500KHz PWM Synchronous Boost Converter
ESMT/EMP
EMH7020
500mA, 500KHz PWM Synchronous Boost Converter with Output Isolated During Shutdown
General Descriptio...
Description
ESMT/EMP
EMH7020
500mA, 500KHz PWM Synchronous Boost Converter with Output Isolated During Shutdown
General Description
The EMH7020 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.
Applications
Mobile Phone Digital Still Cameras Portable applications MP3 Players GPS Receivers
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 TDFN 3x3mm 10 pins and E-MSOP 8 pins package
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 EMH7020 include current limit, low battery comparator, open-drain power good output, short circuit, and thermal shutdown protection. The EMH7020 is also available in 3X3mm TDFN-10 and E-MSOP-8L package.
Typical Application
Elite Semiconductor Memory Technology Inc./Elite MicroPower Inc.
Publication Date: Jun. 2012 Revision: 1.2 1/15
ESMT/EMP
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