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US 5,905,370 AGranted
Programmable step down DC-DC converter controller
AssigneeFairchild Semiconductor Corporation
InventorStephen W. Bryson
Life of this patent
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Abstract
A programmable DC-DC converter controller with a high speed synchronous controller and a 5-bit programmable DAC provides an operating voltage to an external device (such as a microprocessor) in response to a 5 bit code programmed in the external device. The 5-bit programmable DAC outputs a signal which provides voltages to the external device in increments of e.g. 50 or 100 millivolts, in respectively two different voltage ranges.
Claims12
A programmable converter, comprising:
- at least one amplifier providing an output signal;
- a control unit to control a magnitude of the output signal of said at least one amplifier;
- and
- a circuit, responsive to a digital input signal, having an output signal coupled to said control unit specifying the magnitude of the output signal of said at least one amplifier,
- wherein the circuit specifies at least two ranges of the magnitude, each range having a specified number of increments;
- said circuit including a digital to analog converter, said digital input signal received from an external device, said digital input signal including a multi-bit signal with one bit specifying one of said ranges and the remaining bits specifying the magnitude of said output signal.
3 more elements
Dependencies are inferred from the claim text.