Switching power supply controller with built-in supply...

Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source

Reexamination Certificate

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Reexamination Certificate

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07898109

ABSTRACT:
The invention provides a switching converter comprising as few as two high-side switching transistors and a low-side rectifying device, along with a control circuit. The switching converter is capable of operating from a main supply source or an auxiliary supply source. The invention further includes a method for producing a regulated voltage from a first supply voltage and a second supply voltage via the two high-side switching transistors and a low-side rectifying device.

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