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