GENERAL DESCRIPTION
Built-in 0.35Ω NMOS switch and 0.45Ω PMOS synwww.DataSheet4U.com chronous rectification significantly improves efficiency and reduces external components count. High switching frequency (at 1.2MHz) allows easy filtering and faster loop performance. AME5172 uses SOT-25 package that gives a small size solution. 0.85V Single Cell Boost DC-DC Converter n Typical Application L1 4.7µH VIN CIN 4.7µF 1 5 VOUT 3.3V up to 200mA COUT 4.7µF IN SW AME5172 OUT OFF ON 3 EN GND 4 2 n FEATURES
l PWM Control with 1.2MHz Fixed Frequency l Up to 92% Efficiency l 0.85V Low Start-up Input Voltage l Internal Synchronous Rectifier l Fixed 3.3V Output Voltage Options l 0.8A, 0.35Ω Power MOSFET l 1µA Shutdown Current l True Shutdown l SOT-25 Package l All AME's Lead Free Products Meet RoHS Standards n APPLICATIONS
l Hand-held Devices l Digital Cameras l Portable APPLICATIONS
l MP3 Players l LCD Bias Power l Wireless Handsets Rev. A.02 1 AME, Inc. AME5172 n Function Block Diagram 0.85V Single...
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