3A 380KHZ 28V PWM Buck DC/DC Converter
General Description
The EC9483 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 EC9483 serves as ideal power supply units for portable devices.
Features
3A Constant Output Current
140mΩ RDSON Internal Power PMOSFET
Switch
Up to 95% Efficiency
Fixed 380KHz Frequency
Wide 3.6V to 28V Input Voltage Range
Output Adjustable from 1.222V to 26V
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
Applications
Portable DVD
LCD Monitor / TV
Battery Charger
ADSL Modem
Telecom / Networking Equipment
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