Motorola Corporation

Freescale Semiconductor,inc.

Daniel Patrick McCarthy

Lawrence Edwin Connell

Michael Lee Bushman

Neal W Hollenbeck

A regulation circuit, incorporated in a single integrated circuit with a first circuit load, which as an input coupled to a power supply which produces a source voltage, and a first output coupled to the first circuit load. The regulation circuit comprises an input capacitor for reducing the magnitude of a voltage change at the first output, and at least a first voltage regulator for producing a predetermined voltage at the first load.

High performance integrated circuit regulator with substrate transient suppression

A voltage regulator for isolating radio frequency circuits from on chip digital circuit originated noise and an integrated circuit chip including the voltage regulator. The voltage regulator includes regulator device (a PFET) driven by a sense amplifier to derive a regulator voltage from a supply voltage . Another sense amplifier senses changes in output load and adjusts current flow through a current shunt so that the current shunt shunts excess load current. The sense amplifier driving the voltage regulator device senses current flow through the current shunt and adjusts the current supplied by the regulator device to reduce excess current. The current shunt is a series connected PFET and NFET diode , with the gate of the PFET driven to control current flow. Each of the sense amplifiers includes a pair of PFETs and a pair of NFETs , the drain of each PFET of the pair is tied to a corresponding drain of one of the pair of NFETs. A voltage divider connected between the regulator voltage and ground provides a sense voltage to the output sense amplifier so that the output sense amplifier compares the sense voltage against a reference voltage (VREF) to determine whether the regulator device is providing too much, not enough or just the right output current level.

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Elk Grove Village, IL, United States of America

Daniel Patrick McCarthy