YB1682

YB1682 2A 380KHz 20V PWM Buck DC/DC Converter Description The YB1682 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 YB1682 serves as ideal power supply units for portable devices. Features „ 2A Constant Output Current „ 140mΩ RDSON Internal Power PMOSFET „ „ „ „ „ „ „ „ Switch Up to 92% Efficiency Fixed 380KHz Frequency Wide 3.6V to 20V Input Voltage Range Output Adjustable from 1.222V to 18V Output Current Protection Built in Frequency Compensation Built in Thermal Shutdown Function Built in Current Limit Function „ SOP8 Package is Available „ The Minimum Dropout up to 0.3V „ Pb-free Package Applications „ White LED Backlighting „ Handheld PCs and PDAs „ Mobile Phone „ DSC and DV Flash Light Application Typical Application Circuit Figure 1: Typical Application Circuit Pin Configuration YB1682 Rev.1.0 www.yobon.com.tw 1 YB1682 2A 380KHz 20V PWM Buck DC/DC Converter NC VIN SW GND 1 2 3 4 SOP-8 8 7 6 5 NC EN NC FB F...