for generating and outputting a tracking voltage according to the reference voltage. The self-driving unit is coupled to the low dropout regulation unit and the tracking voltage generation unit. When a voltage difference between the tracking voltage and the inner output voltage is greater than a constant times threshold voltage, the self-driving unit provides a compensation current to an output terminal of the low dropout regulation unit. | 09-12-2013 |
20140002041 | DIGITAL LOW DROP-OUT REGULATOR | 01-02-2014 |
20140015502 | LOW DROPOUT VOLTAGE REGULATOR AND ELECTRONIC DEVICE THEREOF - A low dropout voltage regulator is provided. The low dropout voltage regulator includes a comparison unit, a buck unit, a feedback unit and a current-drawing unit. The comparison unit is used for receiving a reference voltage and a feedback voltage, and comparing the reference voltage and the feedback voltage to output a first voltage. The buck unit is used for receiving an input voltage and the first voltage and transferring the input voltage to a output voltage. The feedback unit is used for receiving the output voltage, and converting the output voltage to a feedback voltage, and then transmitting the feedback voltage to the comparison unit. The current-drawing unit determines whether to draw a portion of a first current generated by the buck unit, so as to stabilize the output voltage. | 01-16-2014 |
20140055110 | METHOD AND APPARATUS FOR OPTIMIZING LINEAR REGULATOR TRANSIENT PERFORMANCE - A voltage regulator compensation circuit provides power to a dynamic load and includes a power transistor configured to drive the dynamic load, a reference determining transistor configured to establish a voltage reference proportional to a regulated output voltage of the power transistor, and a control circuit coupled to a gate input of both the power transistor and the reference determining transistor. Also included is a comparison engine configured to compare the regulated output voltage and the voltage reference, and a current consuming transistor operatively coupled to an output of the power transistor and configured to provide a varying secondary load. The comparison engine is configured to control the current consuming transistor to increase current draw or decrease current draw from the power transistor based on the difference between the regulated output voltage and the voltage reference. | 02-27-2014 |
20140111173 | LOW DROP-OUT REGULATOR - There is provided a low drop-out regulator. The low drop-out regulator includes a reference voltage generating unit converting input power to generate a reference voltage; an amplifier comparing the reference voltage and a feedback voltage to output a gate signal; a pass transistor array unit including a first transistor and a second transistor respectively including a gate receiving the gate signal; a voltage detector detecting the feedback voltage and an output voltage by using a switching operation of the pass transistor array unit; and a controller shutting off the gate signal applied to either of the first transistor or the second transistor, according to the reference voltage and the input power. | 04-24-2014 |
20140117958 | METHOD AND APPARATUS FOR LOAD ADAPTIVE LDO BIAS AND COMPENSATION - An adaptive low dropout (LDO) regulator includes a load-based bias controller that generates a bias control signal based on the output load current, and has a differential amplifier with a bias adjustment that receives the bias control signal and responds by adjusting a bias of a transistor within the adaptive LOD regulator. Optionally, the bias control signal is generated according to a hysteresis rule. Optionally, the adaptive LOD regulator includes an adaptive load-based compensation network having a zero, the zero having a location based, at least in part, one more of an adjustable resistance or capacitance value controlled by the load-based bias controller. | 05-01-2014 |
20140125300 | METHOD AND APPARATUS REDUCED SWITCH-ON RATE LOW DROPOUT REGULATOR (LDO) BIAS AND COMPENSATION - A switchable bias current biases, in an operational state, a differential amplifier with a full-slew bias current. A system on/off signal transitions from an operational state to a power-down state. The transition disables the differential amplifier and switches the switchable bias current to a reduced slew bias current. The system on/off signal transitions from the power-down state to the operational state, the differential amplifier is enabled, and the switchable bias current is delayed, by a reduced slew duration, from switching to the full-slew bias current. The enabled differential amplifier slews toward a reference voltage at a reduced slew rate caused by the reduced slew bias current. The switchable bias current, after the reduced slew duration, switches to the full-slew bias current. Optionally, a regulated pass gate is disabled in response to the system on/off signal transitioning from the operational state to the power-down state. | 05-08-2014 |
20140125301 | CONTROL CIRCUITRY - Control circuitry for stabilising a DC voltage outputted by a DC power supply against changes in ambient temperature. The control circuitry includes: measurement circuitry configured to output a measurement voltage representative of a DC voltage outputted by a DC power supply; reference circuitry configured to output a reference voltage; and comparison circuitry configured to compare the measurement voltage with the reference voltage and, based on the comparison, output a control signal for controlling the DC voltage outputted by the DC power supply. At least one temperature-sensitive component of the control circuitry is located in an enclosure configured to maintain a substantially constant temperature within the enclosure. | 05-08-2014 |
20140145695 | STARTUP CONTROL CIRCUIT IN VOLTAGE REGULATORS AND RELATED CIRCUITS - Aspects of the present disclosure are directed towards apparatus useful for controlling low drop out linear regulators during startup. A voltage regulator device can generate a regulated output voltage from an input voltage and in response to a reference voltage that has, during a startup period, a delayed ramp up relative to a corresponding ramp up of the input voltage. An error circuit generates an error signal in response to a comparison between the output voltage and the reference voltage. An output circuit includes a power transistor that is activated in response to the error signal. A startup control circuit can override, during the startup period for the voltage regulator device, the error signal and thereby counteract activation of the power transistor. | 05-29-2014 |
20140176099 | VOLTAGE SUPPLY DEVICE - There is provided a voltage supply device, including an inputting unit obtaining a reference voltage; an operational amplifier obtaining switching information based on the reference voltage and a feedback voltage, a switching unit outputting an input voltage as the feedback voltage based on the switching information from the operational amplifier, a controlling unit obtaining a control signal based on the reference voltage, and an outputting unit outputting an output voltage and hysteresis information based on the control signal. | 06-26-2014 |
20140239929 | LOW DROPOUT REGULATOR - A low dropout regulator comprises an output transistor (MPOUT) with a controlled section coupled between a first supply terminal (VS) and an output terminal (OUT), and a differential amplifier that comprises a feedback input (VFB) coupled to the output terminal (OUT), a reference input (VR) for receiving a reference voltage, an output (DOUT) connected to a control terminal of the output transistor (MPOUT), and at least one pair of input transistors (M | 08-28-2014 |
20140247028 | LDO Regulator - The present invention concerns a low dropout (LDO) regulator of regulating an output signal, the LDO regulator comprising an input stage ( | 09-04-2014 |
20140253072 | VOLTAGE REGULATORS WITH IMPROVED STARTUP, SHUTDOWN, AND TRANSIENT BEHAVIOR - A soft-start/soft-stop (SS) controller for a voltage regulator. The SS controller includes a power up/down detector configured to perform at least one selected from a group consisting of detecting a power on condition of the voltage regulator to determine a start-up time period and detecting a power off condition of the voltage regulator to determine a shut-down time period, and a ramped reference voltage signal generator configured to perform at least one selected from a group consisting of increasing a voltage level of a ramped reference voltage signal using a pre-determined ramp-up rate during the start-up time period and decreasing the voltage level of the ramped reference voltage signal using a pre-determined ramp-down rate during the shut-down time period, wherein the ramped reference voltage signal is supplied to the voltage regulator for controlling an output voltage level of the voltage regulator. | 09-11-2014 |
20140253073 | BI-DIRECTIONAL VOLTAGE POSITIONING CIRCUIT, VOLTAGE CONVERTER AND POWER SUPPLY DEVICE INCLUDING THE SAME - A bi-directional voltage positioning circuit includes a voltage to current converter, a current mirror circuit and a switch. The voltage to current converter converts a sensing voltage to a first current, and the sensing voltage is sensed based on a current flowing through an output coil connected between a switching node and an output node. The current mirror circuit mirrors the first current to generate a second current and a third current, the second current is N times greater than the first current, the third current is M times greater than the first current, and N and M are real numbers greater than zero. The switch provides a feedback node with one of the second current and third current in response to a switching control signal, and an output voltage of the output node is divided at the feedback node. | 09-11-2014 |
20140347023 | SEMICONDUCTOR INTEGRATED CIRCUIT - A reference power supply is built into a semiconductor integrated circuit, receives an input voltage V | 11-27-2014 |
20140354252 | Apparatus Providing an Output Voltage - Apparatuses and methods are provided where a predefined voltage may be applied in a feedback circuit of a voltage regulator, the feedback circuit coupling and output terminal with an adjust terminal of the voltage regulator. | 12-04-2014 |
20150042301 | VOLTAGE REGULATORS - An embodiment of an arrangement includes a voltage regulator configured to provide an output voltage, said voltage regulator configured to receive one of a plurality of different regulator reference voltages and a controller configured to provide a selection signal, said selection signal being used to control which of said regulator reference voltages said voltage regulator receives. | 02-12-2015 |
20150077077 | VOLTAGE GENERATING APPARATUS - A voltage generating apparatus according to an embodiment of the present invention includes a voltage regulator determining a pass voltage at a pass node by comparing an output voltage at an output node with a reference voltage, and generating the output voltage by transferring an external power supply voltage to the output node in response to the pass voltage at the pass node, and a voltage stabilizer controlling a first current flowing from the pass node and a second current flowing from the output node in response to the output voltage. | 03-19-2015 |
20150084610 | Low-Noise High Efficiency Bias Generation Circuits and Method - Embodiments of signal bias generators and regulators are described generally herein. Other embodiments may be described and claimed. | 03-26-2015 |
20150091542 | REGULATOR CIRCUIT - There is provided a regulator circuit capable of increasing the capacity of the output transistor for supplying current, stably generating an internal power supply voltage and adapting to the reduction of a power supply voltage. The regulator circuit includes an output transistor which is supplied with an external power supply voltage and supplies dropped voltage to an internal circuit, a differential amplifier for outputting a gate potential applied to the gate of the output transistor, a reference voltage generating circuit for supplying a reference voltage to the differential amplifier, and a cut-off transistor for turning off the output transistor to stop supplying power to the internal circuit. The output transistor is comprised of a depression NMOS transistor whose threshold voltage is a negative voltage. The regulator circuit further includes substrate potential control means for controlling the substrate potential of the depression NMOS transistor. | 04-02-2015 |
20150097541 | Apparatus and Method for a Voltage Regulator with Improved Output Voltage Regulated Loop Biasing - An apparatus and method for a linear voltage regulator with improved voltage regulation is disclosed. A linear voltage regulator device with improved voltage regulation that combines good resiliency to noisy ground reference, high Power Supply Rejection Ratio (PSRR), good current load regulation with changes in the current load and good feedback loop stability. The linear voltage regulator comprises of an amplifier, a current source, a pass gate, a current load, a first feedback loop, a second feedback loop, a second amplifier and second pass gate. A second feedback loop is formed to control the bias of the first feedback loop. | 04-09-2015 |
20150102791 | VOLTAGE REGULATOR CALIBRATION - The present disclosure describes a circuit for managing power and heat. The circuit includes a voltage regulator, and a calibration module comprising logic, at least partially comprising hardware logic. The calibration module is configured to identify a first voltage of the circuit when a current is not provided to the voltage regulator, and determine a second voltage of the circuit when a current is provided to the voltage regulator during a reset sequence. The calibration module is further configured to compare the first voltage to the second voltage. | 04-16-2015 |
20150123635 | VOLTAGE REGULATOR APPARATUS WITH SENSING MODULES AND RELATED OPERATING METHOD THEREOF - A voltage regulator apparatus and an associated method are provided, where the voltage regulator apparatus includes: a voltage regulator module for regulating an input voltage according to a bandgap reference voltage to generate an output voltage; and a plurality of sensing modules. Ina situation where the output voltage abruptly decreases, a sensing module reduces, based on a variation amount of the output voltage, a decrement of the output voltage. In a situation where the output voltage abruptly increases, another sensing module reduces, based on another variation amount of the output voltage, an increment of the output voltage. In addition, yet another sensing module senses variation of the output voltage, converts the variation of the output voltage into a current signal, and applies the current signal to a control terminal within the voltage regulator module to indirectly control the output voltage. | 05-07-2015 |
20150130435 | TIMING CONTROLLED AC TO DC CONVERTER AND METHOD - A timing controlled converter and method for converting a time varying input signal to a regulated DC output voltage for application to a load circuit. A feedback loop is employed as a control means for switchably coupling the time varying input signal to the load circuit for controlled periods of time in a manner so as to provide an average load voltage equal to a reference voltage. The duration of the controlled periods of time is a function of: the difference between the time varying input signal and the output voltage; and the integral of the difference between the output voltage and the reference voltage. | 05-14-2015 |
20150293545 | SWITCH CONTROL CIRCUIT AND CONVERTER USING THE SAME - A switch control circuit for controlling an average current flowing into a load through a current control switch that is series-coupled to an input power and the load includes a sensing unit configured to measure a current flowing into the load, a folder unit configured to fold a sensing signal related to the measured current based on a first reference voltage to generate first and second folder output signals based on an initialization voltage, the first and second folder output signals being symmetric to each other, a comparison unit configured to compare the generated first and second folder output signals and a control unit configured to control an operation of the current control switch according to a comparison result in the comparison unit. Such a switch control circuit integrates and compares a sensing signal and a reference signal to effectively perform an average current control. | 10-15-2015 |
20150338862 | DC-DC CONVERTER - A DC/DC converter includes n converters connected in parallel to each other and configured to adjust a level of an input voltage according to a duty ratio of a first pulse signal applied to a first switch device to output an output voltage, wherein the n is an integer of 2 or more; and a control unit configured to compare an average of n sensing currents with the n sensing currents sensed from the converters, respectively, to adjust the duty ratio of the first pulse signal. | 11-26-2015 |
20150346747 | OFF SIGNAL GENERATOR AND POWER CONVETER INCLUDING THE SAME - An off signal generator may be capable of supplying a uniform current. The off signal generator may comprise an off signal generation unit outputting an off signal in response to a first signal and blocking the off signal from being output in response to a second signal, and a signal control unit generating the second signal at a preset time interval and transferring the generated second signal to the off signal generation unit. | 12-03-2015 |
20150355654 | DC-TO-DC CONVERTER - According to an embodiment, a direct current to direct current (DC-to-DC) converter includes a power stage, a generating circuit, a voltage dividing circuit, a subtractor and a controller. The power stage converts an input voltage to a first output voltage. The generating circuit generates a reference voltage by selecting one of candidate voltages in accordance with a level of the first output voltage. The voltage dividing circuit divides the first output voltage to obtain a second output voltage. The subtractor calculates a differential voltage between the reference voltage and the second output voltage. The control circuit generates a control signal to control the level of the first output voltage based on the differential voltage. | 12-10-2015 |
20150362937 | CONSTANT ON-TIME OR CONSTANT OFF-TIME SWITCHING POWER CONVERTER AND CONTROL CIRCUIT THEREOF - A constant ON-time or constant OFF-time switching power converter includes a control circuit for controlling a power switch. The control circuit includes: a constant ON-time or constant OFF-time calculation circuit, for calculating a constant ON-time or constant OFF-time; a logic circuit having inputs for receiving an output of the constant ON-time or constant OFF-time calculation circuit and a clock signal, respectively, wherein the clock signal has a frequency which is the desired fixed frequency; and a flip-flop for generating an output signal according to a set input and a reset input, wherein one of the set input and the reset input receives an output of the logic circuit, and the other one of the set input and the reset input receives a trigger signal which determines a start time of the ON-time or OFF-time. | 12-17-2015 |
20150365097 | TRANSITION TIMING CONTROL FOR SWITCHING DC/DC CONVERTER - A device is configured to control a transition timing of a switching DC/DC converter for providing power to a load device. The load device has a first operational phase that is sensitive to external noise and a second operational phase that is immune to the external noise. The device includes an input terminal coupled to an external device to receive a start signal of the first operational phase for the load device. The device also includes control circuitry configured to, responsive to the start signal, control a transition frequency of the DC/DC converter to avoid transitioning an output of the switching DC/DC converter during the first operational phase. | 12-17-2015 |
20150378374 | PROGRAMMABLE SUPPLY DOMAIN PULLDOWN - A power gated electronic device that includes a power supply domain coupled to a power gate switch, a comparator, and control logic. The power supply domain is configured to receive voltage from a power supply. The comparator is configured to receive voltage from the power supply domain and compare the voltage from the power supply domain with a threshold level. The control logic is configured to receive the output of the comparator and, based on the comparison between the voltage from the power supply domain and the threshold level, cause the power supply domain to pulldown. | 12-31-2015 |
20150378377 | ROBUST SINK / SOURCE OUTPUT STAGE AND CONTROL CIRCUIT - Multi-stage amplifiers, such as linear regulators, configured to provide a constant output voltage subject to load transients, are described. The multi-stage amplifier comprises a first amplification stage which activates or deactivates a first output stage in response to an input voltage at an input node. The first output stage is configured to source a current at an output node of the multi-stage amplifier from a high potential, when activated. Furthermore, the multi-stage amplifier comprises a second amplification stage configured to activate or to deactivate a second output stage in response to the input voltage at the input node. The second output stage is configured to sink a current at the output node of the multi-stage amplifier to a low potential, when activated. The first amplification stage and the second amplification stage are configured to activate the first output stage and the second output stage in a mutually exclusive manner. | 12-31-2015 |
20160011615 | CURRENT SOURCE FOR VOLTAGE REGULATOR AND VOLTAGE REGULATOR THEREOF | 01-14-2016 |
20160026196 | VOLTAGE REGULATOR FOR SYSTEMS WITH A HIGH DYNAMIC CURRENT RANGE - A voltage regulator includes a reference current scaling circuit comprising an input reference current, a scaled output source current and a corresponding first bias voltage, and a scaled output sink current and a corresponding second bias voltage; and a decision making circuit having a first voltage input for receiving a first reference voltage, a second voltage input for receiving a second reference voltage, a third voltage input for receiving the first bias voltage, and a fourth voltage input for receiving the second bias voltage, and an output for providing a regulated voltage. | 01-28-2016 |
20160026197 | POWER SUPPLY CIRCUIT - According to one embodiment, a power supply circuit includes a load switch, a switching control unit, a first control unit, and a second control unit. The load switch is connected to a power supply and switches between an ON state connecting the power supply to a load and an OFF state disconnecting the power supply from the load. The switching control unit outputs a first signal for controlling switching of the load switch between the ON and OFF states. The first control unit increases an output voltage of the load switch in a steady manner over a predetermined period of time when the load switch is switched to the ON state in response to the first signal. The second control unit causes a charging current to flow to the load switch after the first signal is output from the switching control unit. | 01-28-2016 |
20160033982 | DC-DC CONVERTING CIRCUIT AND A POWER MANAGEMENT CHIP PACKAGE INCLUDING THE SAME - A direct current (DC)-DC converting circuit includes a voltage converter generating a regulation current in response to a driving signal and generating an output voltage and an output current; an output voltage regulator regulating the output voltage and outputting a first control signal; a voltage limiter limiting a voltage value of the first control signal below a threshold value; a current sensor sensing an intensity of the regulation current and generating a second control signal having a voltage value corresponding to a value of the sensed intensity; and a driving signal generator generating the driving signal based on the first and second control signals, the first control signal having the voltage value below the threshold value. | 02-04-2016 |
20160070279 | MONITORING CURRENT IN POWER SWITCH DEVICES - In one example, a method includes generating, by a main switching element of a device, a load current; generating, by a regulation loop of the device, a sense current proportional to the load current; directly converting, by an analog-to-digital converter (ADC) of the device, the sense current into a digital sense current value; and outputting, by the device and to an external device, a digital representation of the load current based on the digital sense current value. | 03-10-2016 |
20160085250 | Linear Regulator with Improved Power Supply Ripple Rejection - Embodiments of the invention are generally directed to a linear regulator with improved power supply ripple rejection. An embodiment of an apparatus includes an linear regulator to receive a system power supply and to generate a regulated power supply; a first voltage reference generator to generate a first voltage reference for the linear regulator; a second voltage reference generator to generate a second voltage reference for the linear regulator; and a voltage reference and power switcher. In some embodiments, the voltage reference and power switcher is to switch a voltage reference for the linear regulator from the first voltage reference to the second voltage reference and is to switch a part of a power supply for the linear regulator from the system power supply to the regulated power supply. | 03-24-2016 |
20160109893 | APPARATUS AND METHOD FOR CONTROLLING A POWER SUPPLY - Apparatuses and methods for controlling a power supply are provided. First power supply selecting circuit selects a higher voltage from USBIN and ACIN to be first output voltage; first LDO decreases the first output voltage to second output voltage, and closes self-start circuit after receiving reference voltage; second power supply selecting circuit selects a higher voltage from second output voltage and VBAT to be third output voltage; second LDO supplies the third output voltage as the first input voltage to reference circuit; reference circuit outputs the reference voltage according to first input voltage; second LDO closes self-start circuit after receiving the reference voltage; voltage detecting circuit supplies an enable signal to second LDO when determining that USBIN or ACIN reaches a threshold voltage according to the reference voltage; and second LDO provides the first input voltage to reference circuit after receiving the enable signal. | 04-21-2016 |
20160116926 | INTEGRATED CIRCUIT - An integrated circuit may include a receiver suitable for comparing voltage levels of an external signal and a reference voltage with each other, and generating an internal signal, an adjustment code generation unit suitable for detecting a duty of the internal signal and generating an adjustment code of one or more bits, and a voltage adjustment unit suitable for adjusting the voltage level of the reference voltage in response to the adjustment code. | 04-28-2016 |
20160154414 | INRUSH CURRENT SUPPRESSION CIRCUIT AND METHOD FOR CONTROLLING WHEN A LOAD MAY BE FULLY ENERGIZED | 06-02-2016 |
20160170423 | SYSTEMS AND METHODS FOR ULTRA-PRECISION REGULATED VOLTAGE | 06-16-2016 |
20160170424 | DC-DC CONVERTER DEVICE AND SUB DC-DC CONVERTER OF PARALLEL STRUCTURE INCLUDED THEREIN | 06-16-2016 |
20160179114 | Low-Noise High Efficiency Bias Generation Circuits and Method | 06-23-2016 |
20160187900 | VOLTAGE REGULATOR CIRCUIT AND METHOD FOR LIMITING INRUSH CURRENT - A voltage regulator circuit with two series connected resistors connected together at a common resistor node. An initial conducting path has a first pass transistor with a first terminal connected to a first supply rail and a second terminal connected to a regulated output voltage. A main conducting path has a second pass transistor with a first terminal connected to the first supply rail and a second terminal connected to the regulated output voltage. A comparator has an input connected to the common resistor node output is connected to a gate of the first pass transistor. A voltage threshold switch is connected to the common resistor node, and based on the voltage at the common resistor node the voltage threshold switch selectively connects a gate of the second pass transistor to the comparator output. | 06-30-2016 |
20160252917 | APPARATUS AND METHODS FOR GENERATING A VARIABLE REGULATED VOLTAGE | 09-01-2016 |
20160252918 | PULSED FEEDBACK SWITCHING CONVERTER | 09-01-2016 |
20190146533 | LINEAR VOLTAGE REGULATOR FOR LOW-POWER DIGITAL CIRCUIT OF CHIP | 05-16-2019 |