Switching regulator

Details Switching regulator Switching regulator

2007-04-17

2009-12-15

Patel, Rajnikant B (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S222000

Reexamination Certificate

active

07633278

ABSTRACT:
In a replica circuit, a potential simulating a waveform of current passing through an inductor is generated as a referential potential. A timing when the referential potential and an output potential become substantially the same as each other and a timing when the current passing through the inductor becomes substantially zero are set to substantially correspond to each other. A control circuit turns off an NMOS transistor at a time when the current passing through the inductor becomes lower than 0 [A]. At this time, a PMOS transistor is already turned off. Therefore, the current passing through the inductor can be reliably prevented from flowing in reverse to the switch element.

REFERENCES:
patent: 4595992 (1986-06-01), Drogin
patent: 6310469 (2001-10-01), Bentolila et al.
patent: 7394231 (2008-07-01), Flatness et al.
patent: 2002-044939 (2002-02-01), None
patent: 2006-174626 (2006-06-01), None

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