LTC4226
3
4226f
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C, V
CC
= 12V.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Supplies
V
CCn
Input Supply Range
l
4.5 44 V
I
CCn
Input Supply Current V
CC
= 12V
l
0.7 2 mA
V
CCn(UVL)
Input Supply Undervoltage Lockout V
CC
Rising
l
3 3.7 4.5 V
∆V
CCn(HYST)
Input Supply Undervoltage Lockout Hysteresis 200 mV
Circuit Breaker and Current Limit
V
CB
Circuit Breaker Threshold (V
CC
– SENSE)
l
45 50 55 mV
Channel-to-Channel V
CB
Mismatch
l
±6 %
V
LIMIT
Current Limit Voltage (V
CC
– SENSE), CLS = 0V
(V
CC
– SENSE), CLS = Open
(V
CC
– SENSE), CLS = 3V
l
l
l
70
93
139
86
115
173
103
136
205
mV
mV
mV
Channel-to-Channel V
LIMIT
Mismatch
l
±6 %
I
SENSE
Sense Pin Input Current (V
CC
– SENSE = 0V)
l
40 200 µA
Gate Drive
∆V
GATE
External N-Channel Gate Drive (GATE – OUT) I
GATE
= 0µA, –1µA; V
CC
> 6V
I
GATE
= 0µA, –1µA; V
CC
< 6V
l
l
10
8
12
12
16
16
V
V
I
GATE(UP)
Gate Pull-Up Current GATE = OUT = 1V
l
–5 –9 –13 µA
I
GATE(DN)
Gate Pull-Down Current GATE = 12V, OUT = 0V, ON = 0V
GATE = OUT = V
CC
= 12V, ON = 0V or FAULT = 0V
GATE = 5V, OUT = 0V, ON = 3V, Severe Fault
l
l
l
1
50
100
3
150
200
5
300
1000
mA
µA
mA
Comparator Inputs
V
ON
ON Pin Threshold Voltage V
ON
Rising
l
1.17 1.24 1.3 V
∆V
ON(HYST)
ON Pin Hysteresis Voltage 50 mV
I
ON
ON Pin Input Current V
ON
= 1.2V
l
0 ±1 µA
Fault Timer
I
FTMR(CB)
FTMR Pin Pull-Up Current (Circuit Breaker) V
FTMR
= 0V, Circuit Breaker Fault
l
–1.4 –2 –2.6 µA
I
FTMR(CL)
FTMR Pin Pull-Up Current (Current Limit) V
FTMR
= 0V, Current Limit Engaged, CLS = 0V
V
FTMR
= 0V, Current Limit Engaged, CLS = Open
V
FTMR
= 0V, Current Limit Engaged, CLS = 3V
l
l
l
–14
–25
–56
–20
–36
–80
–26
–46
–104
µA
µA
µA
I
FTMR(DEF)
FTMR Pin Pull-Down Current (Default) V
FTMR
= 1V, Default
l
1.4 2 2.6 µA
I
FTMR(RST)
FTMR Pin Pull-Down Current (Reset) V
FTMR
= 1V, Reset
l
70 100 130 µA
V
FTMR(H)
FTMR Pin Threshold Voltage (Trip)
l
1.17 1.23 1.3 V
V
FTMR(L)
FTMR Pin Threshold Voltage (Reset)
l
0.1 0.2 V
Fault I/O
V
(OL)
FAULT Pin Low Output Voltage Circuit Breaker Fault, I
FAULT
= 2mA
l
0.2 0.4 V
I
(OL)
FAULT Pin Low Output Pull-Down Current Circuit Breaker Fault, V
FAULT
= 5V, V
CC
= 12V
l
2 5 10 mA
V
FAULT
FAULT Pin Input Threshold Voltage No Internal Fault, External Input
l
0.3 0.5 0.8 V
I
(OH)
FAULT Pin Pull-Up Current No Internal Fault, V
FAULT
= 2V
l
–5 –10 –20 µA
V
(OH)
FAULT Pin High Output Voltage No Internal Fault, I
FAULT
= 0µA, V
CC
= 12V
l
2 3.8 5 V
