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YB1685 Datasheet, PDF (1/9 Pages) YOBON TECHNOLOGIES,INC. – 2A 380KHz 32V PWM Buck DC/DC Converter
YB1685
2A 380KHz 32V PWM Buck DC/DC Converter
Description
The YB1685 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 YB1685 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 32V Input Voltage Range
„ Output Adjustable from 1.235V to 30V
„ 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
YB1685 Rev.1.0
www.yobon.com.tw
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