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參數(shù)資料
| 型號： | AAT3220IGY-2.4-T1 |
| 廠商： | Advanced Analog Technology,lnc. |
| 英文描述： | 150mA NanoPower⑩ LDO Linear Regulator |
| 中文描述： | 150mA的NanoPower⑩LDO線性穩(wěn)壓器 |
| 文件頁數(shù)： | 12/16頁 |
| 文件大小： | 194K |
| 代理商： | AAT3220IGY-2.4-T1 |
AAT3220
150mA NanoPower LDO Linear Regulator
12
3220.2006.01.1.4
From the discussion above, P
D(MAX)
was deter-
mined to equal 200mW at T
A
= 85°C.
Higher input-to-output voltage differentials can be
obtained with the AAT3220 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 150mAoutput current and a 2.0V drop across
the AAT3220 at an ambient temperature of 85°C,
the maximum on-time duty cycle for the device
would be 66.67%.
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
100mA
150mA
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
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
= 1.1μA
I
OUT
= 150mA
V
IN
= 5.0V
V
OUT
= 3.0V
%DC = 66.67%
P
D(MAX)
(V
IN
- V
OUT
)I
OUT
+ (V
IN
×
I
GND
)
%DC = 100
200mW
(5.0V - 3.0V)150mA + (5.0V
×
1.1
μ
A)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT3220IGY-24-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:150mA NanoPower⑩ LDO Linear Regulator |
| AAT3220IGY-25-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:150mA NanoPower⑩ LDO Linear Regulator |
| AAT3220IGY-27-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:150mA NanoPower⑩ LDO Linear Regulator |
| AAT3220IGY-285-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:150mA NanoPower⑩ LDO Linear Regulator |
| AAT3220IGY-28-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:150mA NanoPower⑩ LDO Linear Regulator |
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