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參數(shù)資料
| 型號： | AAT3218 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 150mA MicroPower⑩ High Performance LDO |
| 中文描述： | 150mA的微功耗高性能的LDO⑩ |
| 文件頁數(shù)： | 12/18頁 |
| 文件大?。?/td> | 321K |
| 代理商： | AAT3218 |
AAT3218
150mA MicroPower High Performance LDO
12
3218.2004.02.1.0
Applications Information
V
OUT
= 2.5 volts
I
OUT
= 150mA
I
GND
= 150uA
V
IN(MAX)
=(211mW+(2.5Vx150mA))/(150mA +150uA)
V
IN(MAX)
= 3.90V
Higher input to output voltage differentials can be
obtained with the AAT3218, while maintaining
device functions within 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.
For example, an application requires V
IN
= 4.2V
while V
OUT
= 2.5V at a 150mA load and T
A
= 85°C.
V
IN
is greater than 3.90V, which is the maximum
safe continuous input level for V
OUT
= 2.5V at
150mA for T
A
= 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:
P
D(MAX)
is assumed to be 211mW
I
GND
= 150μA
I
OUT
= 150mA
V
IN
= 4.2 volts
V
OUT
= 2.5 volt
%DC=100(P
D(MAX)
/((V
IN
-V
OUT
)I
OUT
+(V
IN
xI
GND
))
%DC=100(211mW/((4.2V-2.5V)150mA+(4.2Vx150μA))
%DC = 85.54%
For a 150mA output current and a 2.7volt drop
across the AAT3218 at an ambient temperature of
85°C, the maximum on time duty cycle for the
device would be 85.54%.
The following family of curves show the safe oper-
ating area for duty cycled operation from ambient
room temperature to the maximum operating level.
Device Duty Cycle vs. V
DROP
V
OUT
= 2.5V @ 85 C
0
0.5
1
1.5
2
2.5
3
3.5
0
10
20
30
40
50
60
70
80
90
100
Duty Cycle (%)
V
200mA
150mA
100mA
Device Duty Cycle vs. V
DROP
V
OUT
= 2.5V @ 50 C
0
0.5
1
1.5
2
2.5
3
3.5
0
10
20
30
40
50
60
70
80
90
100
Duty Cycle (%)
V
200mA
150mA
Device Duty Cycle vs. V
DROP
V
OUT
= 2.5V @ 25 C
0
0.5
1
1.5
2
2.5
3
3.5
0
10
20
30
40
50
60
70
80
90
100
Duty Cycle (%)
V
200mA
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PDF描述 |
|---|---|
| AAT3218IGV-1.2-T1 | 150mA MicroPower⑩ High Performance LDO |
| AAT3218IGV-1.5-T1 | 150mA MicroPower⑩ High Performance LDO |
| AAT3218IGV-2.0-T1 | 150mA MicroPower⑩ High Performance LDO |
| AAT3218IGV-2.3-T1 | 150mA MicroPower⑩ High Performance LDO |
| AAT3218IGV-2.5-T1 | 150mA MicroPower⑩ High Performance LDO |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT3218IGV-1.2-T1 | 制造商:Skyworks Solutions Inc 功能描述:IC REG LDO 1.2V 0.15A SOT23-5 TR 制造商:Skyworks Solutions Inc 功能描述:VOLTAGE REGULATOR |
| AAT3218IGV-1.5-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:150mA MicroPower⑩ High Performance LDO |
| AAT3218IGV-1.8-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:150mA MicroPower⑩ High Performance LDO |
| AAT3218IGV-1.9-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:150mA MicroPower⑩ High Performance LDO |
| AAT3218IGV-2.0-T1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:150mA MicroPower⑩ High Performance LDO |
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