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US 7,612,546 B2Granted
Configurable internal/external linear voltage regulator
AssigneeIntersil Americas Inc.
InventorsJames W. Leith, Gustavo J. Mehas, Bogdan Duduman
Life of this patent
Estimating the term…
Abstract
A voltage regulator includes a voltage source for providing an input voltage. The regulator includes circuitry responsive to the input voltage for generating a regulated output voltage. The circuitry enables selection of one of internal linear voltage regulation or external linear voltage regulation for generating the regulated output voltage.
Claims15
A voltage regulator implemented on a single integrated circuit, comprising:
- a voltage source input for receiving an input voltage;
- an internal linear voltage regulator connected to receive the input voltage for providing internal linear voltage regulation;
- a first circuit for disabling the internal linear voltage regulator and enabling the voltage regulator to operate using external linear voltage regulation in a first selected mode of operation, and for enabling the internal voltage regulator and disabling the voltage regulator to operate using the external linear voltage regulation in a second selected mode of operation wherein the first circuit of the voltage regulator is user configurable to the first mode or the second mode of regulation.
A voltage regulator implemented on a single integrated circuit, comprising:
- a voltage source for providing an input voltage;
- an internal linear voltage regulator connected to receive the input voltage for providing internal linear voltage regulation;
- and
- a differential amplifier sub-block for selectively enabling the internal linear voltage regulator and disabling the voltage regulator to operate using external linear voltage regulation responsive to user configured grounding of a pin of the differential amplifier sub-block and for selectively disabling the internal linear voltage regulator and enabling the voltage regulator to operate using external linear voltage regulation responsive to user configured connection of the pin of the differential amplifier sub-block to at least one of a PNP device and a PMOS device.
1 more element
An apparatus implemented on a single integrated circuit, comprising:
- a voltage source input for receiving an input voltage;
- a band-gap generator for providing at least one reference voltage and one reference current;
- an internal linear voltage regulator connected to receive the input voltage and to the band-gap generator for providing internal linear voltage regulation;
- and
- a differential amplifier sub-block for selectively disabling the internal linear voltage regulator and providing an output to an external linear voltage regulator in a first mode of operation, the differential amplifier sub-block including a second mode of operation wherein the internal linear voltage regulator is enabled and an output to the external linear voltage regulator is not provided further wherein the first circuit of the voltage regulator is user configurable to the first mode or the second mode of regulation.
2 more elements
Dependencies are inferred from the claim text.