TPS2148
TPS2158
SLVS373 – AUGUST 2001
TYPICAL CHARACTERISTICS
SHORT-CIRCUIT CURRENT, SWITCH
ENABLED INTO A SHORT
LDO TURNON DELAY AND RISE TIME
WITH 4.7-µF LOAD
V = 5 V
I
A
T
= 25°C
= 4.7 µF
= 13.2 Ω
C
R
V
L
L
I(EN)
(5 V/div)
V
I(LDO_EN)
(5 V/div)
V
O(LDO_OUT)
(1 V/div
I
O(OUT)
(100 mA/div)
0
1
2
3
4
5
6
7
8
9
10
0
0.4 0.8 1.2 1.6
t – Time – ms
2
2.4 2.8 3.2 3.6 4.2
t – Time – ms
Figure 6
LINE TRANSIENT RESPONSE
LOAD TRANSIENT RESPONSE
I
O(LDO_OUT)
(200 mA/div)
5.25 V
V
I(VIN)
4.25 V
∆V
O(LDO_OUT)
∆V
O(LDO_OUT)
(0.05 V/div)
(100 mV/div)
T
C
= 25°C
A
T
C
= 25°C
A
= 4.7 µF
L(LDO_OUT)
= 4.7 µF
L(LDO_OUT)
ESR = 1 Ω
ESR = 1 Ω
I
= 200 mA
O(LDO_OUT)
0
100 200 300 400
0
100 200 300 400
500 600 700 800 900
1000
500 600 700 800 900 1000
t – Time – µs
t – Time – µs
Figure 9
Figure 8
10
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