Charge pump-type DC/DC converter

Details Charge pump-type DC/DC converter Charge pump-type DC/DC converter

2007-10-19

2011-10-25

Behm, Harry (Department: 2838)

Electric power conversion systems

Current conversion

With voltage multiplication means

C327S536000, C327S537000

Reexamination Certificate

active

08045349

ABSTRACT:
A charge pump-type DC/DC converter is provided that steadily operates even when boosting reference voltage is low. A PMOS transistor for short-circuiting an output terminal of a charge pump of an initial stage with a booster reference voltage is provided to eliminate the influence of a parasitic diode of a PMOS transistor within the charge pump of the initial stage during build-up. The PMOS transistor is controlled by the voltage of another charge pump and the short-circuit described above is released by the increase of the output voltage of the other charge pump.

REFERENCES:
patent: 6172886 (2001-01-01), Lauterbach et al.
patent: 6177829 (2001-01-01), Jones et al.
patent: 6278318 (2001-08-01), Watanabe
patent: 6535052 (2003-03-01), Myono
patent: 7183837 (2007-02-01), Fujiwara
patent: 2005/0213356 (2005-09-01), Yanagida et al.
patent: 2007/0194834 (2007-08-01), Sohara et al.
patent: 2000500960 (2000-01-01), None
patent: 2000236658 (2000-08-01), None
patent: 2005278356 (2005-06-01), None

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