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发布者:微桥 发布时间:2010/11/24 阅读:7203次    关键字: TPS61020 EMH7021
EMH7021-1A,96% 效率同步升压IC 替代:TPS61020


EMH7021-1A,500KHz PWM Synchronous Boost Converter with Output Isolated During Shutdown DataSheet

General Description
    The EMH7021 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 150Ω 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 EMH7021 include current limit, low
battery comparator, open-drain power good output, short circuit, and thermal shutdown protection. The EMH7021 is also available in 3X3mm TDFN-10 package.

Features
 Up to 96% efficiency
 Reference voltage: 0.5V
 Output to input disconnect at shutdown mode
 Current delivery
 - 1A@VOUT=3.3V, VBAT=2.4V
 - 1A@VOUT=5.0V, VBAT=3.6V
 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: 48uA (Tpy.)
 Low shutdown current < 1uA
 TDFN 3x3mm 10 pins package

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

申请样品/demo
请发邮件到sales@micro-bridge.com(注明详细联络方式)
或者在线申请http://www.micro-bridge.com/aloform/

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