Step-down type switching regulator

Details Step-down type switching regulator Step-down type switching regulator

2006-06-26

2009-08-18

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S225000, C323S285000

Reexamination Certificate

active

07576529

ABSTRACT:
A pulse signal generating circuit generates a pulse signal having a duty ratio controlled such that the output voltage approaches a reference voltage. A driver circuit generates first and second gate voltages, which are to be respectively applied to the gates of a switching transistor and a synchronous rectifier transistor, based upon the pulse signal. A threshold voltage generating unit generates a threshold voltage which is synchronous with the second gate voltage, and which is in the high-level state during a period when the synchronous rectifier transistor is to be turned off and in the low-level state during a period when the synchronous rectifier transistor is to be turned on. A light-load detection comparator compares a switching voltage with the threshold voltage, and outputs a light-load detection signal.

REFERENCES:
patent: 5912552 (1999-06-01), Tateishi
patent: 7166993 (2007-01-01), Shimizu et al.
patent: 7352160 (2008-04-01), Shimizu et al.
patent: 2009/0072626 (2009-03-01), Watanabe et al.
patent: 2000-92824 (2000-03-01), None
patent: 2002-252971 (2002-09-01), None
patent: 2002-281743 (2002-09-01), None
patent: 2003-319643 (2003-11-01), None
patent: 2004-32875 (2004-01-01), None
patent: 2004-364488 (2004-12-01), None
patent: 2005-65447 (2005-03-01), None
International Search Report for International Application No. PCT/JP2006-312718 mailed Sep. 19, 2006.
Written Opinion of the International Searching Authority for PCT/JP2006-312712 mailed Sep. 19, 2006.

Affiliated with

Also associated with

Rating

Step-down type switching regulator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Step-down type switching regulator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Step-down type switching regulator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4103644