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发布者:微桥 发布时间:2013-1-15 阅读:4687次    关键字: DC-DC
EMH7023-500mA,500KHz Synchronous Boost Converter


EMH7023-500mA,500KHz PWM Synchronous Boost Converter with Output Isolated During Shutdown DataSheet

General Description
    The EMH7023 is a high efficiency, synchronous fixed frequency, current-mode step-up DC/DC converter. During shutdown mode, the output is completely isolated from the input without drawing any battery current. The fixed 500KHz switching frequency obtains maximum efficiency up to 96% and uses only a few external components.
    With 180Ω loading, the minimum start-up voltage can be as low as 0.93V, provided by a one or two-cell alkaline or one-cell Li-Lon battery.
    The features of EMH7023 include current limit, low battery comparator, open-drain power good output, short circuit, and thermal shutdown protection. The EMH7023 is also available in E-MSOP-8L package.

Features
 Up to 96% efficiency
 Reference voltage: 0.5V
 Output to input disconnect at shutdown mode
 500mA current delivery
 Switch current limit protection
 500KHz fixed switching frequency
 Thermal shutdown protection
 0.5V Low-battery comparator
 Min-start up voltage: 0.93V
 Low quiescent current: 50uA (Tpy.)
 Low shutdown current < 1uA
 E-MSOP 8 pins package

Applications
 Mobile Phone
 Digital Still Cameras
 Portable applications
 MP3 Players
 GPS Receivers

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