LT4356 Linear Technology Corporation, LT4356 Datasheet - Page 3

• Manufacturer Part Number: LT4356
• Description: Overvoltage Protection Regulator And Inrush Limiter
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifi cations are at T
SYMBOL
V
I
I
ΔV
I
I
V
I
ΔV
I
I
I
V
ΔV
V
I
V
I
ΔV
V
V
I
t
t
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 2: All currents into device pins are positive; all currents out of device
CC
R
GATE,UP
GATE,DN
FB
SNS
LEAK
TMR
IN
OUT
SHDN
OFF(OC
OFF(OV)
TMR
CC
FB
IN
OL
SHDN
SHDN(FLT)
TMR
+
GATE
SNS
OUT
+
)
PARAMETER
Operating Voltage Range
V
Reverse Input Current
GATE Pin Output High Voltage
GATE Pin Pull-Up Current
GATE Pin Pull-Down Current
FB Pin Servo Voltage
FB Pin Input Current
Overcurrent Fault Threshold
SNS Pin Input Current
FLT, EN Pins Leakage Current
A
TMR Pin Pull-up Current
TMR Pin Pull-down Current
TMR Pin Thresholds
Early Warning Period
IN
IN
FLT, EN, A
OUT Pin Input Current
OUT Pin High Threshold
SHDN Pin Threshold
SHDN Pin Float Voltage
SHDN Pin Current
Overcurrent Turn Off Delay Time
Overvoltage Turn Off Delay Time
CC
OUT
+
+
Pin Threshold
Pin Input Current
Supply Current
Pin Leakage Current
OUT
Pins Output Low
CONDITIONS
V
V
LT4356I-1, LT4356C-1
LT4356H-1
V
V
V
48V ≥ V
V
V
Overvoltage, V
Overcurrent, V
Shutdown Mode, V
V
V
V
ΔV
ΔV
ΔV
ΔV
V
FLT, EN = 80V
A
V
V
V
V
V
V
FLT From High to Low, V
V
From FLT going Low to GATE going Low, V
V
I
I
V
V
ΔV
V
V
V
GATE From High to Low, ΔV
GATE From High to Low, V
SINK
SINK
SHDN
SHDN
SNS
SNS
CC
GATE
GATE
GATE
GATE
FB
SNS
OUT
TMR
TMR
TMR
TMR
TMR
TMR
GATE
IN
OUT
OUT
CC
CC
SHDN
SNS
SNS
SNS
SNS
OUT
+
= 1.25V
= 4V; (V
= 12V to 48V
= 12V to 48V
= 1.25V
= 2mA
= 0.1mA
= V
= V
= V
= 80V
= V
= V
= 1V, V
= 1V, V
= 1.3V, V
= 1V, ΔV
= 1V, ΔV
= 1V, V
= 12V; V
= 48V; V
= 12V; V
= 12V; V
From Low to High, V
= FLOAT
= 0V
= (V
= (V
= (V
= (V
= V
= 0V
CC
CC
CC
CC
CC
CC
CC
A
≥ 8V; (V
CC
CC
CC
CC
= –30V, SHDN Open
= V
= 12V to 48V
= 12V
= 12V, V
GATE
= 25°C. V
FB
FB
FB
– V
– V
– V
– V
– V
SNS
SNS
FB
CC
FB
CC
CC
OUT
OUT
SHDN
= 1.5V, (V
= 1.5V, (V
= 1V, ΔV
OUT
SNS
SNS
SNS
SNS
– V
= 1.4V, V
– V
= 1.5V
= 12V
= 48V
The
= 60mV, (V
= 60mV, (V
= 12V, LT4356I-1, LT4356C-1
= 12V, LT4356H-1
GATE
SHDN
; EN From Low to High
SHDN
= –30V
SNS
), V
), V
), V
), V
OUT
l
CC
– V
SNS
CC
CC
CC
CC
)
CC
= 0V, V
= 120mV, V
CC
CC
denotes the specifi cations which apply over the full operating
= 0V
GATE
FB
= 12V unless otherwise noted.
= 12V, LT4356I-1, LT4356C-1
= 12V, LT4356H-1
= 48V, LT4356I-1, LT4356C-1
= 48V, LT4356H-1
CC
OUT
= 5V to 80V
SNS
= 0V
– V
– V
= 0 → 1.5V
CC
CC
= 5V to 80V
)
pins are negative. All voltages are referenced to GND unless otherwise
specifi ed.
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.
= 12V
GATE
OUT
OUT
= 0 → 120mV
– V
– V
) = 0.5V
) = 75V
OUT
OUT
GATE
= 12V
) = 0.5V
) = 80V
= 12V
CC
= 5V to 80V
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
1.225
1.215
–195
–4.5
MIN
42.5
–1.5
–3.5
–2.5
1.22
0.48
1.22
0.25
–44
4.5
1.5
1.7
0.6
0.4
–4
10
75
45
46
43
80
–1
4
5
5
–260
1.25
1.25
–2.5
–5.5
–4.5
1.25
1.25
0.25
–23
–30
TYP
150
–50
100
300
200
0.3
0.8
0.3
2.2
0.5
0.3
0.5
1.4
1.7
10
50
50
51
51
10
–4
1
7
7
7
5
2
6
2
LT4356-1
1.275
1.275
–315
MAX
–6.5
1.28
0.52
1.28
–36
–50
–55
120
800
300
1.5
2.5
4.5
2.7
0.7
1.7
2.1
2.2
80
25
30
40
18
55
55
56
56
22
–4
–8
12
–8
1
2
8
1
1
8
4
1
UNITS
43561fd
3
mA
mA
mA
mA
mA
mA
mV
mV
mV
mV
mV
mV
mA
μA
μA
μA
μA
μA
μA
μA
μA
μA
μA
μA
μA
μA
μA
μA
μA
μA
μA
μs
μs
V
V
V
V
V
V
V
V
V
V
V
V
V