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7071665 |
Method of reducing a ripple of a heavy loading pulse frequency modulated voltage regulator
In a pulse frequency modulated (PFM) voltage regulator, a PFM switching signal is provided for converting a DC voltage source to an output voltage. The output voltage is detected. When the output...
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7068020 |
Step-down DC—DC converter
An N-channel MOS transistor is used to configure a DC—DC converter having good characteristics without providing a particular voltage circuit which outputs a voltage higher than an input voltage....
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7064531 |
PWM buck regulator with LDO standby mode
A voltage regulator is disclosed having a PWM portion and an LDO portion on a single chip. The PWM portion switches a large MOS transistor (or synchronous MOS transistors) at a high frequency to...
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7064530 |
Voltage regulator current sensing
A system may include a voltage regulator converter to generate a supply voltage, the voltage regulator converter comprising a high side power transistor to generate a high side alternating current...
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7064533 |
Efficiency improved voltage converter
A voltage converter improves the efficiency thereof by connecting a boost converter and an LDO regulator with a buck converter in parallel. The boost converter boosts up a supply voltage to...
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7057380 |
Adaptive dead-time controller
An adaptive dead-time controller is provided to improve a conversion efficiency of a power converter at a low/no load condition. The adaptive dead-time controller has a reference voltage generator,...
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7057381 |
Power supply controller and method
In one embodiment, a power supply controller is configured to amplify a feedback signal and a voltage reference signal by gains that are substantially constant over an operating frequency of the...
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7049800 |
Switching mode voltage regulator and method thereof
A switching mode voltage regulator comprises a pulse width modulator and an adjustable one-shot circuit to generate an adjustable signal based on an input voltage, an adjustable voltage, and a PWM...
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7049799 |
Voltage regulator and electronic device
A voltage regulator has a reference voltage circuit, a voltage source, an output terminal from which an output voltage is outputted in accordance with a voltage of the voltage source, and a voltage...
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7049879 |
Power supply circuit with control of rise characteristics of output voltage
In a power supply circuit, a main transistor, which transmits power from an input terminal to an output terminal, is controlled so that a detected voltage from an input voltage is consistent with a...
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7049798 |
System and method for communicating with a voltage regulator
A system and method is provided for using a point-on-load (“POL”) control unit to program and/or monitor a POL regulator. Specifically, in one embodiment of the present invention, a power...
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7046528 |
Load-dependent variable frequency voltage regulator
A pulse width modulation voltage regulator comprises a pulse width modulation circuit and a control circuit. The control circuit is operable to reduce a pulse modulation frequency of the pulse...
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7038436 |
Switching type dc-dc converter for generating a constant output voltage
An inventive switching type dc-dc converter is adapted to set a protective reference current level lower for a decreased output voltage, and stop the switching control signal supplied to a...
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7038434 |
Voltage regulator
A low dropout voltage regulator comprising a series-regulating element (T 1 ) between an input (I) and an output (O) of the voltage regulator, and a differential input error amplifier ( 1 ) having...
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7038435 |
Method for input current regulation and active-power filter with input voltage feedforward and output load feedforward
An active-power filter includes control circuitry to combine an integrated output-voltage feedback signal, an input-voltage sense signal and an output-load feedforward signal to generate a control...
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7030596 |
Methods and circuits for programmable automatic burst mode control using average output current
The present invention comprises a user-programmable control circuit for use in a power converter to automatically transition the converter into BURST mode when load current demand is low. The...
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7028194 |
Method and apparatus for activating a bleed circuit through logic in response to a back-driven voltage on a supply voltage plane
A technique usable with a computer includes in response to the computer being in a predetermined sleep state, coupling a load to conduct current from a supply voltage plane of the computer to...
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7026796 |
Booster circuit and method for controlling the same
A booster circuit is equipped with booster control section that detects a power supply voltage and an actual booster voltage. The booster control section sets a target booster voltage. The booster...
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7023190 |
ADC transfer function providing improved dynamic regulation in a switched mode power supply
A power supply comprises at least one power switch adapted to convey power between input and output terminals of the power supply, and a digital controller adapted to control operation of the at...
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7023191 |
Voltage regulator with adjustable output impedance
The invention relates to a voltage regulator having an output terminal (AK) for the provision of an output voltage and connection of a load, an output capacitor ( 20 ) connected to the output...
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7023188 |
Method of forming a multi-phase power supply controller
In one embodiment, a power supply controller has a plurality of PWM control channels. The PWM control signals of the PWM control channels are selectively alternated among the outputs of the power...
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7019501 |
DC/DC converter
A DC/DC converter enabling an increase in frequency. The DC/DC converter includes a main transistor, a synchronization transistor, a control circuit, which controls the main transistor and the...
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7019502 |
Synchronization of multiphase synthetic ripple voltage regulator
A multiphase synthetic ripple voltage generator for a multiphase DC-DC regulator including a master clock circuit that generates a master clock signal, sequence logic and a ripple regulator for...
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7019503 |
Active power filter with input voltage feedforward, output load feedforward, and output voltage feedforward
Active power filters and methods control and regulate the input current drawn from an electric power bus to a DC level. Load current fluctuations and ripple current reflected back to the electric...
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7012411 |
Switching regulator control circuit, switching regulator and switching regulator control method
Provides a switching regulator control circuit, a switching regulator and a switching regulator control method for achieving low current consumption and quick response at normal operating time. A...
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7009367 |
Step-up/down switching regulator control circuit and step-up/down switching regulator
To provide a step-up/down switching regulator control circuit and the step-up/down switching regulator which are stable in a wide output voltage range from step-up to step-down. According to the...
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7005834 |
Synchronous rectifier circuit and power supply
In a power supply of a synchronous rectification type, the self-turn on phenomenon of MOSFET is suppressed without increase of the drive loss to thereby improve the power efficiency. In a...
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7005835 |
Method and apparatus for load sharing in a multiphase switching power converter
A plurality of single-phase synchronizing converter automatically synchronize on a peer-to-peer basis. Each synchronizing converter is configured as a DC-to-DC converter. The synchronizing...
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7006362 |
DC/DC converter
An auxiliary resonance type DC/DC converter which is compact, inexpensive and highly efficient is provided. In a step-down type DC/DC converter 15 , comprising two main switches 1 and 2 ...
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7002326 |
Method of modulating current regulation control loop's current magnitude from a second control signal
The present invention provides current regulation. The circuit includes a current regulation loop that includes a second control signal that is used to adjust the magnitude of the regulated...
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7002324 |
Switching power supply control circuit and switching power supply using same
This invention provides a switching power supply control circuit based on the parallel operation scheme that suppresses ripples in the output voltage. The control circuit comprises switching...
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7002329 |
Voltage regulator using two operational amplifiers in current consumption
A voltage regulator, which generates and outputs a given voltage based on a preset reference voltage, includes: a detection circuit part detecting the output voltage and generating and outputting a...
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6998826 |
Voltage regulator
To provide a voltage regulator that operates even when an input power source voltage and an output voltage are small, that is, even when the difference between input and output voltages is small....
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6996389 |
Power supply for a satellite receiver
A power supply for a satellite receiver system includes a dual input supply voltage arrangement. When a higher output voltage is selected, a source of a lower supply input voltage is coupled to an...
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6995483 |
Synchronous buck and boost regulator power reduction circuit using high side sensing
A synchronous DC-DC regulator, adapted to receive a high side pulsed signal and a low side pulsed signal that is substantially the inverse of the high side pulsed signal. The regulator includes an...
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6984966 |
Switching power supply
A switching power supply; wherein a voltage detector is provided at the output of a power supply circuit and connected to the negative input of an error amplifier to amplify the error between...
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6984967 |
Multi-mode switching regulator
A multi-mode switching regulator is capable of operating in a buck mode of operation, a boost mode of operation, and a buck-boost mode of operation. In the buck-boost mode of operation, the output...
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6984968 |
Switching power supply apparatus for outputting variable voltage
A switching power supply apparatus that includes a pulse generating unit that sets a frequency of a pulse width modulation signal using capacitance applied to a capacitance input terminal, a...
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6982548 |
Switched mode power supply with delay-compensated current mode control
The invention relates to a switched mode power supply with current mode control, in which an inductive element ( 7 ) is connected to a power source ( 5 ) by means of a controllable switch ( 9 )....
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6979986 |
Switch shunt regulator and power supply arrangement using same for spacecraft applications
A Sequential Shunt Switching Regulation cell [S 3 R] adapted to connect a power source, such as a solar array panel (SAi), to a users bus (Vbus) under control of a signal (INCTRi). The cell (S 3 R)...
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6978386 |
Method and apparatus for regulating current for programmable logic controllers
A method for reducing thermal dissipation in a single PLC package includes implementing a pulse width modulated current regulator including a field effect transistor (FET) switch, and utilizing a...
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6977828 |
DC-DC converter applied to semiconductor device
An oscillator produces a signal. A voltage generating circuit is responsive to the output signal of the oscillator to generate a second voltage different from a first voltage. A voltage detecting...
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6977491 |
Current limiting voltage regulation circuit
A current limiting circuit. The current limiting circuit includes a device coupled to an output node of the current limiting circuit. The device is responsive to magnitude of a signal at the output...
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6972548 |
Pulse frequency modulated voltage regulator capable of prolonging a minimum off-time
In a pulse frequency modulated (PFM) voltage regulator, a PFM switching controller is provided to generate a PFM switching signal for converting a DC voltage source to an output voltage. A minimum...
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6969979 |
Multiple mode switching regulator having an automatic sensor circuit for power reduction
A switching regulator having a control circuit that automatically senses when a low power mode should be initiated without the use of expensive external components nor an extensive amount of...
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6969978 |
DC-DC converter with reduced electromagnetic interference
A DC-DC converter includes a variable frequency oscillator, a control system and a power train. The DC-DC converter is well suited for use in a cell phone. The control system uses the output of the...
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6967851 |
Apparatus for reducing the power consumption of a PFC-PWM power converter
An apparatus for reducing the power consumption of a PFC-PWM power converter is described. The apparatus includes a control terminal used to detect a line-input voltage and to control a PFC signal...
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6967471 |
Switching mode regular for SFP ethernet adaptor
Switching node regulator for sfp ethernet adaptor. A method is disclosed for regulating voltage on an integrated circuit formed on a substrate to power circuitry on the substrate. An unregulated...
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6965219 |
Method and apparatus for auto-interleaving synchronization in a multiphase switching power converter
A plurality of single-phase synchronizing converter automatically synchronize on a peer-to-peer basis. Each synchronizing converter is configured as a DC-to-DC converter. The synchronizing...
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6960903 |
Trouble determining apparatus for DC boosting circuit
A trouble determining apparatus for a chopper type DC boosting circuit capable of determining whether or not a switching device is in trouble securely and quickly and when the switching circuit is...
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