Step-down switching regulator with turn off undershoot...

Details Step-down switching regulator with turn off undershoot... Step-down switching regulator with turn off undershoot...

2009-02-03

2011-10-25

Sterrett, Jeffrey (Department: 2838)

Electricity: power supply or regulation systems

In shunt with source or load

Using a three or more terminal semiconductive device

C323S271000, C323S351000

Reexamination Certificate

active

08044641

ABSTRACT:
A step-down switching regulator prevents an output voltage undershoot and enables a quick lowering of an output voltage immediately after turning off of power supply. The step-down switching regulator includes an NMOS transistor connected between an output terminal and a ground voltage and another NMOS transistor connected in parallel with a synchronous rectification transistor. Upon reception of an on/off signal for terminating the operation of the switching regulator, the NMOS transistors are turned on into an on-state.

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