EMQ9920

ESMT/EMP Portable Devices GENERAL DESCRIPTION The EMQ9920 is a high efficiency, 2-channel power management IC for battery-powered, portable devices application. It integrates two high efficiency step-down DC/DC converters. The two Synchronous Buck converters (CH3, CH4) operate from 2.5V to 5.5V input voltage, up to 600mA loading capability and regulate adjustable output voltage from 0.6V to 5.5V. It features low quiescent operation. current, 1.5MHz internal frequency EMQ9920 2 Channel Power Management IC For FEATURES Two Synchronous Buck Converters ．Achieve 95% efficiency ．Input Voltage : 2.5V to 5.5V ．Output Current up to 600mA ．Reference voltage 0.6V ．Quiescent Current 200μA with No Load ．Internal switching frequency 1.5MHz ．No Schottky Diode needed ．Low Dropout Operation: 100% Duty Cycle ．Shutdown current < 1μA The EMQ9920 is available in TQFN16 3x3 package. It is Green compliant (RoHS and Halogen-free). ．Excellent Line and Load Transient Response ．Over-temperature Protection APPLICATIONS ．Blue-Tooth devices ．Cellular and Smart Phones ．Personal multi-media Player (PMP) ．Wireless networking ．Digital Still Cameras ．Portable applications Figure 1. Typical Application Elite Semiconductor Memory Technology Inc./Elite MicroPower Inc. Publication Date : Mar. 2009 Revision : 2.0 1/18 ESMT/EMP CONNECTION DIAGRAM TQFN16 3x3 EMQ9920-00HB16NRR EMQ9920 ORDER INFORMATION 00 HB16 N R Adjustable output voltage TQFN16 Package Green(RoHS and Halogen-free) Commercial Grade Tempe...