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发布者:微桥 发布时间:2012/2/17 阅读:8805次    关键字: DC-DC
EML3418-1.3Hz,2A Synchronous Step-Down Converter


EML3418-1.3Hz,2A Synchronous Step-Down ConverterDataSheet

General Description
    EML3418 is designed with high efficiency step down DC/DC converter for portable devices applications. It features with extreme low quiescent current with no load which is the best fit for extending battery life during the standby mode. The device operates from 2.5V to 5.5V input voltage and up to 2.0A output current
capability. High 1.3MHz internal frequency makes small surface mount inductors and
capacitors possible and reduces overall PCB board space. Further, build-in synchronous switch makes external Schottky diode is no longer needed and efficiency is improved.
    EML3418 is designed base on pulse width modulation (PWM) for low output voltage ripple and fixed frequency noise, low dropout mode provides 100% duty cycle operation. Low reference voltage is designed for achieving regulated output down to 0.6V. The device is available in an adjustable version
for TDFN-8 and SOP-8FD package.

Features
􀂄 Achieve 95% efficiency
􀂄 Input Voltage : 2.5V to 5.5V
􀂄 Output Current up to 2A
􀂄 Reference voltage 0.6V
􀂄 Quiescent Current 240μA with No Switching
􀂄 Internal switching frequency 1.3MHz
􀂄 No Schottky Diode needed
􀂄 Low Dropout Operation: 100% Duty Cycle
􀂄 Shutdown current < 1μA
􀂄 Excellent Line and Load Transient Response
􀂄 Over-current and Over-temperature
Protection

Applications
􀂄 Blue-Tooth devices
􀂄 Cellular and Smart Phones
􀂄 Personal multi-media Player (PMP)
􀂄 Wireless networking
􀂄 Digital Still Cameras
􀂄 Portable applications

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