Preliminary
Elite MicroPower Inc.
EMQ8931
3-Channel Power Management IC For Portable Devices
GENERAL DESCRIPTION
The EMQ8931 is a high efficiency, 3-channel power management IC for portable devices application.
It integrates a complete linear charger for single cell lithium-ion battery, a linear
regulator and a high efficiency step-down DC/DC converter.
The linear charger (CH1) operates from 4.
25V to 5.
5V input voltage and up to 1A charging capability.
It is thermal regulated and specifically designed to work within USB power specifications.
The linear
regulator (CH2) features ultra-high power
supply rejection ratio (75dB at 1kHz), low output voltage noise (30µV), low dropout voltage (180m...