Switching regulator

Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...

Reexamination Certificate

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Reexamination Certificate

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07088083

ABSTRACT:
The present invention provides a short-circuit protecting circuit of a switching regulator which does not require a capacitor having a large capacity in order to obtain a sufficient duty time. A pulse generating circuit for generating one clock with a short-circuit detection signal as a trigger signal is added, and a counter circuit for counting clock pulses of a clock signal is further inserted between a comparator and a latch circuit, whereby it becomes possible to produce a sufficient delay time based on a signal having a short period using a capacitor having a small capacity.

REFERENCES:
patent: 6163142 (2000-12-01), Tsujimoto
patent: 6300750 (2001-10-01), Oglesbee et al.
patent: 6580253 (2003-06-01), Kanakubo et al.
patent: 6847231 (2005-01-01), Kinugawa et al.

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