Patent · US Active

CC-CV method to control the startup current for LDO

US9170594B2 · kind B2 · utility

2Cited by

3References

34Claims

0Family size

Assignee

DIALOG SEMICONDUCTOR INC. · DE

Inventors

Ambreesh Bhattad · Swindon, GB
Frank Kronmueller · Neudenau, DE
Alper Ucar · Reading, GB
Hande Kurnaz · Kirchheim unter Teck, DE

Key dates

Filing date	Jan 6, 2014
Grant date	Oct 27, 2015
Priority date	—
Expiry date	Jun 29, 2034

Classification

Technology area (CPC G)Physics
CPC primaryG05F1/573
WIPO fieldControl
WIPO sectorInstruments

Abstract

Methods and circuits for linearly controlling a limited, constant current during startup of LDOs, amplifiers, or DC-to-DC converters independent of load capacitor size and controlling a clean transition without glitches from a constant current (CC) mode during startup to a constant voltage (CV) mode during normal operation (CC-CV method) are disclosed. The constant current control loop and the constant voltage control loop are implemented in such a way that at the end of startup the voltage loop has taken over control and the current loop is moved far away from its active transistor region, allowing a switch of modes to occur without any nasty transitions on the output.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.