EN/UVLO Voltage ......................................................42V
BIAS Voltage .............................................. –0.3V to 15V
Operating Junction Temperature (Notes 2, 3)
LT8602E ............................................ –40°C to 125°C
LT8602I ............................................. –40°C to 125°C
Storage Temperature Range .................. –65°C to 150°C
pin conFiguraTion
POREN
CPOR
SYNC
PV
IN1
PV
IN3
SW3
GND
GND
PG3
RST
PG3
POREN
GND
PVIN1
PVIN1
GND
SW3
GND
PVIN3
GND
SYNC
RSTB
30 RUN3
29 RT
28 INTV
CC
27 FB3
41
GND
26 FB1
25 FB2
24 FB4
23 V
IN
22 EN/UVLO
21 TRKSS1
11 12 13 14 15 16 17 18 19 20
PG2
PG4
GND
RUN4
NC
TRKSS2
PV
IN2
SW4
PV
IN4
GND
PG2
PG4
GND
PVIN2
PVIN2
GND
SW4
GND
PVIN4
GND
RUN4
TRKSS2
13
14
15
16
17
18
19
20
21
22
23
24
PG1 1
GND 2
GND 3
SW1 4
SW1 5
BST1 6
BST2 7
SW2 8
SW2 9
GND 10
GND 11
BIAS 12
36
35
34
33
32
31
30
29
28
27
26
25
CPOR
RUN3
RT
INTVCC
FB3
FB1
GND
FB2
FB4
VIN
EN/UVLO
TRKSS1
LXE PACKAGE
48-LEAD (7mm
×
7mm) PLASTIC LQFP
θ
JA
= 20°C/W
EXPOSED PAD (PIN 49) IS GND, MUST BE SOLDERED TO PCB
TOP VIEW
TOP VIEW
40 39 38 37 36 35 34 33 32 31
PG1 1
GND 2
SW1 3
BST1 4
BST2 5
SW2 6
SW2 7
GND 8
GND 9
BIAS 10
UJ PACKAGE
40-LEAD (6mm
×
6mm) PLASTIC QFN
θ
JC
= 2°C/W,
θ
JA
= 33°C/W
EXPOSED PAD (PIN 41) IS GND, MUST BE SOLDERED TO PCB
orDer inForMaTion
LEAD FREE FINISH
LT8602EUJ#PBF
LT8602IUJ#PBF
LT8602ELXE#PBF
LT8602ILXE#PBF
TAPE AND REEL (QFN)/
TRAY (LXE)
LT8602EUJ#TRPBF
LT8602IUJ#TRPBF
LT8602ELXE#TRPBF
LT8602ILXE#TRPBF
http://www.linear.com/product/LT8602#orderinfo
PART MARKING*
LT8602UJ
LT8602UJ
LT8602LXE
LT8602LXE
PACKAGE DESCRIPTION
40-Lead (6mm
×
6mm) Plastic QFN
40-Lead (6mm
×
6mm) Plastic QFN
48-Lead (7mm
×
7mm) Plastic eLQFP
48-Lead (7mm
×
7mm) Plastic eLQFP
MSL
RATING
1
1
3
3
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/.
Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
48
47
46
45
44
43
42
41
40
39
38
37
49
GND
2
8602fb
For more information
www.linear.com/LT8602
LT8602
The
l
denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= PV
IN1
= PV
IN2
= 12V, EN/UVLO = 3V, PV
IN3
= PV
IN4
= 3.3V
unless otherwise noted. (Note 2)
PARAMETER
Minimum Operating Voltage
Minimum Operating Voltage, to Start
V
IN
Quiescent Current, Shutdown
V
IN
Quiescent Current, Operating
EN/UVLO Threshold
EN/UVLO Hysteresis
EN/UVLO Input Current
Oscillator
Switching Frequency
SYNC Input Frequency Range
SYNC Input Voltage Low
SYNC Input Voltage High
SYNC Input Current
Channel 1
Feedback Voltage
FB Voltage Line Regulation
Input Current FB1
SW1 Peak Current Limit
SW1 Leakage Current
SW1 Top On Resistance
SW1 Bottom On Resistance
Lower FB1 Power Good Threshold
Upper FB1 Power Good Threshold
PG1 Output Voltage Low
PG1 Leakage Current
TRKSS1 Pull-Up Current
Minimum Switch-On Time
Minimum Switch-Off Time
I
SW1
= 1A
I
SW1
= 1A
Percentage of V
FB1
Percentage of V
FB1
I
PG1
= –100μA
PG1 = 5V, FB1 = 1V
SS1 = 0.2V
I
SW1
= 1A
I
SW1
= 1A
l
l
l
l
l
elecTrical characTerisTics
CONDITIONS
l
l
MIN
TYP
2.7
3.1
0.1
30
70
MAX
3
3.5
1
UNITS
V
V
µA
µA
µA
EN/UVLO = 0.4V
No Load (Note 4)
100µA on V
OUT2
(Note 4)
EN/UVLO Rising
EN/UVLO = 2V
R
T
= 28.9k
R
T
= 254k
l
l
l
l
1.15
–40
1.8
0.225
0.25
1.2
–100
0.988
–100
2.3
1.2
50
1.25
40
V
mV
nA
MHz
MHz
MHz
V
V
nA
V
%/V
nA
A
µA
mΩ
mΩ
2
0.25
2.2
0.275
2.2
0.3
100
1
0.002
1.012
0.01
100
3.0
1
V
IN
= 3V to 42V
l
V
IN
= P
VIN1
= 6V
2.7
0.1
240
170
89
105
92
108
0.1
95
111
0.2
30
3.1
%
%
V
µA
μA
ns
ns
1.5
2.4
60
70
8602fb
For more information
www.linear.com/LT8602
3
LT8602
The
l
denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= PV
IN1
= PV
IN2
= 12V, EN/UVLO = 3V, PV
IN3
= PV
IN4
= 3.3V
unless otherwise noted. (Note 2)
PARAMETER
Channel 2
Feedback Voltage
FB Voltage Line Regulation
Input Current FB2
SW2 Peak Current Limit
SW2 Leakage Current
SW2 Top On Resistance
SW2 Bottom On Resistance
Lower FB2 Power Good Threshold
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
Operating Voltage
Feedback Voltage
FB Voltage Line Regulation
Input Current FB3
SW3 Average Current Limit
SW3 Leakage
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
RUN3 Threshold Voltage
RUN3 Input Current
Soft-Start Time
Minimum Switch-On Time
Minimum Switch-Off Time
PV
IN3
UVLO
I
SW3
= 1A
I
SW3
= 1A
RUN3 = 3.3V
PV
IN3
= 5.5V
I
SW3
= 1A
I
SW3
= 1A
Percentage of V
FB3
Percentage of V
FB3
I
PG3
= –100μA
PG3 = 5V, FB3 = 0.8V
l
l
l
l
l
l
l
l
l
l
elecTrical characTerisTics
CONDITIONS
MIN
0.988
–100
3.5
TYP
1
0.002
MAX
1.012
0.01
100
4.5
1
UNITS
V
%/V
nA
A
µA
mΩ
mΩ
V
IN
= 3V to 42V
l
V
IN
= P
VIN2
= 6V
I
SW2
= 1A
I
SW2
= 1A
Percentage of V
FB2
Percentage of V
FB2
I
PG2
= –100μA
PG2 = 5V, FB2 = 1V
SS2 = 0.2V
I
SW2
= 2A
I
SW2
= 2A
l
l
l
l
4.0
0.1
150
100
89
105
92
108
0.1
95
111
0.2
30
3.1
%
%
V
µA
µA
ns
ns
1.5
2.4
60
70
2.6
790
–100
1.8
3.1
0.1
150
120
89
105
92
108
0.1
0.695
–100
0.7
1
70
70
2.35
0.72
800
0.002
5.5
810
0.01
100
3.5
1
V
mV
%/V
nA
A
µA
mΩ
mΩ
V
IN
= 3V to 42V
l
95
111
0.2
30
0.75
100
1.3
%
%
V
µA
V
nA
ms
ns
ns
2.6
V
4
8602fb
For more information
www.linear.com/LT8602
LT8602
The
l
denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= PV
IN1
= PV
IN2
= 12V, EN/UVLO = 3V, PV
IN3
= PV
IN4
= 3.3V
unless otherwise noted. (Note 2)
PARAMETER
Channel 4
Operating Voltage
Feedback Voltage
FB Voltage Line Regulation
Input Current FB4
SW4 Average Current Limit
SW4 Leakage
SW4 PMOS On Resistance
SW4 NMOS On Resistance
Lower FB4 Power Good Threshold
Upper FB4 Power Good Threshold
PG4 Output Voltage Low
PG4 Leakage Current
RUN4 Threshold Voltage
RUN4 Input Current
Soft-Start Time
Minimum Switch-On Time
Minimum Switch-Off Time
PV
IN4
UVLO
Power-On Reset
CPOR Pull-Up Current
POR Delay Time
RST
Output Voltage Low
RST
Pull-Up Current
RST
Leakage Current
POREN Threshold
POREN Pull-Up Current
POREN = 0V
CPOR = 0V
CPOR = 1000pF
I
RST
= –100μA
POR Timed Out,
RST
= 0V
RST
= 6V, EN/UVLO = 0V
l
l
l
l
elecTrical characTerisTics
CONDITIONS
MIN
2.6
790
–100
1.8
TYP
MAX
5.5
UNITS
V
mV
%/V
nA
A
µA
mΩ
mΩ
800
0.002
810
0.01
100
3.5
1
V
IN
= 3V to 42V
l
3.1
0.1
150
120
PV
IN4
= 5.5V
I
SW4
= 1A
I
SW4
= 1A
Percentage of V
FB4
Percentage of V
FB4
I
PG4
= –100μA
PG4 = 5V, FB4 = 0.8V
RUN4 = 3.3V
I
SW4
= 1A
I
SW1
= 1A
l
l
l
l
l
l
l
89
105
92
108
0.1
95
111
0.2
30
0.75
100
1.3
%
%
V
µA
V
nA
ms
ns
ns
0.695
–100
0.7
0.72
1
70
70
2.35
2
2.6
V
μA
31
35.2
0.1
20
39.4
0.2
40
ms
V
μA
nA
V
μA
–40
1.15
0.8
1.2
1.2
1.25
1.6
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 LT8602E 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
LT8602I is guaranteed to meet performance specifications from –40°C to
125°C junction temperature.
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 operating junction temperature
will reduce lifetime.
Note 4:
All four channels enabled as shown in the application circuit
details of front page application (using the 1MHz component values) found
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