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AAT2552 参数 Datasheet PDF下载

AAT2552图片预览
型号: AAT2552
PDF下载: 下载PDF文件 查看货源
内容描述: 用于便携式应用的总电源解决方案 [Total Power Solution for Portable Applications]
分类和应用: 便携式
文件页数/大小: 33 页 / 1050 K
品牌: ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
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AAT2552  
Total Power Solution for Portable Applications  
Pin Descriptions  
Pin # Symbol  
Function  
1
EN_BAT  
Enable pin for the battery charger. When connected to logic low, the battery charger is dis-  
abled and consumes less than 1µA of current. When connected to logic high, the charger  
operates normally (pulled down internally).  
2
ISET  
Charge current set point. Connect a resistor from this pin to ground. Refer to typical charac-  
teristics curves for resistor selection.  
3
4
AGND  
FBB  
Analog ground.  
Feedback input for the step-down converter. This pin must be connected directly to an exter-  
nal resistor divider. Nominal voltage is 0.6V.  
5
6
7
8
ENB  
MODE  
ENA  
Enable pin for the step-down converter. When connected to logic low, the step-down convert-  
er is disabled and consumes less than 1µA of current. When connected to logic high, the con-  
verter operates normally (pulled up internally).  
Pulled down internally for automatic PWM/LL operation. Connect to logic high for forced PWM.  
Drive with external clock signal to synchronize step-down converter to external clock in PWM  
mode.  
Enable pin for the linear regulator. When connected to logic low, the regulator is disabled and  
consumes less than 1µA of current. When connected to logic high, the LDO operates normal-  
ly (pulled up internally).  
Feedback input for the LDO. This pin must be connected directly to an external resistor divider.  
Nominal voltage is 1.24V.  
FBA  
9
OUTA  
INA  
INB  
LX  
Linear regulator output. Connect a 2.2µF capacitor from this pin to ground.  
Linear regulator input voltage. Connect a 1µF or greater capacitor from this pin to ground.  
Input voltage for the step-down converter.  
Output of the step-down converter. Connect the inductor to this pin. Internally, it is connected  
to the drain of both high- and low-side MOSFETs.  
10  
11  
12  
13  
14  
15  
16  
EP  
PGND  
BAT  
ADP  
Power ground.  
Battery charging and sensing. Connect to positive terminal of Lithium-ion/polymer battery.  
Input from USB port or AC wall adapter.  
Open drain status pin for charger.  
STAT  
Exposed paddle (bottom): connect to ground directly beneath the package.  
Pin Configuration  
TDFN34-16  
(Top View)  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
STAT  
ADP  
BAT  
PGND  
LX  
INB  
INA  
EN_BAT  
ISET  
AGND  
FBB  
ENB  
MODE  
ENA  
FBA  
OUTA  
2
2552.2007.04.1.0  
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