Switching regulator capable of preventing reverse current

Details Switching regulator capable of preventing reverse current Switching regulator capable of preventing reverse current

2008-05-06

2010-11-23

Berhane, Adolf (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S901000

Reexamination Certificate

active

07839130

ABSTRACT:
A switching regulator includes a first switch, an inductor, a second switch, a control circuit to control a switching operation by switching the first switch and switching the second switch complementally to the first switch, a reverse current protection circuit to shut off a current through the second switch to prevent a reverse current from an output terminal toward the second switch, and a soft-start circuit to cause the control circuit to perform a soft-start operation in which the output voltage is being increased gradually during a time period from a start-up to a predetermined elapsed time. The soft-start circuit causes the reverse current protection circuit to stop a shutoff operation of the current through the second switch when a generation or an indication of the reverse current is detected during the soft-start operation instructed by the control circuit.

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Korean Office Communication for JP 2007-126610.

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