LT4256 LINER [Linear Technology], LT4256 Datasheet - Page 3

• Manufacturer Part Number: LT4256
• Description: UV, OV and Reverse Supply Protection Controller Low Operating Current: 125?A
• Manufacturer: LINER [Linear Technology]

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
SYMBOL
V
V
I
I
V
I
GATE
ΔV
I
I
I
t
t
t
UV, OV
V
V
V
V
I
t
SHDN
V
I
t
t
t
FAULT
V
I
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 pins are positive; all voltages are referenced to
GND unless otherwise noted.
VIN
VIN(R)
VOUT
GATE(UP)
GATE(FAST)
GATE(SLOW)
GATE(FAST)
GATE(SLOW)
RECOVERY
LEAK
FAULT
SHDN
START
SHDN(F)
LOWPWR
FAULT
IN
IN
IN(UVLO)
UV
OV
UVHYST
OVHYST
SHDN
OL
GATE
, V
OUT
PARAMETER
Input Voltage Range
Input Supply Current
Reverse Input Supply Current
Input Supply Undervoltage Lockout
V
N-Channel Gate Drive
(GATE-V
N-Channel Gate Pull Up Current
N-Channel Gate Fast Pull Down Current
N-Channel Gate Gentle Pull Down Current
N-Channel Gate Fast Turn Off Delay
N-Channel Gentle Turn Off Delay
GATE Recovery Delay Time
UV Input Threshold Voltage
OV Input Threshold Voltage
UV Input Hysteresis
OV Input Hysteresis
UV, OV Leakage Current
UV, OV Fault Propagation Delay
SHDN Input Threshold
SHDN Input Current
Delay Coming Out of Shutdown Mode
SHDN to FAULT Asserted
Delay from Turn Off to Low Power Operation
FAULT Output Voltage Low
FAULT Leakage Current
OUT
Input Current
OUT
)
A
= 25°C. V
CONDITIONS
Operating Range
Protection Range
SHDN = 0V, V
SHDN = 0V, V
SHDN = 2.5V
V
V
SHDN = 0V, V
SHDN = 2.5V, V
V
V
V
GATE = V
Fast Shutdown, GATE = 20V, V
Gentle Shutdown, GATE = 20V, V
C
C
V
UV Falling → ΔV
OV Rising → ΔV
V = 0.5V, V
Overdrive = 50mV
V
SHDN Falling to ΔV
SHDN = 0.75V, V
SHDN Rising to ΔV
V
V
I
FAULT = 5V, V
FAULT
IN
IN
IN
IN
IN
GATE
GATE
IN
IN
IN
IN
The
= –40V, V
Rising
= –40V, V
= V
= V
= 12V, Power Good to ∆V
= V
= V
= V
= 2.2nF, UV or OV Fault
= 2.2nF, SHDN Falling, V
= 500μA
OUT
OUT
OUT
OUT
OUT
l
IN
IN
denotes the specifications which apply over the full operating
IN
= 5.0V, I
= 12V to 34V, I
= 12V
= 12V
= 12V
= V
= 2.5V to 34V, unless otherwise noted. (Note 2)
= 34V
IN
IN
OUT
IN
OUT
IN
OUT
IN
Note 3. These pins can be tied to voltages below –0.3V through a resistor
that limits the current below 1mA.
Note 4. The GATE pin is referenced to V
the entire operating range.
= V
= V
= V
GATE
= 34V
GATE
IN
= 0V
= 0V
= V
GATE
GATE
= 34V
= 12V
OUT
OUT
OUT
GATE
OUT
= 0V
= 0V
, –40°C to 85°C
, –40°C to 125°C
> 0V, V
= 0V
= –1μA
GATE
GATE
IN
IN
IN
IN
= –1μA
= V
= V
= V
= V
> 0V
OUT
OUT
OUT
OUT
= 12V
= 12V
= 12V
= 12V
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
492.5
492.5
MIN
–40
–12
150
400
OUT
2.5
1.8
7.4
0.4
31
50
26
20
20
26
3
and does not exceed 44V for
TYP
–1.2
0.75
0.15
–20
250
500
500
800
±20
100
2.2
3.6
8.4
1.5
10
10
25
20
50
90
36
25
25
36
6
2
1
LTC4365
507.5
507.5
MAX
1200
–1.8
250
–30
350
100
150
150
±10
±10
2.4
4.2
9.8
1.2
0.4
34
60
50
30
50
72
49
32
32
55
4
2
3
UNITS
3
4365f
mA
mA
mV
mV
mV
mV
ms
ms
μA
μA
μA
μA
μA
μA
μA
μA
nA
nA
nA
μs
μs
μs
μs
μs
V
V
V
V
V
V
V