l4955 STMicroelectronics, l4955 Datasheet - Page 6

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

L4955
Figure 7: Short-circuit Current vs. Junction
3 .5
2 .5
1 .5
0 .5
Figure 9: Quiescent Current vs. Supply voltage
4 .5
3 .5
2 .5
1 .5
0 .5
Figure 11: Stand-by Current vs. Supply Voltage
4 0 0
3 5 0
3 0 0
2 5 0
2 0 0
1 5 0
1 0 0
6/14
I q [m A ]
Iq [u A ]
S h o r t- c ir c uit C u r r e nt [A ]
50
3
2
1
0
5
4
3
2
1
0
0
- 4 0 - 2 0
* P u ls ed te c ni q u e h as b e e n u s e d
0
0
Temperature with Programmable
Current Limiting
(CL = 0V)
with INH = LOGIC HIGH
0
5
5
I o = 1 0 m A t o 5 A
2 0
4 0
1 0
10
T j [ C ]
V i n [ V ]
V in [V ]
6 0
8 0 1 0 0 1 2 0 1 4 0 1 6 0
1 5
15
R lim = 4 7 k
T j= 2 5 C
R lim = 1 9 k
R lim = 1 3 k
T j= - 4 0 C
T j= 2 5 C
T j= 1 2 5 C
2 0
20
2 5
2 5
L4955
Figure 8: Quiescent Current vs. Temperature
2 .6
2 .4
2 .2
1 .8
1 .6
1 .4
1 .2
0 .8
0 .6
0 .4
Figure 10: Quiescent Current vs. Supply Voltage
Iq [mA]
4.5
3.5
2.5
1.5
0.5
Figure 12: Ripple Rejection vs. Frequency
1 0 0
Iq [m A ]
R i p p le R e je c tio n [d B ]
9 0
8 0
7 0
6 0
5 0
4 0
3 0
2 0
1 0
5
4
3
2
1
0
2
1
0
-4 0 - 2 0
0
1 0
Tj = 25 C
C in = 2 2 u F
C o u t = 2 2 u F
V o u t = 1 . 2 6 V
V in m in = 4 . 5 V
Io u t = 5 A
(CL = 0V)
V in = 1 2 V
Io u t =1 0 m A t o 5 A
with Programmable Current Limiting
0
5
1 0 0
V r ip p le = 3 V p - p
2 0
F r e q u e n c y [H z ]
Rli m = 13k
Rlim = 47k
4 0
10
T j [ C ]
Vin [V]
1 k
6 0
V r ip p le = 0 . 5 V p - p
8 0 1 0 0 1 2 0 1 4 0 1 6 0
15
1 0 k
20
1 0 0 k
25