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ACE721A 参数 Datasheet PDF下载

ACE721A图片预览
型号: ACE721A
PDF下载: 下载PDF文件 查看货源
内容描述: 1.2MHz的, 800毫安同步DC -DC降压转换器 [1.2MHz, 800mA SYNCHRONOUS DC-DC BUCK CONVERTER]
分类和应用: 转换器
文件页数/大小: 8 页 / 221 K
品牌: ACE [ ACE TECHNOLOGY CO., LTD. ]
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ACE721A  
Technology  
1.2MHz, 800mA SYNCHRONOUS DC-DC BUCK CONVERTER  
Description  
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  
Symbol  
VIN  
Value  
Unit  
V
Input Voltage  
-0.3 to 6  
Feedback Voltage  
EN Pin Voltage  
VFB  
-0.3 to VIN+0.3  
-0.3 to VIN+0.3  
-0.3 to VIN+0.3  
V
VEN  
V
SW Pin Voltage  
VSW  
θJA  
TJ  
V
Thermal Resistance  
Operating Junction Temperature  
Storage Temperature  
SOT-23-5  
125  
250 /W  
TSTG  
-65 to 150  
VER 1.3  
1
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