Richtek Technology Corporation

Richtek Technology Corporation, R.o.c

Chieh-Min Feng

Jian-Rong Huang

Kuo-Lung Tseng

Ting-Hung Wang

Wei-How Chan

Chung-Sheng Cheng

Chien-Hui Wang

A switching regulator includes: a phase number signal generator circuit which includes: a current sensing signal differentiator circuit for performing differentiation on a current sensing signal to generate a current differentiation signal; a current sense signal filter circuit for filtering the current sense signal to generate a filtered current signal according to the current differentiation signal; and a phase number decision circuit for deciding a phase number signal according to the filtered current signal; and an AQR signal generator circuit which includes: a voltage sensing signal differentiator circuit for performing differentiation on a voltage sensing signal to generate a voltage differentiation signal; and plural comparator circuits for comparing the voltage differentiation signal with plural AQR threshold signals to generate plural AQR comparison signals, so as to generate an AQR signal to control an operation signal generator circuit to perform an adaptive quick response procedure.

Switching regulator and control circuit thereof and quick response method

The present invention discloses a voltage regulator, and a control circuit and a control method therefor. The method for controlling a voltage regulator comprises: receiving a dynamic voltage identification signal which instructs the voltage regulator to change its output voltage to a target voltage, and generating a compensation signal to shorten an interval for the output voltage of the voltage regulator to reach the target voltage.

Adjustable voltage regulator with dynamic voltage compensation

A quick response mechanism for a switching power system includes a detector and an adjustor connected to the detector. The detector is configured to directly monitor the drop of the output voltage of the switching power system so that a quick response could be immediately triggered when a load transient occurs. The adjustor is configured to adjust the duration of the quick response, thereby preventing the output voltage from undershoot or ringback.

Quick response mechanism and method for a switching power system

The present invention discloses a buck switching regulator with improved mode transition, and a method for controlling a buck switching regulator. The method comprises: providing a switching regulator including: an output power stage for converting an input voltage to an output voltage, the output power stage being controlled by a first PWM signal during a fixed-frequency PWM mode (FPWM mode), and being controlled by a first voltage signal during a pulse skipping mode (PSK mode), wherein the first PWM signal is generated according to the first voltage signal; and in a transition from the PSK mode to the FPWM mode, proving a second voltage signal as a starting point of the first voltage signal, the second voltage signal being substantially close to a target of the first voltage signal in the FPWM mode.

Buck switching regulator with improved mode transition and control method thereof

The present invention discloses a switching regulator eliminating beat oscillation, comprising: a first transistor, a second transistor, and an inductor connected to a common node, wherein the first and second transistors operate to convert an input voltage to an output voltage; a comparator comparing a voltage signal with a saw tooth wave to generate a control signal controlling at least one of the first and second transistors; a feedback loop obtaining a feedback signal from the output voltage and generating the voltage signal according to the feedback signal; and an inductorless filter circuit located in the feedback loop for filtering a predetermined frequency band.

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Zhubei, Taiwan

Chieh-Min Feng