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1. (WO2017192465) HEADROOM CONTROL IN REGULATOR SYSTEMS

Pub. No.:    WO/2017/192465    International Application No.:    PCT/US2017/030462
Publication Date: Fri Nov 10 00:59:59 CET 2017 International Filing Date: Tue May 02 01:59:59 CEST 2017
IPC: G05F 1/575
Applicants: QUALCOMM INCORPORATED
Inventors: DU, Mengmeng
GUAN, Hua
HO, Ngai Yeung
YUNG, Chi Fan
Title: HEADROOM CONTROL IN REGULATOR SYSTEMS
Abstract:
A voltage regulator control implementation dynamically detects and sets specified headroom for a low dropout (LDO) regulator at different loads to enable the LDO regulator to maintain high performance in conjunction with improved power efficiency. In one instance, an upstream voltage regulator may adaptively adjust an output voltage supplied to an input supply rail of a downstream LDO regulator based on an indication from the LDO regulator. The adaptively adjusted input voltage enables the downstream LDO regulator to achieve high performance and improved power efficiency across the entire range of load conditions.