GENERAL DESCRIPTION
FEATURES
The PWM control circuit is able to adjust the duty ratio linearly from 0 to 100%. An enable function, an over current protection function and a short circuit protection function are built inside. An internal compensation block is built in to minimize external component count. z 3A Constant Output Current z 140mΩ RDSON Internal Power PMOSFET Switch z Up to 95% Efficiency z Fixed 380KHz Frequency z Wide 1.0V to 23V Input Voltage Range z Output Adjustable from 0.8V to 21V z Built in Frequency Compensation z Built in Thermal Shutdown Function z Built in Current Limit Function z SOP-8 Package is Available z The minimum dropout up to 0.3V The TD1539 serves as ideal power supply units for APPLICATIONS
portable devices. z Portable DVD z LCD Monitor / TV z Battery Charger z ADSL Modem z Telecom / Networking Equipment Package Types December, 20, 2005. Figure 1. Package Types of TD1539 Techcode Semiconductor Limited 1 Techcode® 3A 380KHz 23V PWM Buck DC/DC Converter Pin Configurations DATASHEET TD1539 Pin DESCRIPTION
Figure 2 Pin Configuration of TD1539 (Top View) Pin Number Pin Name DESCRIPTION
3 NC Not Connect.
Techcode
