2A PWM BUCK DC-DC Converter - ACE Technology
Description
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ACE722A
Technology
Description
2A PWM BUCK DC-DC Converter
ACE722A is a 420kHz fixed frequency PWM buck (step-down) DC-DC converter, capable of driving a 2A load with high efficiency, low ripple and excellent line and load regulation.
The device includes a voltage reference, an oscillation circuit, an error amplifier, an internal PMOS and etc.
The PWM control circuit is able to adjust the duty ratio linearly from 0 to 100%.
The enable function, over current protection function, short circuit protection function and soft-start function are built inside.
When OCP or SCP happens, the operation frequency will be reduced from 420kHz to 40kHz.
An internal compensation block is employed to minimize external components.
The ACE722A serves as an ideal power supply unit for portable devices, especially for chip set power in portable systems.
It’s widely used for PDVD, LCD monitor and DPF chip set powers.
Features
• • • • • • • • • • • • • • •
2A Constant Output Current 130mΩ RDSON Internal Power MOSFET Switch Up to 94% Efficiency Fixed 420kHz Frequency Wide 4.
75V to 25V Input Voltage Range Output Voltage Adjustable from 0.
8V to 21V Built in Thermal Shutdown Function Built-in Current Limit Function Built-in Soft-Start Function Support Ceramic or Electrolytic Capacitors
Application
Portable DVE LCD Monitor/LCD TV Digital Photo Frame ADSL Set-up Box
Absolute Maximum Ratings
Parameter Input Voltage FB Pin Voltage Symbol VIN VFB Max -0.
3 to 30 -0.
3 to 6 Unit V V
EN Pin Voltage VEN -0.
3 to VIN V COMP Pin Voltage VCOMP -0.
3 to 6 V SW Pin Voltage VSW -0.
3 to VIN V Power Dissipation PD Internally Limited mW O Thermal Resistance (Junction to Ambient, No Heat Sink, Free AIR) θJA 100 C/W O Operating Junction Temperature TJ 150 C O Storage Temperature TSTG -65 to 150 C O Lead Temperature (Soldering, 10sec) TLEAD 260 C ESD (Human Body Model) ESD 2000 V
VER 1.
2 1
www.
DataSheet4U.
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ACE722A
Technology
2A PWM BUCK DC-DC Converter
Note 1: Stresses greater th...
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