ACE722A Datasheet, PDF (1/9 Pages) ACE Technology Co., LTD. – 2A PWM BUCK DC-DC Converter

Technology
ACE722A
2A PWM BUCK DC-DC Converter
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
V_IN
-0.3 to 30
V
FB Pin Voltage
V_FB
-0.3 to 6
V
EN Pin Voltage
V_EN
-0.3 to V_IN
V
COMP Pin Voltage
V_COMP
-0.3 to 6
V
SW Pin Voltage
V_SW
-0.3 to V_IN
V
Power Dissipation
P_D Internally Limited mW
Thermal Resistance (Junction to Ambient, No Heat Sink, Free AIR) θ_JA
100
O_C/W
Operating Junction Temperature
T_J
150
O_C
Storage Temperature
T_STG
-65 to 150
O_C
Lead Temperature (Soldering, 10sec)
T_LEAD
260
O_C
ESD (Human Body Model)
ESD
2000
V
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