Patent application number | Description | Published |
20090015225 | METHOD FOR REGULATING A VOLTAGE AND CIRCUIT THEREFOR - A voltage regulator ( | 01-15-2009 |
20090027087 | LOW POWER VOLTAGE DETECTION CIRCUIT AND METHOD THEREFOR - In one embodiment, a low power voltage detection circuit includes a first voltage detection device that receives power from an input voltage and a second voltage detection device receives power from an output of the low power voltage detection circuit. | 01-29-2009 |
20090167365 | METHOD FOR REGULATING A VOLTAGE AND CIRCUIT THEREFOR - A regulator circuit and a method for regulating an output voltage. The regulator circuit includes an undervoltage protection stage capable of operating in a plurality of operating modes. In one mode, the undervoltage protection stage compensates for a low undervoltage appearing in the output voltage and in another mode it compensates for a large undervoltage appearing in the output voltage. When the output voltage has a low undervoltage, a portion of the current from a current source is routed to a feedback network to balance the input voltages of the undervoltage protection stage and to place the voltage regulator in a steady state operating mode. When the output voltage has a large undervoltage, the undervoltage protection stage turns on a current sourcing transistor that cooperates with the current from the current source to quickly charge a compensation capacitor and increase the power appearing at the output of the voltage regulator. | 07-02-2009 |
20090189573 | METHOD FOR REGULATING A VOLTAGE AND CIRCUIT THEREFOR - A voltage regulator having an overload protection circuit and a method for protecting against an output voltage being less than a predetermined level. The voltage regulator has an overload protection circuit coupled between a feedback network and a regulation section. A power factor correction circuit is connected to the regulation section. An output voltage from the power factor correction circuit is fed back to the feedback network, which transmits a portion of the output voltage to the overload protection circuit. If the output voltage is less than the predetermined voltage level, a transconductance amplifier generates a current that sets an overload flag. Setting the overload flag initiates a delay timer. If the delay exceeds a predetermined amount of time, the overload protection circuit shuts down the voltage regulator. | 07-30-2009 |
20110006745 | METHOD FOR REGULATING AN OUTPUT VOLTAGE - A method for regulating the output voltage of a power supply. A boost PWM switching converter adjusts the gate drive signals to a switching transistor and a pass transistor so that the power supply has an operating frequency, Fs, based on a comparison between a parameter and a reference. The parameter may be a ratio of an input voltage to an output voltage, a difference between the output voltage and the input voltage, or the value of an input voltage. In accordance with the comparison between the parameter and the reference, the switching control circuit linearly decreases the operating frequency of the power supply. By changing the operating frequency, the output and input voltages of the power regulator may be almost equal to each other when operating with a control signal having a low duty cycle while maintaining a low output voltage ripple and a low inductor current ripple. | 01-13-2011 |
20110110124 | METHOD OF FORMING A SWITCHING REGULATOR AND STRUCTURE THEREFOR - In one embodiment, a power supply controller is configured to receive a sense signal (CS) having a negative value that is proportional to the input voltage. The power supply controller uses the sense signal to limit the switch ( | 05-12-2011 |
20110182088 | QUASI-RESONANT POWER SUPPLY CONTROLLER AND METHOD THEREFOR - In one embodiment, a quasi-resonant power supply controller is configured to select particular valley values of a switch voltage to determine a time to enable a power switch. The valleys values are selected responsively to a range of values of a feedback signal. | 07-28-2011 |
20130272034 | METHOD OF FORMING A LOW POWER DISSIPATION REGULATOR AND STRUCTURE THEREFOR - In one embodiment, a method of forming a conditioning circuit includes configuring an output biasing network to provide a biasing voltage to an MOS transistor to enable the MOS transistor to operate in a saturated operating mode for input voltages that are less than a threshold voltage. | 10-17-2013 |