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AAT3222IGV-2.0-T1 参数 Datasheet PDF下载

AAT3222IGV-2.0-T1图片预览
型号: AAT3222IGV-2.0-T1
PDF下载: 下载PDF文件 查看货源
内容描述: 150毫安纳安级™ LDO线性稳压器 [150mA NanoPower⑩ LDO Linear Regulator]
分类和应用: 稳压器光电二极管
文件页数/大小: 18 页 / 190 K
品牌: AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
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AAT3221/2  
150mA NanoPower™ LDO Linear Regulator  
Functional Block Diagram  
IN  
OUT  
Over-Current  
Protection  
Over-Temperature  
Protection  
EN  
VREF  
GND  
high performance LDO regulator is especially well  
suited for circuit applications that are sensitive to  
load circuit power consumption and extended bat-  
Functional Description  
The AAT3221 and AAT3222 are intended for LDO  
regulator applications where output current load  
requirements range from no load to 150mA. The  
advanced circuit design of the AAT3221/2 has been  
optimized for very low quiescent or ground current  
consumption, making it ideal for use in power man-  
agement systems for small battery-operated  
devices. The typical quiescent current level is just  
1.1µA. AAT3221/2 devices also contain an enable  
circuit which has been provided to shut down the  
LDO regulator for additional power conservation in  
portable products. In the shutdown state, the LDO  
draws less than 1µA from input supply.  
tery life.  
The LDO regulator output has been specifically  
optimized to function with low-cost, low-ESR  
ceramic capacitors. However, the design will allow  
for operation with a wide range of capacitor types.  
The AAT3221/2 has complete short-circuit and  
thermal protection. The integral combination of  
these two internal protection circuits gives the  
AAT3221/2 a comprehensive safety system to  
guard against extreme adverse operating condi-  
tions. Device power dissipation is limited to the  
package type and thermal dissipation properties.  
Refer to the Thermal Considerations section of this  
document for details on device operation at maxi-  
mum output load levels.  
The LDO also demonstrates excellent power sup-  
ply ripple rejection (PSRR) and load and line tran-  
sient response characteristics. The AAT3221/2  
3221.2005.12.1.11  
9