AT1391 Datasheet | Aimtron Technology

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 1m A - Input voltage: 2.5V ~7.0V General Description The AT1391 provides plete 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 Ni Cd, Ni MH, 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 : http://.aimtron..tw 3/15/2006 REV:1.1 Email:service@aimtron..tw 1 Preliminary Product Information 1-Channel Step-Down PWM Controller Pin Configuration Ordering Information Part number AT1391P AT1391P_GRE Package TSSOP8 TSSOP8, Green Marking AT1391P AT1391P, date code with one bottom line - For more marking information, contact our sales representative directly Pin Description Symbol Pin No. Descript Symbol Pin No.(A/B) Descript GND VCC SCP CTL 1 2 3 4 Control blocks ground Power blocks power supply Short-Circuit protection Chip enable, high active SS FB P OUT 5 6 7 8 Sotf-start Error amplifier inverting input Error amplifier output Output for Pch-MOSFET 7F, No.9, PARK...