AT1309 Datasheet | Aimtron Technology

Feature - Operating Voltage:2.5V to 6.0V. - High Operating Frequency: 1.4MHz - High Output Voltage: Up to 28V - Shutdown Current <1µA - Digital Dimming Control. - Built-in Cycle-by Cycle Current-Limiting. - Built-in Soft-Start Function. - ±1.5% 1.23V Reference Voltage - Tiny SOT-25 Package Description The AT1309 step-up converter is designed for small or medium size LCD panel of high bias voltage with a constant current to provide PDAs, and other hand-held devices. It features a fast 1.4 MHz current-mode PWM control with a built-in 0.3 Ω N-MOS that allows for smaller capacitor and inductor. Fault condition protection uses cycle-by -cycle current limiting to sense maximum inductor current and thermal protection. Also included soft-start eliminates inrush current during start-up. The AT1309 is available in 5-pin SOT-25 packages. Application - STN/OLED Bias - Personal Digital Assistants(PDAs) - DSC 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 3/2/2006 REV:1.1 Email: service@aimtron..tw 1 Preliminary Product Information Micro-Power Step up DC-DC Converter Pin Configuration Ordering Information Part number AT1309X AT1309X_GRE : Date Code - For more marking information, contact our sales representative directly Package SOT-25 SOT-25, Green Marking Date Code ,Date Code with one bottom line Pin Description Pin N0. 1 2 3 4 5 Symbol LX GND FB EN VIN I/O I P I I P Description Step-up Regulator N-MOS Drain. Place output diode and inductor. Ground Step-Up Regulator Feedback Input. Connect a sense resistor from FB to ground. Enable and Dimming Control Input. LED brightness and IC shutdown are controlled by the voltage on EN. Driving low for longer than 4ms to shutdown the IC. Power supply. 7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C....