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參數(shù)資料
| 型號： | AAT3200IGY-3.5-T1 |
| 廠商： | Advanced Analogic Technologies, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 1.5A Fast Ultra Low Dropout Linear Regulators |
| 中文描述： | 1.5A的快速超低壓差線性穩(wěn)壓器 |
| 文件頁數(shù)： | 12/16頁 |
| 文件大小： | 169K |
| 代理商： | AAT3200IGY-3.5-T1 |
AAT3200
OmniPower LDO Linear Regulator
12
3200.2005.04.1.1
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.
For example, an application requires V
IN
= 5.0V
while V
OUT
= 3.0V at a 150mA load and T
A
= 85°C.
V
IN
is greater than 4.33V, which is the maximum
safe continuous input level for V
OUT
= 3.0V 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 200mW
For a 150mA output current and a 2.0 volt drop
across the AAT3200 at an ambient temperature of
85°C, the maximum on-time duty cycle for the
device would be 66.6%.
The following family of curves shows the safe oper-
ating area for duty-cycled operation from ambient
room temperature to the maximum operating level.
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
50mA
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)
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
150mA
%DC = 100
I
GND
= 20
μ
A
I
OUT
= 150mA
V
IN
= 5.0V
V
OUT
= 3.0V
%DC = 66.6%
P
D(MAX)
(V
IN
- V
OUT
)I
OUT
+ (V
IN
×
I
GND
)
%DC = 100
200mW
(5.0V - 3.0V)150mA + (5.0V
×
20
μ
A)
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AAT3200IQY-1.8-T1 | 制造商:AAT 制造商全稱:AAT 功能描述:OmniPower? LDO Linear Regulator |
| AAT3200IQY-2.0-T1 | 制造商:AAT 制造商全稱:AAT 功能描述:OmniPower? LDO Linear Regulator |
| AAT3200IQY-2.3-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:OmniPower⑩ LDO Linear Regulator |
| AAT3200IQY-2.4-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:OmniPower LDO Linear Regulator |
| AAT3200IQY-2.5-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:OmniPower LDO Linear Regulator |
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