Datasheet

LTC4211
3
4211fb
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
= 5V, unless otherwise noted. (Note 2)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
INON
ON Input Current V
ON
= V
CC
or GND ±1 ±10 μA
I
LEAK
RESET, FAULT Leakage Current V
RESET
= V
FAULT
= 15V, Pull-Down Device Off
l
±0.1 ±2.5 μA
I
INSENSE
SENSE Input Current V
SENSE
= V
CC
or GND ±1 ±10 μA
V
CB(FAST)
SENSE Trip Voltage (V
CC
– V
SENSE
) Fast Comparator Trips
l
130 150 170 mV
V
CB(SLOW)
SENSE Trip Voltage (V
CC
– V
SENSE
) Slow Comparator Trips
l
40 50 60 mV
I
GATEUP
GATE Pull-Up Current Charge Pump On, V
GATE
≤ 0.2V
l
–12.5 –10 –7.5 μA
I
GATEDOWN
Normal GATE Pull-Down Current ON Low
l
130 200 270 μA
Fast GATE Pull-Down Current FAULT Latched and Circuit Breaker Tripped or in
UVLO
50 mA
ΔV
GATE
External N-Channel Gate Drive V
GATE
– V
CC
(For V
CC
= 2.5V)
V
GATE
– V
CC
(For V
CC
= 2.7V)
V
GATE
– V
CC
(For V
CC
= 3.3V)
V
GATE
– V
CC
(For V
CC
= 5V)
V
GATE
– V
CC
(For V
CC
= 12V)
V
GATE
– V
CC
(For V
CC
= 15V)
l
l
l
l
l
l
2.5
4.5
5.0
10
10
8
8
8
10
16
18
18
V
V
V
V
V
V
V
GATEOV
GATE Overvoltage Lockout Threshold
l
0.08 0.2 0.3 V
V
FB
FB Voltage Threshold FB High to Low
l
1.223 1.236 1.248 V
ΔV
FB
FB Threshold Line Regulation 2.5V ≤ V
CC
≤ 16.5V
l
0.5 5 mV
V
FBHST
FB Voltage Threshold Hysteresis 3mV
V
ONHI
ON Threshold High
l
1.23 1.316 1.39 V
V
ONLO
ON Threshold Low
l
1.20 1.236 1.26 V
V
ONHST
ON Hysteresis 80 mV
I
FILTER
FILTER Current During Slow Fault Condition
l
–2.5 –2 –1.5 μA
During Normal and Reset Conditions
l
71013 μA
V
FILTER
FILTER Threshold Latched Off Threshold, FILTER Low to High
l
1.20 1.236 1.26 V
V
FILTERHST
FILTER Threshold Hysteresis 80 mV
I
TMR
TIMER Current Timer On, V
TIMER
= 1V
l
–2.5 –2 –1.5 μA
Timer Off, TIMER = 1.5V 3 mA
V
TMR
TIMER Threshold TIMER Low to High
l
1.20 1.236 1.26 V
TIMER High to Low
l
0.15 0.200 0.40 V
V
FAULT
FAULT Threshold Latched Off Threshold, FAULT High to Low
l
1.20 1.236 1.26 V
V
FAULTHST
FAULT Threshold Hysteresis 50 mV
V
OLFAULT
Output Low Voltage I
FAULT
= 1.6mA
l
0.14 0.4 V
V
OLRESET
Output Low Voltage I
RESET
= 1.6mA
l
0.14 0.4 V
t
FAULTFC
FAST COMP Trip to GATE Discharging V
CB
= 0mV to 200mV Step
l
300 700 ns
t
FAULTSC
SLOW COMP Trip to GATE Discharging V
CB
= 0mV to 100mV Step,
8-Pin Version or FILTER Floating
l
10 20 30 μs
V
CB
= 0mV to 100mV Step,
10nF at FILTER Pin to GND
l
468 ms
t
EXTFAULT
FAULT Low to GATE Discharging V
FAULT
= 5V to 0V
l
135 μs
t
FILTER
FILTER High to FAULT Latched V
FILTER
= 0V to 5V
l
2 4.5 7 μs