L4955 데이터 시트보기 (PDF) - STMicroelectronics
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L4955 Datasheet PDF : 14 Pages
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L4955
L4955V5.1
Figure 29: DC operating area.
O ut put C u rr e nt [A ]
8
7
C u rre nt L im itatio n
6
Rd son
5
lim it
Vout = 5.1V
Tj = 125°C
Pow er D issip a tio n Lim it
Figure 30: Output Voltage Stability vs. Junction
Temperature.
Vout [V]
5.2
5.15
V in = 8V
Iout = 10mA
5.1
4
3
DC O pe ratin g A re a
2
Tc = 25°C
Pdmax = 40W
5.05
5
4.95
1
Tc = 70°C
Pdm ax = 22W
0
4.9
0
2.5
5
7.5
10
12.5
15
1 7 .5
-4 0
0
40
80
120
160
(V in - Vou t) [V ]
T j [°C ]
Figure 31: Quiescent Current vs. Temperature.
Figure 32: Load Regulation
Iq [mA]
3
2 .75
2 .5
2 .25
2
1 .75
1 .5
1 .25
1
0 .75
0 .5
0 .25
Vin = 8V
Iout = 10mA to 5A
0
-40 -20 0 20 40 60 80
T j [°C]
100 120 140 160
Figure 33: Line regulation vs. Junction Tempera-
ture.
5
4.5
4 6.5V < Vin < 15V
3.5 Iout = 10mA
3
2.5
2
1.5
1
0.5
0
-40 -20 0 20 40 60 80 100 120 140 160
Tj [°C]
10
8
6
4
2
0
-2
-4
Vin = 8V
-6
Tj = 25 °C
(P uls e d tec n iq u e h as be en us ed )
-8
-10
0
1
2
3
4
5
Io u t [A]
Figure 34: Maximum OutputCurrent vs. Junction
Temperaturewith internalcurrent limiting
O utput Current [A]
10
9
8
7
6
5
4
(Vin-Vout) > 2V
3
pin 2 = GND
2
1
0
-40 -20 0 20 40 60 80 100 120 140 160
Tj [°C]
*Pulsed tecnique has been used
11/14
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