Multi-function voltage regulator

Details Multi-function voltage regulator Multi-function voltage regulator

2007-07-30

2008-12-16

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S274000, C323S275000, C323S284000

Reexamination Certificate

active

07466117

ABSTRACT:
A multi-function voltage regulator for both DCDC function and LDO function includes a first transistor, a second transistor and a voltage control unit. The first transistor has a first terminal and a second terminal respectively connected to a first node and a second node. The second transistor has a first terminal and a second terminal respectively connected to the first node and a third node (voltage output node). The voltage control unit has a first output terminal and a second output terminal for respectively controlling actions of the first transistor and the second transistor so that an output voltage of the third node is a default voltage. The voltage control unit further has a first input terminal, a second input terminal and a ground terminal respectively connected to the second node, the third node and a ground node. The voltage control unit utilizes a voltage of the second node as a mode selection signal to select the DCDC function or LDO function.

REFERENCES:
patent: 2005/0017701 (2005-01-01), Hsu
patent: 2006/0267562 (2006-11-01), Szepesi
patent: 2007/0024256 (2007-02-01), Chou

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