System and methods for two-stage buck boost converters with fast transient response

Patent metadata

Field	Value
Publication number	US-9136756-B2
Application number	US-201313858740-A
Country	US
Kind code	B2
Filing date	Apr 8, 2013
Priority date	Mar 14, 2013
Publication date	Sep 15, 2015
Grant date	Sep 15, 2015

Abstract

Various embodiments of the invention provide for single and dual phase charge pump, two stage DC/DC buck-boost converters having fast line and load transient control irrespective of load conditions. In certain embodiments of the invention, this is accomplished by controlling a desired output voltage with an error amplifier that controls a plurality of hysteresis comparators. A dual phase charge pump architecture eliminates ripple currents and mode transitions and increases efficiency by splitting the total current between two paths. Certain embodiments allow to use low voltage semiconductor devices, which significantly reduces switching losses and further increases efficiency.

First claim

I claim:

1. A switching regulator to convert an input voltage into an output voltage, the switching regulator comprising:
a first switching stage coupled to a first output voltage node, the first switching stage receives a first input voltage to convert it into a first output voltage that is relatively lower than the first input voltage;
a second switching stage coupled to the first output voltage node, the second switching stage receives the first output voltage and converts th…

Assignees

• Maxim Integrated Products

Inventors

• Liu Rui

Classifications

• H02M3/1582

  Electricity · mapped topic

• H02M3/07 Primary

  Electricity · mapped topic