Semiconductor device, step-down chopper regulator, and...

Details Semiconductor device, step-down chopper regulator, and... Semiconductor device, step-down chopper regulator, and...

2007-08-30

2010-06-15

Patel, Rajnikant B (Department: 2838)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With bootstrap circuit

C327S537000, C326S088000

Reexamination Certificate

active

07737773

ABSTRACT:
A bootstrap circuit for a step-down chopper regulator IC includes an LDMOS transistor having a gate and a source connected to output terminals of a constant voltage circuit and a drain connected to a leader terminal of a boot voltage, and a bootstrap control circuit that performs control of turning on and off the LDMOS transistor so as to support high-speed oscillation without requiring expensive process and realize a stable step-down chopping action with a wide input voltage range.

REFERENCES:
patent: 5883547 (1999-03-01), Diazzi et al.
patent: 7019501 (2006-03-01), Dogome et al.
patent: 7084697 (2006-08-01), Kawagoshi
patent: 7106105 (2006-09-01), Bryson
patent: 2007/0159150 (2007-07-01), Hosokawa et al.
patent: 5-304768 (1993-11-01), None
patent: 2000-92822 (2000-03-01), None
patent: 2003-244946 (2003-08-01), None

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