High performance on-chip voltage regulator designs

Details High performance on-chip voltage regulator designs High performance on-chip voltage regulator designs

1996-01-04

1998-02-24

Nguyen, Matthew V.

Electricity: power supply or regulation systems

Starting circuits

327540, H03K 301

Patent

active

057214859

ABSTRACT:
High performance on-chip voltage regulator designs are disclosed which have settling times which are fast enough to meet today's microprocessor/microcontroller requirements when they are entering an active mode from a passive mode. A first preferred embodiment provides a circuit in which a single pulse control signal is required to instantly raise Vy when the microprocessor is in the wake-up period. The circuit includes a charge pump, a differential amplifier, and a microprocessor connected to the power supply through a voltage regulating device. A second embodiment provides a circuit to stimulate Vint prior to CPU wake-up. The principle of operation of this embodiment is to stimulate the voltage regulating device prior to CPU wake-up. By stimulating (pulling down) the Vint node, the voltage regulating device will raise Vy and ready the microprocessor to draw a large current.

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