EMQ8931 Datasheet | Elite MicroPower

Preliminary Elite Micro Power Inc. 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 plete 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 (75d B at 1k Hz), low output voltage noise (30µV), low dropout voltage (180m V), low quiescent current (110µA) and fast transient response. It operates from 2.5V to 5.5V input voltage, up to 300m A loading capability and regulates adjustable output voltage from 1.2V to 5.0V. accuracy ＊ ＊ ＊ ＊ ＊ ＊ Automatic recharge Charge status indicator C/10 charge termination Battery reverse leakage current less than 1µA 45µA shutdown supply current Soft-start limits inrush current ． Linear Regulator ＊ ＊ ＊ 1.2V to 5.0V Output Voltage 75d B Typical PSRR at 1k Hz 30µV RMS Output Voltage Noise (10Hz to 100k Hz) ＊ 180m V Typical Dropout at 300m A ． Synchronous Buck Converter ＊ ＊ ＊ ＊ 0.6V to VIN Output Voltage Up to 95% Efficiency Low Dropout Operation: 100% Duty Cycle No Schottky Diode Needed The Synchronous Buck converter (CH3) operates from 2.5V to 5.5V input voltage, up to 600m A loading capability and regulate adjustable output voltage from 0.6V to VIN. It Features low quiescent current, 1.5MHz internal frequency operation. ．Shutdown Current < 1µA (CH1-CH3) ．Independent Enable PIN(CH1-CH3) ．Independent Input Voltage PIN(CH1-CH3) ．No External pensation Network is needed The EMQ8931 is available in TSSOP-20FD package, It is Ro HS (Pb-free). ．Excellent Line and Load Transient Response(CH1-CH3) ．Over Current Protection Features ． Linear Charger ＊ ＊ ＊ 4.25V to 5.5V...