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參數(shù)資料
| 型號(hào)： | AAT3221IGV-33-T1 |
| 廠商： | Advanced Analogic Technologies, Inc. |
| 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(yè)數(shù)： | 12/16頁(yè) |
| 文件大?。?/td> | 390K |
| 代理商： | AAT3221IGV-33-T1 |
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AAT3221/2
150mA NanoPower LDO Linear Regulator
12
3221.200
2
.
03
.0.9
4
High Peak Output Current Applications
Some applications require the LDO regulator to
operate at continuous nominal levels with short
duration high current peaks. The duty cycles for
both output current levels must be taken into
account. To do so, one would first need to calcu-
late the power dissipation at the nominal continu-
ous level, then factor in the addition power dissipa-
tion due to the short duration high current peaks.
For example, a 2.5V system using a AAT3221/
2IGV-2.5-T1 operates at a continuous 100mA load
current level and has short 150mA current peaks.
The current peak occurs for 378μs out of a 4.61ms
period. It will be assumed the input voltage is 5.0V.
First, the current duty cycle percentage must be
calculated:
% Peak Duty Cycle: X/100 = 378ms/4.61ms
% Peak Duty Cycle = 8.2%
The LDO Regulator will be under the 100mA load
for 91.8% of the 4.61ms period and have 150mA
peaks occurring for 8.2% of the time. Next, the
continuous nominal power dissipation for the
100mA load should be determined then multiplied
by the duty cycle to conclude the actual power dis-
sipation over time.
P
D(MAX)
= (V
IN
- V
OUT
)I
OUT
+ (V
IN
x I
GND
)
P
D(100mA)
= (5.0V - 2.5V)100mA + (5.0V x 1.1mA)
P
D(100mA)
= 250mW
P
D(91.8%D/C)
= %DC x P
D(100mA)
P
D(91.8%D/C)
= 0.918 x 250mW
P
D(91.8%D/C)
= 229.5mW
Device Duty Cycle vs. V
DROP
V
OUT
= 2.5V @ 85 degrees 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 degrees 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 degrees 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 |
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| AAT3221IGV-24-T1 | 150mA NanoPower⑩ LDO Linear Regulator |
| AAT3221IGV-25-T1 | 150mA NanoPower⑩ LDO Linear Regulator |
| AAT3221IGV-28-T1 | 150mA NanoPower⑩ LDO Linear Regulator |
| AAT3222IGV-20-T1 | 150mA NanoPower⑩ LDO Linear Regulator |
| AAT3221 | 150mA NanoPower⑩ LDO Linear Regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT3221IGV-35-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:150mA NanoPower⑩ LDO Linear Regulator |
| AAT3221IJS-1.5-T1 | 制造商:Advanced Analogic Tech 功能描述:AAT3221 Series 1.5 V 150 mA NanoPower LDO Linear Regulator - SC-70JW-8 制造商:SKYWORKS SOLUTIONS 功能描述:AAT3221 Series 1.5 V 150 mA NanoPower LDO Linear Regulator - SC-70JW-8 制造商:Skyworks Solutions Inc 功能描述:VOLTAGE REGULATOR |
| AAT3221IJS-1.6-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:150mA NanoPower? LDO Linear Regulator |
| AAT3221IJS-1.7-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:150mA NanoPower⑩ LDO Linear Regulator |
| AAT3221IJS-1.8-T1 | 功能描述:低壓差穩(wěn)壓器 - LDO 150mA NanoPower LDO Linear Regulator RoHS:否 制造商:Micrel 最大輸入電壓:5.5 V 輸出電壓:3.1 V 回動(dòng)電壓（最大值）:160 mV 輸出電流:300 mA 負(fù)載調(diào)節(jié): 輸出端數(shù)量:1 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DFN-4 |
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