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EMQ9904 Dataheets PDF



Part Number EMQ9904
Manufacturers Elite Semiconductor
Logo Elite Semiconductor
Description 4 Channel Power Management IC
Datasheet EMQ9904 DatasheetEMQ9904 Datasheet (PDF)

ESMT/EMP EMQ9904 4 Channel Power Management IC For Portable Devices GENERAL DESCRIPTION The EMQ9904 is a high efficiency, 4-channel power management IC for battery-powered, portable devices application. It integrates a high efficiency step-up DC/DC converter, a linear regulator and two high efficiency step-down DC/DC converters. The step-up DC/DC converter (CH1) can start up 0.9V typically with operating voltage down to 0.6V and up to 500mA loading capability. It features with extreme low 26μA.

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ESMT/EMP EMQ9904 4 Channel Power Management IC For Portable Devices GENERAL DESCRIPTION The EMQ9904 is a high efficiency, 4-channel power management IC for battery-powered, portable devices application. It integrates a high efficiency step-up DC/DC converter, a linear regulator and two high efficiency step-down DC/DC converters. The step-up DC/DC converter (CH1) can start up 0.9V typically with operating voltage down to 0.6V and up to 500mA loading capability. It features with extreme low 26μA quiescent current with no load, which is the best fit for extending battery life during the standby mode. The linear regulator (CH2) features ultra-high power supply rejection ratio (75dB at 1kHz), low output voltage noise (30µV), low dropout voltage (270mV), low quiescent current (110µA) and fast transient response. It operates from 2.5V to 5.5V input voltage, up to 600mA loading capability and regulates adjustable output voltage from 1.2V to 5.0V. FEATURES . Battery powered Synchronous boost Converter * 1.8V to 5.5V Output Voltage * Up to 93% Efficiency * Output Current up to 500mA * Typical Iq 26μA with No Load * 1.1V to 5.5V operating Voltage * 0.9V start-up input voltage . Linear Regulator * 1.2V to 5.0V Output Voltage * 75dB Typical PSRR at 1kHz * 30µV RMS Output Voltage Noise (10Hz to 100kHz) * 270mV Typical Dropout at 600mA . Two Synchronous Buck Converters * 0.6V to 5.5V Output Voltage * Up to 95% Efficiency * Low Dropout Operation: 100% Duty Cycle .No Schottky Diode Needed for Above Converters .Shutdown Current < 1μA(CH1-CH4) .Independent Enable PIN (CH1-CH4) .Independent Input Voltage PIN(CH1-CH4) .No External Compensation Network is needed .Excellent Line and Load Transient Response (CH1-CH4) .Over Current Protection(CH1-CH4) .Over Temperature Protection(CH2, CH3, CH4) 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 current, 1.5MHz internal frequency operation. The EMQ9904 is available in TQFN24 4x4 package, It is Green compliant (RoHS and Halogen-free). APPLICATIONS .Hand-held Instruments .Battery-powered systems .Portable information applications .Wireless Networking .Digital Still Cameras Elite Semiconductor Memory Technology Inc./Elite MicroPower Inc. Publication Date : May 2009 Revision : 2.0 1/29 ESMT/EMP EMQ9904 Figure 1. Typical Application CONNECTION DIAGRAM TQFN24 4x4 ORDER INFORMATION EMQ9904-00HC24NRR 00 HC24 NRR Adjustable output voltage TQFN-24 Package RoHS & Halogen free Rating: -40 to 85°C Package in Tape & Reel Elite Semiconductor Memory Technology Inc./Elite MicroPower Inc. Publication Date : May 2009 Revision : 2.0 1/29 ESMT/EMP Order, Mark & Packing Information Package Product ID Marking EMQ9904 Packing TQFN24 EMQ9904-00HC24NRR 3K units Tape & Reel TERMINAL FUNCTIONS NAME LX1 OUT1 FB1 TERMINAL NO. 1 2 3 I/O I B I DESCRIPTION CH1 Switch PIN. Must be con.


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