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AAT3200IGY-2.5-T1 参数 Datasheet PDF下载

AAT3200IGY-2.5-T1图片预览
型号: AAT3200IGY-2.5-T1
PDF下载: 下载PDF文件 查看货源
内容描述: 能量总™ LDO线性稳压器 [OmniPower™ LDO Linear Regulator]
分类和应用: 稳压器
文件页数/大小: 16 页 / 173 K
品牌: AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
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AAT3200  
OmniPower™ LDO Linear Regulator  
Higher input-to-output voltage differentials can be  
obtained with the AAT3200, while maintaining  
device functions in the thermal safe operating area.  
To accomplish this, the device thermal resistance  
must be reduced by increasing the heat sink area  
or by operating the LDO regulator in a duty-cycled  
mode.  
Device Duty Cycle vs. VDROP  
(VOUT = 2.5V @ 25°C)  
3.5  
3
2.5  
200mA  
2
1.5  
150mA  
For example, an application requires VIN = 5.0V  
while VOUT = 3.0V at a 150mA load and TA = 85°C.  
VIN is greater than 4.33V, which is the maximum  
safe continuous input level for VOUT = 3.0V at  
150mA for TA = 85°C. To maintain this high input  
voltage and output current level, the LDO regulator  
must be operated in a duty-cycled mode. Refer to  
the following calculation for duty-cycle operation:  
1
0.5  
0
0
10  
10  
10  
20  
30  
40  
50  
60  
70  
80  
90  
100  
Duty Cycle (%)  
Device Duty Cycle vs. VDROP  
PD(MAX) is assumed to be 200mW.  
(VOUT = 2.5V @ 50°C)  
3.5  
3
IGND = 20µA  
IOUT = 150mA  
VIN = 5.0V  
VOUT = 3.0V  
100mA  
2.5  
2
200mA  
150mA  
1.5  
1
0.5  
0
PD(MAX)  
(VIN - VOUT)IOUT + (VIN × IGND  
%DC = 100  
)
0
20  
30  
40  
50  
60  
70  
80  
90  
100  
Duty Cycle (%)  
200mW  
(5.0V - 3.0V)150mA + (5.0V × 20µA)  
%DC = 100  
%DC = 66.6%  
Device Duty Cycle vs. VDROP  
(VOUT = 2.5V @ 85°C)  
For a 150mA output current and a 2.0V drop across  
the AAT3200 at an ambient temperature of 85°C,  
the maximum on-time duty cycle for the device  
would be 66.6%.  
3.5  
3
100mA  
50mA  
2.5  
2
The following family of curves shows the safe oper-  
ating area for duty-cycled operation from ambient  
room temperature to the maximum operating level.  
200mA  
150mA  
1.5  
1
0.5  
0
0
20  
30  
40  
50  
60  
70  
80  
90  
100  
Duty Cycle (%)  
12  
3200.2006.02.1.4  
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