Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2009-04-06
2011-12-13
Behm, Harry (Department: 2838)
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
Reexamination Certificate
active
08076917
ABSTRACT:
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.
REFERENCES:
patent: 7583138 (2009-09-01), DeStasi et al.
patent: 2007/0046273 (2007-03-01), Riehl
Chan Wei-How
Feng Chieh-Min
Huang Jian-Rong
Tseng Kuo-Lung
Behm Harry
Richtek Technology Corporation
Tung & Associates
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