Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2006-06-20
2006-06-20
Berhane, Adolf (Department: 2838)
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
Reexamination Certificate
active
07064532
ABSTRACT:
In a voltage regulator according to an embodiment of the present invention, a delay circuit delays an enable signal by a delay time or less, the delay time corresponding to a certain time from a start of charging of the output capacitor to a completion of the charging of the output capacitor, and sends the delayed enable signal as a delayed signal to a mode selector. An overcurrent protection circuit unit operates according to a constant current type drooping characteristic from a time point of input of the enable signal. The overcurrent protection circuit unit operates according to a current limiting characteristic that can lower an output current below an upper limit value after a time point of input of the delayed signal. Thereby the output current having the upper limit value is prevented from continuing to flow after a time point of completion of charging of the output capacitor at the latest. The voltage regulator according to the embodiment of the present invention can protect the regulator itself and a load without lengthening a starting time.
REFERENCES:
patent: 4661879 (1987-04-01), Sato et al.
patent: 6411483 (2002-06-01), Sarles et al.
patent: 6465993 (2002-10-01), Clarkin et al.
patent: 63-078208 (1988-04-01), None
patent: 2002-091579 (2002-03-01), None
patent: 2003-285697 (2003-10-01), None
Berhane Adolf
Kananen Ronald P.
Rader & Fishman & Grauer, PLLC
Sony Corporation
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