l4957a STMicroelectronics, l4957a Datasheet - Page 7

• Manufacturer Part Number: l4957a
• Description: Up To 5a Uldo Linear Regulator
• Manufacturer: STMicroelectronics

L4957A
Figure 4.
Figure 6.
O u tp u t C u rre n t [A ]
4 .5
3 .5
2 .5
1 .5
0 .5
1 0
9
8
7
6
5
4
3
2
1
0
* P u ls e d te c n iq u e h a s b e e n u s e d
5
4
3
2
1
0
-4 0 -2 0
-4 0 -2 0
(V in -V o u t) > 2 V
p in 2 = G N D
Line regulation vs. junction
temperature
Maximum output current vs.
junction temperature
0
0
2 0 4 0 6 0 8 0 1 0 0 1 2 0 1 4 0 1 6 0
2 0
4 0
T j [° C ]
T j [° C ]
3 V < V in < 6 .5 V
Io u t = 1 0 m A
6 0
8 0 1 0 0 1 2 0 1 4 0 1 6 0
Figure 5.
Figure 7.
O u tp u t C u r re n t [A ]
8
7
6
5
4
3
2
1
0
-1
-2
-3
-4
-5
0
5
4
3
2
1
0
0
V in > 2 .8 V
T j= 1 2 5 ° C
R d s o n
lim it
1
Load regulation
DC operating area
1
2
C u rre n t L im ita tio n
D C O p e ra tin g A re a
( P u ls e d te c h n iq u e h a s b e e n u s e d )
(V in - V o u t) [V ]
3
Electrical characteristics
2
Io u t [A ]
V o u t = 1 .5 V
4
P o w e r D issip a tio n L im it
V in = 5 V
T j = 2 5 °C
T c = 7 0 ° C
P d m a x = 2 2 W
5
3
6
T c =2 5 ° C
P d m a x = 4 0 W
4
7
8
7/12
5