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參數(shù)資料
| 型號： | L4957AV1.8 |
| 廠商： | 意法半導體 |
| 英文描述： | UP TO 5A ULDO LINEAR REGULATOR |
| 中文描述： | 高達5A ULDO線性穩(wěn)壓器 |
| 文件頁數(shù)： | 4/7頁 |
| 文件大?。?/td> | 63K |
| 代理商： | L4957AV1.8 |
*Pulsed tecnique has been used
-40
-20
0
20
40
60
80
100 120 140 160
0
1
2
3
4
5
6
7
8
9
10
Tj [
°
C]
Output Current [A]
(Vin-Vout) > 2V
pin 2 = GND
Figure 3:
MaximumOutputCurrentvs.Junction
Temperature
Vin>2.8 V
Tj=1 25C
Tc=25
°
C
Pdmax= 40 W
Rdson
limit
D C Operating Area
Power Dissipation Limit
Current Lim itation
Tc=70
C
P dmax= 22 W
0
1
2
3
4
5
6
7
8
0
1
2
3
4
5
6
7
8
(Vin - Vout) [V]
Output Current [A]
Figure 4:
DC OperatingArea
0
10
20
30
40
50
60
70
80
90
1 00
F req u 1 k
R ip ple R ejec tion [d B ]
10
1 00
10 k
1 00k
Vrip ple= 3V p-p V ripple = 0.5 Vp-p
C in= 2 2u F
C ou t=2 2u F
Vou t= 1 .5V
Vin m in = 3V
Io ut= 5A
Figure 5:
RippleRejection vs. Frequency
6.3
IOUT(A)
V
OUT
(V)
D00IN1109
Figure 6:
Output Voltagevs. OutputCurrent.
(V
OUT
= 1.5V)
0
0.2 0.4
0.6 0.8
1
1.2 1.4
1.6 1.8
V = V in - Vo
2
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
Io
[A]
ma ximum Ron limits
Tj = 1 00
°
C
Tj = 1 25
°
C
Tj = 25
°
C
Figure7:
Maximum OutputCurrentvs. Drop-Out
Voltage
L4957A
4/7
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