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ACE722A Datasheet(PDF) 1 Page - ACE Technology Co., LTD. |
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ACE722A Datasheet(HTML) 1 Page - ACE Technology Co., LTD. |
1 / 9 page ACE722A Technology 2A PWM BUCK DC-DC Converter VER 1.2 1 Description 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 R DSON 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 Symbol Max Unit Input Voltage VIN -0.3 to 30 V FB Pin Voltage VFB -0.3 to 6 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 Thermal Resistance (Junction to Ambient, No Heat Sink, Free AIR) θJA 100 OC/W Operating Junction Temperature TJ 150 OC Storage Temperature TSTG -65 to 150 OC Lead Temperature (Soldering, 10sec) TLEAD 260 OC ESD (Human Body Model) ESD 2000 V |
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