English
Language : 

YB1683 Datasheet, PDF (1/9 Pages) YOBON TECHNOLOGIES,INC. – 3A 380KHz 28V PWM Buck DC/DC Converter
YB1683
3A 380KHz 28V PWM Buck DC/DC Converter
Description
The YB1683 is a 380 KHz fixed frequency
monolithic step down switch mode
regulator with a built in internal Power
MOSFET. It achieves 3A 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 YB1683 serves as ideal power supply
units for portable devices.
Features
„ 3A Constant Output Current
„ 140mΩ RDSON Internal Power PMOSFET
Switch
„ Up to 92% Efficiency
„ Fixed 380KHz Frequency
„ Wide 3.6V to 28V Input Voltage Range
„ Output Adjustable from 1.222V to 26V
„ 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
„ Portable DVD
„ LCD Monitor / TV
„ Battery Charger
„ ADSL Modem
„ Telecom / Networking Equipment
Typical Application Circuit
Figure 1: Typical Application Circuit
YB1683 Rev.1.0
www.yobon.com.tw
1