Load transient detection and clock reset circuit

Patent metadata

Field	Value
Publication number	US-8994350-B2
Application number	US-94666210-A
Country	US
Kind code	B2
Filing date	Nov 15, 2010
Priority date	Nov 15, 2010
Publication date	Mar 31, 2015
Grant date	Mar 31, 2015

Abstract

A switching regulator comprises a PWM controller that controls switching of a power converter via a PWM control signal. The switching regulator detects load transients in the load driven by the power converter. Responsive to the detection of a load transient, the switching regulator resets a PWM clock synchronously with a fast clock operating at a higher frequency than the PWM clock. By doing so, the switching regulator beneficially responds more quickly to changes in the load than with conventional architectures that utilize only the slower PWM clock. This provides improved transient response without sacrificing power efficiency.

First claim

What is claimed is:

1. A switching regulator, comprising:
a PWM controller configured to receive a PWM clock signal and generate a PWM control signal based on the PWM clock signal;
a power converter configured to receive the PWM control signal from the PWM controller and provide regulated power to a load, the regulated power controllable by varying a duty cycle of the PWM control signal;
a load transient detection circuit configured to detect an increase in load exceeding a de…

Assignees

• Li Yang
• Dialog Semiconductor Inc

Inventors

• Li Yang

Classifications

• H02M3/158 Primary

  Electricity · mapped topic

• H02M2003/1566

  Electricity · mapped topic

• H02M3/1566

  Electricity · mapped topic