High performance dual section voltage regulator

Details High performance dual section voltage regulator High performance dual section voltage regulator

1995-01-24

1997-01-07

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323271, 323277, G05F 140

Patent

active

055920721

ABSTRACT:
The voltage regulator includes two sections, a switching regulator section (12) for regulating a voltage from an input (10) to an intermediate node (14). This voltage on the intermediate node (14) is then regulated with a linear regulator down to a regulated output voltage on an output node (18). The linear regulator includes a pass transistor (16) that is controlled by a linear regulator control (50). Linear regulator control (50) is operable to sense the voltage across the transistor (16) and perform multiple functions. First, it controls the pass element transistor (16) to regulate the voltage from the node (14) to the node (18) in a linear manner. Second, it controls the switching regulator section (12) to provide a regulated voltage on the node (14). Third, it controls the level of the voltage on the intermediate node (14) such that it is at a predetermined voltage level above the voltage on the output node (18), such that the power dissipation through the pass element transistor (16) is minimized.

REFERENCES:
patent: 4679130 (1987-07-01), Moscovici
patent: 4881023 (1989-11-01), Perusse et al.
patent: 4893228 (1990-01-01), Orrick et al.
patent: 5216351 (1993-06-01), Shimoda
patent: 5357418 (1994-10-01), Clavel
patent: 5414340 (1995-05-01), Gannon

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