l4955 STMicroelectronics, l4955 Datasheet - Page 10

• Manufacturer Part Number: l4955
• Description: 5a Uldo Linear Regulators Family
• Manufacturer: STMicroelectronics

L4955
Figure 23: DC operating area.
8
7
6
5
4
3
2
1
0
Figure 25: Quiescent Current vs. Temperature.
Iq [m A]
2 .7 5
2 .2 5
1 .7 5
1 .2 5
0 .7 5
0 .2 5
Figure 27: Line regulation vs. Junction Tempera-
10/14
O utput Current [A]
2 .5
1 .5
0 .5
3
4.5
3.5
2.5
1.5
0.5
3
2
1
0
-4 0
5
4
3
2
1
0
4.5
-40
Current Lim itation
Rdson
lim it
-2 0
V in= 5 V
I ou t = 10 m A to 5 A
4.5 V < V in < 12 V
6
Io u t = 1 0 m A
-2 0
DC O perating Area
7.5
ture.
0
0
9 10.5 12 13.5 15 16.5 18 19.5 21 22.5
2 0
Input Voltage [V]
20
4 0
40
T j [ C ]
T j [ C ]
Power Dissipation Lim it
6 0
60
8 0
80
T c=70 C
Pdm ax=22W
T c = 25 C
Pdm ax=40W
1 00
10 0 1 20
Vout = 3.3V
T j = 125 C
1 2 0
1 40
1 40
L4955V3.3
1 6 0
160
Figure 24: Output Voltage Stability vs. Junction
3 .35
3 .25
Figure 26: Load Regulation
Figure 28: MaximumOutput Current vs.Junction
O utput C urrent [A]
Vo ut [V ]
3 .4
3 .3
3 .2
10
9
8
7
6
5
4
3
2
1
0
*P ulsed tecnique ha s been used
-1
-2
-3
-4
-5
-40 -20
-4 0
5
4
3
2
1
0
0
Vin=5V
Tj = 25 C
(Pulsed tecnique has been used)
(Vin-Vout) > 2V
pin 2 = G ND
Temperature.
Temperaturewith internalcurrent limiting
0
0
1
20
40
4 0
2
Tj [ C]
Iout [A]
T j [ C ]
60
V in = 5V
Iou t = 1 0mA
80 100 120 140 160
8 0
3
1 2 0
4
1 60
5