Datasheet

3
LTC4412
4412fa
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: The LTC4412E is guaranteed to meet performance specifications
from 0°C to 85°C operating temperature range. Specifications over the –
40°C to 85°C operating temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTC4412IS6 is guaranteed over the –40°C to 85°C operating temperature
range.
Note 3: This results in the same supply current as would be observed with
an external P-channel MOSFET connected to the LTC4412 and operating in
forward regulation.
Note 4: V
IN
is held at 12V and GATE is forced to 10.5V. SENSE is set at
12V to measure the source current at GATE. SENSE is set at 11.9V to
measure sink current at GATE.
Note 5: V
IN
is held at 12V and SENSE is stepped from 12.2V to 11.8V to
trigger the event. GATE voltage is initially V
G(OFF)
.
Note 6: V
IN
is held at 12V and SENSE is stepped from 11.8V to 12.2V to
trigger the event. GATE voltage is initially internally clamped at V
G(ON)
.
Note 7: STAT is forced to V
IN
– 1.5V. SENSE is set at V
IN
– 0.1V to
measure the off current at STAT. SENSE is set V
IN
+ 0.1V to measure the
sink current at STAT.
Note 8: STAT is forced to 9V and V
IN
is held at 12V. SENSE is stepped
from 11.8V to 12.2V to measure the STAT turn-on time defined when I
STAT
reaches one half the measured I
S(SNK).
SENSE is stepped from 12.2V to
11.8V to measure the STAT turn-off time defined when I
STAT
reaches one
half the measured I
S(SNK) .
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
QCL
Quiescent Supply Current at Low Supply V
IN
= 3.6V, V
SENSE
= 0V, V
CTL
= 1V 7 13 μA
with CTL Active
I
QCH
Quiescent Supply Current at High Supply V
IN
= 28V, V
SENSE
= 0V, V
CTL
= 1V 12 20 μA
with CTL Active
I
LEAK
V
IN
and SENSE Pin Leakage Currents V
IN
= 28V, V
SENSE
= 0V; V
SENSE
= 28V, V
IN
= 0V –3 0 1 μA
When Other Pin Supplies Power V
IN
= 14V, V
SENSE
= –14V; V
SENSE
= 14V, V
IN
= –14V
PowerPath Controller
V
FR
PowerPath Switch Forward Regulation V
IN
– V
SENSE
, 2.5V ≤ V
IN
≤ 28V ● 10 20 32 mV
Voltage
V
RTO
PowerPath Switch Reverse Turn-Off V
SENSE
– V
IN
, 2.5V ≤ V
IN
≤ 28V ● 10 20 32 mV
Threshold Voltage
GATE and STAT Outputs
GATE Active Forward Regulation (Note 4)
I
G(SRC)
Source Current –1 –2.5 –5 μA
I
G(SNK)
Sink Current 25 50 85 μA
V
G(ON)
GATE Clamp Voltage Apply I
GATE
= 1μA, V
IN
= 12V, 6.3 7 7.7 V
V
SENSE
= 11.9V, Measure V
IN
– V
GATE
V
G(OFF)
GATE Off Voltage Apply I
GATE
= – 5μA, V
IN
= 12V, 0.13 0.25 V
V
SENSE
= 12.1V, Measure V
SENSE
– V
GATE
t
G(ON)
GATE Turn-On Time V
GS
< –3V, C
GATE
= 1nF (Note 5) 110 175 μs
t
G(OFF)
GATE Turn-Off Time V
GS
> –1.5V, C
GATE
= 1nF (Note 6) 13 22 μs
I
S(OFF)
STAT Off Current 2.5V ≤ V
IN
≤ 28V (Note 7) ● –1 0 1 μA
I
S(SNK)
STAT Sink Current 2.5V ≤ V
IN
≤ 28V (Note 7) ● 61017 μA
t
S(ON)
STAT Turn-On Time (Note 8) 4.5 25 μs
t
S(OFF)
STAT Turn-Off Time (Note 8) 40 75 μs
CTL Input
V
IL
CTL Input Low Voltage 2.5V ≤ V
IN
≤ 28V ● 0.5 0.35 V
V
IH
CTL Input High Voltage 2.5V ≤ V
IN
≤ 28V ● 0.9 0.635 V
I
CTL
CTL Input Pull-Down Current 0.35V ≤ V
CTL
≤ 28V 1 3.5 5.5 μA
H
CTL
CTL Hysteresis 2.5V ≤ V
IN
≤ 28V 135 mV
The ● denotes specifications which apply over the full operating
temperature range, unless otherwise noted specifications are at T
A
= 25°C, V
IN
= 12V, CTL and GND = 0V. Current into a pin is positive
and current out of a pin is negative. All voltages are referenced to GND, unless otherwise specified.
ELECTRICAL CHARACTERISTICS