TPS2149
TPS2159
SLVS401 – AUGUST 2001
PARAMETER MEASUREMENT INFORMATION
50%
50%
V
I(ENx)
t
t
pd(off)
on
pd(on)
t
t
off
90%
10%
90%
10%
V
V
O(OUTx)
t
t
f
r
90%
10%
90%
10%
O(OUTx)
TIMING
Figure 1. Timing and Internal Voltage Regulator Transition Waveforms
TYPICAL CHARACTERISTICS
SWITCH TURNON DELAY AND RISE TIME
SWITCH TURNOFF DELAY AND FALL TIME
WITH 1-µF LOAD
WITH 1-µF LOAD
V
I(EN)
(5 V/div)
V
I(EN)
(5 V/div)
V
O(OUT)
(2 V/div)
V
O(OUT)
(2 V/div)
V = 5 V
V = 5 V
I
T
= 25°C
= 1 µF
= 25 Ω
T
= 25°C
= 1 µF
= 25 Ω
A
L
L
C
R
0
0.4 0.8 1.2 1.6
t – Time – ms
0
0.4 0.8 1.2 1.6
t – Time – ms
2
2.4 2.8 3.2 3.6 4.2
2
2.4 2.8 3.2 3.6 4.2
Figure 2
Figure 3
8
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