3
LTC1642
1642fb
I
CR
CRWBR Pin Current
CRWBR On, V
CRWBR
= 0V
?SPAN class="pst LTC1642CGN-TRPBF_2348276_3">   30
45
60
礎
CRWBR On, V
CRWBR
= 2.1V
?SPAN class="pst LTC1642CGN-TRPBF_2348276_3">   1000
1500
礎
CRWBR Off, V
CRWBR
= 1.5V
2.3
mA
V
CB
Circuit Breaker Trip Voltage
V
CB
= (V
CC
V
SENSE
), V
FB
= GND
?/DIV>
15
25
36
mV
V
CB
= (V
CC
V
SENSE
), V
FB
= 1V
?/DIV>
45
52.5
60
mV
2.97V d V
CC
d 16.5V,
V
CB
= (V
CC
V
SENSE
), V
FB
= GND
?/DIV>
12
25
39
mV
V
CB
= (V
CC
V
SENSE
), V
FB
= 1V
?/DIV>
42
52.5
63
mV
I
SENSE
SENSE Pin Input Bias Current
V
CC
= V
SENSE
= 16.5V
?/DIV>
0.5
礎
I
GATE
GATE Pin Output Current
Charge Pump On, V
GATE
= GND
?/DIV>
20
25
30
礎
Charge Pump Off, V
GATE
= 5V
10
mA
V
GATE
External N-Channel Gate Drive
V
GATE
V
CC,
V
CC
= 2.97V
?/DIV>
4.5
5.9
8.0
V
V
GATE
V
CC,
V
CC
= 5V
?/DIV>
10
11.5
14
V
V
GATE
V
CC,
V
CC
= 15V
?/DIV>
4.5
8.5
18
V
V
ONHI
ON Pin Threshold
ON Rising
1.30
1.34
1.38
V
V
ONLO
ON Pin Threshold
ON Falling
?SPAN class="pst LTC1642CGN-TRPBF_2348276_3">    1.20
1.22
1.26
V
V
ONHYST
ON Pin Hysteresis
110
mV
I
ON(IN)
ON Pin Input Current
V
ON
= 5V
?/DIV>
0
?
礎
V
OL
Output Low Voltage
RESET, FAULT, COMPOUT I
OL
= 1.54mA  ?/SPAN>
0.4
V
RESET, FAULT I
O
= 5mA
2
V
I
PU
Logic Output Pull-Up Current
RESET, FAULT = GND
15
礎
V
REF
Reference Output Voltage
No Load
?SPAN class="pst LTC1642CGN-TRPBF_2348276_3">    1.208
1.220
1.232
V
V
LNR
Reference Supply Variation
2.97V d V
CC
d 16.5V, No Load
?/DIV>
5
15
mV
V
LDR
Reference Load Regulation
I
O
= 0mA to 1mA, Sourcing Only
?/DIV>
2.5
7.5
mV
I
RSC
Reference Short-Circuit Current
V
REF
= 0V
4.5
mA
V
COS
Comparator Offset Voltage
V
CM
= V
REF
?/DIV>
?0
mV
V
CHYST
Comparator Hysteresis
V
CM
= V
REF
3
mV
DC ELECTRICAL CHARACTERISTICS
The ?/SPAN> denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25?/SPAN>C.
V
CC
= 5V unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
TYPICAL PERFOR A CE CHARACTERISTICS
W
TEMPERATURE (癈)
50   25    0
25    50    75   100   125
1642 G03
16
14
12
10
8
6
4
2
0
V
CC
= 12V
V
CC
= 5V
V
CC
= 15V
V
CC
= 3V
V
GATE
vs Temperature
TEMPERATURE (癈)
50   25    0
25    50    75   100   125
1642 G04
30
29
28
27
26
25
24
23
22
21
20
V
GATE
= 0V
V
CC
= 3V
V
CC
= 5V
V
CC
= 12V
V
CC
= 15V
I
GATE
vs Temperature
V
CC
(V)
3
6
9
12
15
1642 G26
15
12
9
6
3
0
T
A
= 25癈
V
GATE
vs V
CC
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