LT4356-3
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 unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Δ V TMR
V IN+
I IN+
V OL
I OUT
Δ V OUT
V SHDN
Early Warning Period
IN + Pin Threshold
IN + Pin Input Current
FLT , EN, A OUT Pins Output Low
OUT Pin Input Current
OUT Pin High Threshold
SHDN Pin Threshold
From FLT going Low to GATE going Low, V CC = 5V to 80V
V IN + = 1.25V
I SINK = 2mA
I SINK = 0.1mA
V OUT = V CC = 12V; LT4356C, LT4356I, LT4356H
V OUT = V CC = 12V; LT4356MP
V OUT = V CC = 12V, V SHDN = 0V
Δ V OUT = V CC – V OUT ; EN From Low to High
V CC = 12V to 48V
l
l
l
l
l
l
l
l
l
l
80
1.22
0.25
0.6
0.4
100
1.25
0.3
2
300
200
200
6
0.5
1.4
120
1.28
1
8
800
300
310
14
0.7
1.7
2.1
mV
V
μA
V
mV
μA
μA
mA
V
V
V
V SHDN (FLT) SHDN Pin Float Voltage
V CC = 12V to 48V
l
0.6
1.2
2.1
V
I SHDN
t OFF(OC )
t OFF(OV)
SHDN Pin Current
Overcurrent Turn Off Delay Time
Overvoltage Turn Off Delay Time
V SHDN = 0V
GATE From High to Low, Δ V SNS = 0 → 120mV; LT4356C,
LT4356I, LT4356H
LT4356MP
GATE From High to Low, V FB = 0 → 1.5V
l
l
l
l
–1
–4
2
2
0.25
–8
4
4.5
1
μA
μs
μs
μs
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 3: An internal clamp limits the GATE pin to a minimum of 10V above
the OUT pin. Driving this pin to voltages beyond the clamp may damage
the device.
Note 2: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to GND unless otherwise
specified.
TYPICAL PERFORMANCE CHARACTERISTICS
Specifications are at V CC = 12V, T A = 25°C unless otherwise noted.
1000
800
600
I CC vs V CC
60
50
40
30
I CC (Shutdown) vs V CC
35
30
25
20
I CC (Shutdown) vs Temperature
400
20
15
10
200
10
5
0
0
10
20
30
40
50
60
70
80
0
0
10
20
30
40
50
60
70
80
0
–50
–25
0
25
50
75
100
125
V CC (V)
43563 G02
V CC (V)
43563 G01
TEMPERATURE (°C)
43563 G03
43563fb
4
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