AT1391

www.DataSheet4U.com AT1391 Preliminary Product Information 1-Channel Step-Down PWM Controller Features High efficiency Using external P channel MOSFET Maximum Duty 100% Oscillation frequency 600KHz Soft Start by an external capacity Output voltage accuracy ±2% Built-in ON/OFF Function Built-in Short-circuit Protection Stand-by current max. 10µA Quiescent Current 1mA Input voltage: 2.5V ~7.0V General Description The AT1391 provides complete control and protection for a DC/DC converter optimized for high-performance microprocessor applications. It is designed to drive one P-Channel in a buck topology. The AT1391 integrates all of the control, output adjustment, and protection functions into a single package. The output voltage of the converter can be precisely regulated with a maximum tolerance of ±2% over temperature and line voltage variations. The AT1391 is a family of low-noise step-down DC/DC converters that is ideally suited for systems powered from a 1-cell Li-ion battery or from a 3-cell to 4-cell NiCd, NiMH, or alkaline battery. It can also be used to USB-Based power system. Applications Power Supply for portable devices Block Diagram Aimtron reserves the right without notice to change this circuitry and specifications. 7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 Fax: 886-3-563-0879 WWW: http://www.aimtron.com.tw 3/15/2006 REV:1.1 Email:[email protected] 1 AT1391 Preliminary...