Datasheet

10
8
6
4
2
0
10 30 50 70 90 110 130
Temperature (°C)
−50 −30 −10
−10
−8
−6
−4
−2
Normalized RESET Timeout Period (%)
100
10
1
0 5 10 15 20 30 35 4525
Overdrive (%V
IT
)
5040
Transient Duration below V
IT
(µs)
RESET OCCURS
ABOVE THE CURVE
100
10
1
0.1
0.01
0.001
0.0001 0.001 0.01 0.1
C
T
(
µ
F)
101
−40°C, 25°C, 125°C
RESET Timeout (sec)
0 1 2 3 4 5 6 7
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
−40
_
C
25
_
C
85
_
C
125
_
C
I
DD
(µA)
V
DD
(V)
TPS3808-Q1
SBVS085H –JANUARY 2007–REVISED JUNE 2012 www.ti.com
TYPICAL CHARACTERISTICS
At T
J
= 25°C, V
DD
= 3.3 V, R
LRESET
= 100 kΩ, and C
LRESET
= 50 pF (unless otherwise noted)
SUPPLY CURRENT RESET TIMEOUT PERIOD
vs vs
SUPPLY VOLTAGE C
T
Figure 2. Figure 3.
NORMALIZED RESET TIMEOUT PERIOD
vs MAXIMUM TRANSIENT DURATION AT SENSE
TEMPERATURE vs
(C
T
= OPEN, C
T
= V
DD
, C
T
= Any) SENSE THRESHOLD OVERDRIVE VOLTAGE
Figure 4. Figure 5.
6 Copyright © 2007–2012, Texas Instruments Incorporated