Droop circuits and multi-phase DC-DC converters

Details Droop circuits and multi-phase DC-DC converters Droop circuits and multi-phase DC-DC converters

2011-04-19

2011-04-19

Sterrett, Jeffrey L (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S272000, C323S286000

Reexamination Certificate

active

07928704

ABSTRACT:
A droop circuit of a DC-DC converter is provided, wherein the DC-DC converter includes an output inductor coupled between an output of the DC-DC converter and a phase node for providing an output voltage. A current sense device is coupled between the phase node and the output of the DC-DC converter, includes an inductor coupled to the phase node and senses a current from the phase node. A first resistor is coupled to the current sense device. An amplifier circuit includes an amplifier having an inverting input, a non-inverting input coupled to the first resistor and an output directly connected to the inverting input, and a second resistor coupled between the inverting input and the output of the DC-DC converter. The amplifier circuit provides a droop current according to the second resistor and a voltage difference between the non-inverting input and the output of the DC-DC converter, and the voltage difference is related to the current.

REFERENCES:
patent: 6683441 (2004-01-01), Schiff et al.
patent: 7064528 (2006-06-01), Jochum et al.
patent: 7230406 (2007-06-01), Huang et al.
patent: RE39976 (2008-01-01), Schiff et al.
patent: 2004/0090217 (2004-05-01), Muratov et al.
patent: 2008/0169797 (2008-07-01), Zambetti et al.
patent: 2008/0197826 (2008-08-01), Schiff et al.
patent: 2010/0148738 (2010-06-01), Schiff

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