Semiconductor circuit and switching power supply apparatus

Details Semiconductor circuit and switching power supply apparatus Semiconductor circuit and switching power supply apparatus

2011-06-28

2011-06-28

Riley, Shawn (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S272000

Reexamination Certificate

active

07969129

ABSTRACT:
To provide a power supply apparatus which realizes a high-speed response, a stable operation, and a low output ripple with low power consumption. The first stage switching regulator receives an input voltage and forms a first voltage. The second stage switching regulator receives the first voltage and forms a second voltage. The second stage switching regulator includes an N-phase (N is two or more) switching regulator, and the first voltage is set to be N times a target value of the second voltage. The input voltage is set to be higher than the first voltage.

REFERENCES:
patent: 6784644 (2004-08-01), Xu et al.
patent: 7071660 (2006-07-01), Xu et al.
patent: 7173400 (2007-02-01), Morioka
patent: 2005-168106 (2005-06-01), None

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