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发布者:微桥 发布时间:2011/6/30 阅读:5777次    关键字: EML9206 PFM
EML9206-1.5MHz 600mA, Synchronous Buck Regulator


 
General Description
    EML9206 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 600mA output current capability. High 1.5MHz 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. EML9206 is designed base on Pulse Width Modulation (PWM) for low output voltage ripple and fixed frequency noise, while Pulse Frequency Modulation (PFM) is used to improve light load efficiency, and Low Dropout (LDO) Mode provides 100% duty cycle operation. The device is available in fixed output
 
Features
􀂄 Achieve 95% efficiency
􀂄 Input Voltage : 2.5V to 5.5V
􀂄 Output Current up to 600mA
􀂄 Quiescent Current 35μA with No Load
􀂄 Internal switching frequency 1.5MHz
􀂄 No Schottky Diode needed
􀂄 Low Dropout Operation: 100% Duty Cycle
􀂄 Shutdown current < 1μA
􀂄 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
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