LT8601
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = PVIN1 = PVIN2 = 12V, EN/UVLO = 3V, PVIN3 = 3.3V unless otherwise
noted. (Note 2)
PARAMETER
CONDITIONS
MIN
TYP
108
0.13
MAX
111
0.3
UNITS
%
l
l
l
Upper FB2 Power Good Threshold
PG2 Output Voltage Low
PG2 Leakage Current
TRKSS2 Pull-Up Current
Minimum Switch-On Time
Minimum Switch-Off Time
Channel 3
Percentage of V
105
FB2
I
= –350µA
V
PG2
PG2 = 5V, FB2 = 1V
TRKSS2 = 0.2V
30
µA
µA
ns
1.5
2.4
55
70
3.1
I
I
= 2A
= 2A
SW2
SW2
ns
l
Operating Voltage
2.6
5.5
V
l
l
Feedback Voltage FB3
E-, I-Grade
J-Grade
790
784
800
800
810
812
mV
mV
l
Input Current FB3
–100
100
0.01
3.8
1
nA
%/V
A
FB3 Voltage Line Regulation
SW3 Current Limit
V
= 3V to 42V
0.002
3.2
IN
2.6
SW3 Leakage
PV = 5.5V
0.1
µA
mΩ
mΩ
%
IN3
SW3 PMOS On Resistance
SW3 NMOS On Resistance
Lower FB3 Power Good Threshold
Upper FB3 Power Good Threshold
PG3 Output Voltage Low
PG3 Leakage Current
I
I
= 1A
= 1A
150
120
92
SW3
SW3
l
l
l
l
l
l
l
Percentage of V
Percentage of V
89
95
111
0.3
FB3
105
108
0.13
%
FB3
I
= –350μA
V
PG3
PG3 = 5V, FB3 = 0.8V
200mV/ms Falling Ramp
RUN3 = 3.3V
30
µA
V
RUN3 Threshold Voltage
RUN3 Input Current
0.695
–100
0.7
0.72
0.74
100
1.3
nA
ms
ns
ns
V
Soft-Start Time
1
70
Minimum Switch-On Time
Minimum Switch-Off Time
I
I
= 1A
= 1A
SW3
70
SW3
l
PV UVLO
IN3
2.35
2.6
Power-On Reset
CPOR Pull-Up Current
POR Delay Time
CPOR = 0V
2
μA
ms
V
l
l
CPOR = 1000pF
31
35.2
0.1
20
39.4
0.2
RST Output Voltage Low
RST Pull-Up Current
RST Leakage Current
POREN Threshold
I
= –100μA
RST
POR Timed Out, RST = 0V
RST = 6V, POR Timed Out
μA
nA
V
–40
1.15
0.8
40
1.25
1.6
l
1.2
1.2
POREN Pull-Up Current
POREN = 0V
μA
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 LT8601E is guaranteed to meet performance specifications
from 0°C to 125°C junction temperature. Specifications over the –40°C
to 125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LT8601I is guaranteed to meet performance specifications from –40°C
to 125°C junction temperature. The LT8601J is guaranteed over the full
–40°C to 150°C operating junction temperature range. High junction
temperatures degrade operating lifetimes. Operating lifetime is derated at
junction temperatures above 125°C.
Note 3: This IC includes overtemperature protection that is intended to
protect the device during overload conditions. Junction temperature will
exceed 150°C when overtemperature protection is active. Continuous
operation above the specified maximum junction temperature will reduce
lifetime.
Note 4: All three channels enabled as shown in the application circuit
titled, “Details of the Front Page Application” (using the 1MHz component
values) found in the Typical Applications section.
Rev. B
4
For more information www.analog.com
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