EMH7021

ESMT/EMP EMH7021 1A, 500KHz PWM Synchronous Boost Converter with Output Isolated During Shutdown 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.     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 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 With 150 Ω 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 package. is also available in 3X3mm TDFN-10        Applications  Mobile Phone Typical Application Elite Semiconductor Memory Technology Inc./Elite MicroPower Inc. Publication Date: May 2012 Revision: 1.1 1/16 ESMT/EMP Connection Diagrams Order in...