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
YB1683 Rev.1.0
Figure 1: Typical Application Circuit
www.yobon.com.tw
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