Datasheet
3
LTC1642
1642fb
I
CR
CRWBR Pin Current CRWBR On, V
CRWBR
= 0V ● –30 –45 –60 µA
CRWBR On, V
CRWBR
= 2.1V ● –1000 –1500 µA
CRWBR Off, V
CRWBR
= 1.5V 2.3 mA
V
CB
Circuit Breaker Trip Voltage V
CB
= (V
CC
– V
SENSE
), V
FB
= GND ● 15 25 36 mV
V
CB
= (V
CC
– V
SENSE
), V
FB
= 1V ● 45 52.5 60 mV
2.97V ≤ V
CC
≤ 16.5V,
V
CB
= (V
CC
– V
SENSE
), V
FB
= GND ● 12 25 39 mV
V
CB
= (V
CC
– V
SENSE
), V
FB
= 1V ● 42 52.5 63 mV
I
SENSE
SENSE Pin Input Bias Current V
CC
= V
SENSE
= 16.5V ● 0.5 µA
I
GATE
GATE Pin Output Current Charge Pump On, V
GATE
= GND ● –20 –25 –30 µA
Charge Pump Off, V
GATE
= 5V 10 mA
∆V
GATE
External N-Channel Gate Drive V
GATE
– V
CC,
V
CC
= 2.97V ● 4.5 5.9 8.0 V
V
GATE
– V
CC,
V
CC
= 5V ● 10 11.5 14 V
V
GATE
– V
CC,
V
CC
= 15V ● 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 ● 1.20 1.22 1.26 V
V
ONHYST
ON Pin Hysteresis 110 mV
I
ON(IN)
ON Pin Input Current V
ON
= 5V ● 0 ±1 µA
V
OL
Output Low Voltage RESET, FAULT, COMPOUT I
OL
= 1.54mA ● 0.4 V
RESET, FAULT I
O
= 5mA 2 V
I
PU
Logic Output Pull-Up Current RESET, FAULT = GND – 15 µA
V
REF
Reference Output Voltage No Load ● 1.208 1.220 1.232 V
∆V
LNR
Reference Supply Variation 2.97V ≤ V
CC
≤ 16.5V, No Load ● 515 mV
∆V
LDR
Reference Load Regulation I
O
= 0mA to –1mA, Sourcing Only ● 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
● ±10 mV
V
CHYST
Comparator Hysteresis V
CM
= V
REF
3mV
DC ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°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
UW
TEMPERATURE (°C)
–50 –25 0 25 50 75 100 125
∆V
GATE
(V)
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 (°C)
–50 –25 0 25 50 75 100 125
I
GATE
(µA)
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
∆V
GATE
(V)
1642 G26
15
12
9
6
3
0
T
A
= 25°C
∆V
GATE
vs V
CC