Datasheet

LTC4412
3
4412fb
For more information www.linear.com/LTC4412
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
junction 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.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
,
V
SENSE
Operating Supply Range V
IN
and/or V
SENSE
Must Be in This Range
for Proper Operation
l
2.5 28 V
I
QFL
Quiescent Supply Current at Low Supply
While in Forward Regulation
V
IN
= 3.6V. Measure Combined Current
at V
IN
and SENSE Pins Averaged with
V
SENSE
= 3.5V and V
SENSE
= 3.6V (Note 3)
l
11 19 µA
I
QFH
Quiescent Supply Current at High Supply
While in Forward Regulation
V
IN
= 28V. Measure Combined Current
at V
IN
and SENSE Pins Averaged with
V
SENSE
= 27.9V and V
SENSE
= 28V (Note 3)
l
15 26 µA
I
QRL
Quiescent Supply Current at Low Supply
While in Reverse Turn-Off
V
IN
= 3.6V, V
SENSE
= 3.7V. Measure
Combined Current of V
IN
and SENSE Pins
10 19 µA
I
QRH
Quiescent Supply Current at High Supply
While in Reverse Turn-Off
V
IN
= 27.9V, V
SENSE
= 28V. Measure
Combined Current of V
IN
and SENSE Pins
16 28 µA
I
QCL
Quiescent Supply Current at Low Supply
with CTL Active
V
IN
= 3.6V, V
SENSE
= 0V, V
CTL
= 1V 7 13 µA
I
QCH
Quiescent Supply Current at High Supply
with CTL Active
V
IN
= 28V, V
SENSE
= 0V, V
CTL
= 1V 12 20 µA
I
LEAK
V
IN
and SENSE Pin Leakage Currents
When Other Pin Supplies Power
V
IN
= 28V, V
SENSE
= 0V; V
SENSE
= 28V, V
IN
= 0V
V
IN
= 14V, V
SENSE
= –14V; V
SENSE
= 14V, V
IN
= –14V
–3 0 1 µA
PowerPath Controller
V
FR
PowerPath Switch Forward Regulation
Voltage
V
IN
– V
SENSE
, 2.5V ≤ V
IN
≤ 28V
l
10 20 32 mV
V
RTO
PowerPath Switch Reverse Turn-Off
Threshold Voltage
V
SENSE
– V
IN
, 2.5V ≤ V
IN
≤ 28V
l
10 20 32 mV
GATE and S TAT Outputs
I
G(SRC)
I
G(SNK)
GATE Active Forward Regulation
Source Current
Sink Current
(Note 4)
–1
25
–2.5
50
–5
85
µA
µA
V
G(ON)
GATE Clamp Voltage Apply I
GATE
= 1µA, V
IN
= 12V,
V
SENSE
= 11.9V, Measure V
IN
– V
GATE
6.3 7 7.7 V
V
G(OFF)
GATE Off Voltage Apply I
GATE
= –5µA, V
IN
= 12V,
V
SENSE
= 12.1V, Measure V
SENSE
– V
GATE
0.13 0.25 V
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)
l
–1 0 1 µA
I
S(SNK)
STAT Sink Current 2.5V ≤ V
IN
≤ 28V (Note 7)
l
6 10 17 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
l
0.5 0.35 V
V
IH
CTL Input High Voltage 2.5V ≤ V
IN
≤ 28V
l
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
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