Circuit and method for soft start of a switching regulator...

Details Circuit and method for soft start of a switching regulator... Circuit and method for soft start of a switching regulator...

2008-03-24

2009-08-18

Sterrett, Jeffrey L (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S284000, C323S901000

Reexamination Certificate

active

07576522

ABSTRACT:
For soft start of a switching regulator, the output voltage of the switching regulator is fed back to be compared with a ramp signal, in order to trigger a comparison signal when the ramp signal rises up to reach the feedback signal, to enable the switching regulator such that the output voltage changes from a residual voltage toward a target value. The low side switch of the switching regulator is kept off for a period of time after the switching regulator is enabled, so as to prevent a reverse current during the soft start period.

REFERENCES:
patent: 6765371 (2004-07-01), Kataoka
patent: 2004/0022078 (2004-02-01), Shieh
patent: 2007/0064454 (2007-03-01), Chen et al.
patent: 2008/0238397 (2008-10-01), Chen et al.

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