LTC2931
5
2931fb
TEMPERATURE (°C)
–50
NORMALIZED THRESHOLD VOLTAGES (V/V)
1.005
1.010
1.015
25 75
2931 G01
1.000
0.995
–25 0
50 100 125
0.990
0.985
TEMPERATURE (oC)
–50
THRESHOLD VOLTAGE, V
RTAN
(mV)
6
12
18
25 75
2931 G02
0
–6
–25 0
50 100 125
–12
–18
TEMPERATURE (°C)
–50
V
REF
(V)
1.216
1.222
1.228
25 75
2931 G03
1.210
1.204
–25 0
50 100 125
1.198
1.192
TEMPERATURE (oC)
–50
SUPPLY CURRENT, I
V1
(MA)
60
65
70
25 75
2931 G04
55
50
–25 0
50 100 125
45
40
V1 = 5V
V2 = 3.3V
V3 = 2.5V
V4 = 1.8V
V5 = V6 = 1V
V4 (mV)
I
V4
(A)
2931 G05
–100μ
–10μ
–1μ
–100n
–10n
–1n
–100p
–300
125°C
90°C
25°C
–250 –200 –50 0–100–150
RESET COMPARATOR OVERDRIVE (% OF V
RTX
)
0.1
0
TYPICAL TRANSIENT DURATION (Ms)
200
250
300
1 10 100
2931 G06
150
100
50
T
A
= 25oC
RESET OCCURS ABOVE CURVE
RESET COMPARATOR OVERDRIVE (% OF V
RTX
)
0.1
0
TYPICAL TRANSIENT DURATION (Ms)
300
375
450
1 10 100
2931 G07
225
150
75
T
A
= 25oC
RESET OCCURS ABOVE CURVE
V1 (V)
0
0
RST OUTPUT VOLTAGE (V)
1
2
3
4
5
6
1234
2931 G08
5
T
A
= 25oC
10k PULL-UP FROM RST TO V1
TEMPERATURE (oC)
–50
WATCHDOG TIMEOUT PERIOD, t
WD
(ms)
32
34
36
25 75
2931 G09
30
28
–25 0
50 100 125
26
24
C
WT
= 1500pF
(SILVER MICA)
TYPICAL PERFORMANCE CHARACTERISTICS
Normalized Threshold Voltages
vs Temperature
–ADJ Threshold Voltage
vs Temperature V
REF
vs Temperature
Supply Current vs Temperature
Transient Duration vs Comparator
Overdrive (V1,V2)
Transient Duration vs Comparator
Overdrive (V3, V4, V5, V6)
RST Output Voltage vs V1,
V
PG
= GND
Watchdog Timeout Period
vs Temperature
I(V4) vs V4 in Negative
Adjust Mode
