1.2MHz 800mA SYNCHRONOUS DC-DC BUCK CONVERTER - ACE Technology
Description
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ACE721A
Technology Description
1.
2MHz, 800mA SYNCHRONOUS DC-DC BUCK CONVERTER
The ACE721A is a 1.
2MHz fixed frequency, current mode, PWM synchronous buck (step-down) DC-DC converter, capable of driving a 800mA load with high efficiency, excellent line and load regulation.
The device integrates a main switch and a synchronous switch without an external Schottky diode.
It is ideal for powering portable equipment that runs from a single Li-ion battery.
A standard series of inductors are available from several different manufactures optimized for use with the ACE721A.
This feature greatly simplifies the design of switch-mode power supplies.
This IC is available in SOT-23-5 packages.
Features
• • • • • • • • • • • • • •
High Efficiency: up to 95% Output Current: 800mA Input Voltage Range: 2.
5V to 5.
5V Fixed 1.
2MHz Frequency Current Mode Control 100% Duty Cycle in Dropout Built-in Short Circuit Protection Built-in Thermal Shutdown Function Built-in Current Limit Function Shutdown Current: <1μA
Application
GPS WiFi Card Portable Media Player Digital Still and Video Cameras
Absolute Maximum Ratings
Parameter Input Voltage Feedback Voltage EN Pin Voltage SW Pin Voltage Thermal Resistance Operating Junction Temperature Storage Temperature Symbol VIN VFB VEN VSW θJA TJ TSTG Value -0.
3 to 6 -0.
3 to VIN+0.
3 -0.
3 to VIN+0.
3 -0.
3 to VIN+0.
3 SOT-23-5 125 -65 to 150 250 Unit V V V V ℃/W ℃ ℃
VER 1.
3
1
www.
DataSheet4U.
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ACE721A
Technology
1.
2MHz, 800mA SYNCHRONOUS DC-DC BUCK CONVERTER
Note 1: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
These are stress rating only, and functional operation of the device at th...
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