Datasheet

LTC4365
4
Rev. B
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SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
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
1 2 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 FAULT 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
LTC4365
LTC4365-1
l
l
26
0.3
36
0.7
55
2
ms
ms
F
AULT
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
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.
ELECTRICAL CHARACTERISTICS
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)
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