EC9413

EC9413 2A 380KHZ 20V PWM Buck DC/DC Converter General Description The EC9413 is a 380 KHz fixed frequency monolithic step down switch mode regulator with a built in internal Power MOSFET. It achieves 2A continuous output current over a wide input supply range with excellent load and line regulation. The device includes a voltage reference, oscillation circuit, error amplifier, internal PMOS and etc. 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. The EC9413 serves as ideal power supply units for portable devices. Block Diagram Features z 2A Constant Output Current z 140mΩ RDSON Internal Power PMOSFET Switch z Up to 95% Efficiency z Fixed 380KHz Frequency z Wide 3.6V to 20V Input Voltage Range z Output Adjustable from 1.20V to 18V z Built in Frequency Compensation z Built in Thermal Shutdown Function z Built in Current Limit Function z SOP8 Package is Available z The minimum dropout up to 0.3V Applications z Portable DVD z LCD Monitor / TV z Battery Charger z ADSL Modem z Telecom / Networking Equipment E-CMOS Corp. (www.ecmos.com.tw) Page 1 of 10 2007/08/21 EC9413 2A 380KHZ 20V PWM Buck DC/DC Converter Pin Configuration Pin Description Pin No. 1 2 3 4 Symbol FB Description Feedback Pin. Through an external resistor divider network, FB senses...