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AAT3239ITS-1.5-T1

更新时间： 2024-01-11 16:45:21
品牌 Logo 应用领域
ANALOGICTECH /
页数 文件大小 规格书
14页 279K
描述
500mA MicroPower LDO

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AAT3239ITS-1.5-T1 技术参数

是否Rohs认证： 符合生命周期：Obsolete
包装说明：,Reach Compliance Code：unknown
风险等级：5.84湿度敏感等级：1
Base Number Matches：1

AAT3239ITS-1.5-T1 数据手册

 浏览型号AAT3239ITS-1.5-T1的Datasheet PDF文件第5页浏览型号AAT3239ITS-1.5-T1的Datasheet PDF文件第6页浏览型号AAT3239ITS-1.5-T1的Datasheet PDF文件第7页浏览型号AAT3239ITS-1.5-T1的Datasheet PDF文件第9页浏览型号AAT3239ITS-1.5-T1的Datasheet PDF文件第10页浏览型号AAT3239ITS-1.5-T1的Datasheet PDF文件第11页 
AAT3239  
500mA MicroPower™ LDO  
Functional Block Diagram  
OUT  
IN  
Active  
Feedback  
Control  
Over-Current  
Protection  
Over-  
Temperature  
Protection  
+
Error  
Amplifier  
-
Fast  
Start  
Control  
Voltage  
Reference  
EN  
BYP  
GND  
applications where fast line and load transient  
response are required. This rapid transient  
response behavior is accomplished through the  
implementation of an active error amplifier feedback  
control. This proprietary circuit design is unique to  
this MicroPower LDO regulator.  
Functional Description  
The AAT3239 is intended for LDO regulator appli-  
cations where output current load requirements  
range from no load to 500mA. Refer to the Thermal  
Considerations discussion of this datasheet for  
details on maximum power dissipation.  
The LDO regulator output has been specifically  
optimized to function with low-cost, low-ESR  
ceramic capacitors. However, the design will allow  
for operation over a wide range of capacitor types.  
The advanced circuit design of the AAT3239 has  
been specifically optimized for very fast start-up  
and shutdown timing. This CMOS LDO has been  
tailored for superior transient response characteris-  
tics, a trait which is particularly important for appli-  
cations that require fast power supply timing, such  
as GSM cellular telephone handsets.  
A bypass pin has been provided to allow the addition  
of an optional voltage reference bypass capacitor to  
reduce output self noise and increase power supply  
ripple rejection. Device self noise and PSRR will be  
improved by the addition of a small ceramic capaci-  
tor in this pin. However, increased values of CBYPASS  
may slow down the LDO regulator turn-on time.  
The high-speed turn-on capability of the AAT3239  
is enabled through the implementation of a fast  
start control circuit, which accelerates the power-  
up behavior of fundamental control and feedback  
circuits within the LDO regulator.  
This LDO regulator has complete short-circuit and  
thermal protection. The integral combination of  
these two internal protection circuits gives the  
AAT3239 a comprehensive safety system to guard  
against extreme adverse operating conditions.  
Device power dissipation is limited to the package  
type and thermal dissipation properties. Refer to the  
Thermal Considerations discussion of this datasheet  
for details on device operation at maximum output  
current loads.  
Fast turn-off response time is achieved by an  
active output pull-down circuit, which is enabled  
when the LDO regulator is placed in shutdown  
mode. This active fast shutdown circuit has no  
adverse effect on normal device operation.  
The AAT3239 has very fast transient response  
characteristics, which is an important feature for  
8
3239.2006.03.1.2  
1...567891011...14

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