LT8582E ............................................ –40°C to 125°C
LT8582I ............................................. –40°C to 125°C
Storage Temperature Range .................. –65°C to 150°C
Note:
Absolute maximum ratings are shown for channel 1 only. Channel 2
ratings are identical.
1
2
3
4
5
6
7
8
9
10
11
12
25
GND
DKD PACKAGE
24-LEAD (7mm
×
4mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 34°C/W,
θ
JC
= 7°C/W
EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LT8582EDKD#PBF
LT8582IDKD#PBF
TAPE AND REEL
LT8582EDKD#TRPBF
LT8582IDKD#TRPBF
PART MARKING*
8582
8582
PACKAGE DESCRIPTION
24-Pin (7mm
×
4mm) Plastic DFN
24-Pin (7mm
×
4mm) Plastic DFN
TEMPERATURE RANGE
–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/
8582f
2
LT8582
ELECTRICAL CHARACTERISTICS
PARAMETER
Minimum Input Voltage V
IN
V
IN
Overvoltage Lockout
Positive Feedback Voltage
Negative Feedback Voltage
Positive FBX Pin Bias Current
Negative FBX Pin Bias Current
Error Amp Transconductance
Error Amp Voltage Gain
Quiescent Current
Quiescent Current in Shutdown
Reference Line Regulation
Switching Frequency, f
OSC
Switching Frequency in Foldback
Switching Frequency Range
SYNC High Level for Sync
SYNC Low Level for Sync
SYNC Clock Pulse Duty Cycle
Recommended Min SYNC Ratio f
SYNC
/f
OSC
Minimum Off-Time
Minimum On-Time
SWA Current Limit
SWA FAULT Current Limit
SW Current Sharing, I
SWB
/I
SWA
SWA + SWB Current Limit
SWA + SWB FAULT Current Limit
Switch V
CESAT
SWA Leakage Current
SWB Leakage Current
SS Charge Current
SS Discharge Current
SS High Detection Voltage
SS Low Detection Voltage
SHDN
Minimum Input Voltage High
SHDN
Input Voltage Low
Minimum Duty Cycle
Maximum Duty Cycle
Minimum Duty Cycle
Maximum Duty Cycle
SWA and SWB Tied Together
Minimum Duty Cycle, I
SWB
/I
SWA
= 0.79
Maximum Duty Cycle, I
SWB
/I
SWA
= 0.79
Minimum Duty Cycle, I
SWB
/I
SWA
= 0.79
Maximum Duty Cycle, I
SWB
/I
SWA
= 0.79
I
SWA
+ I
SWB
= 2.75A
V
SWA
= 5V, V
SHDN
= 0
V
SWB
= 5V, V
SHDN
= 0
V
SS
= 30mV, Current Flows out of SS Pin
Part in FAULT, V
SS
= 2.1V, Current Flows into SS Pin
Part in FAULT
Part Exiting FAULT
Active Mode,
SHDN
Rising
Active Mode,
SHDN
Falling
Shutdown Mode
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 5V, V
SHDN
= V
IN
, unless otherwise noted (Note 2). Specifications
are identical for both channels unless noted otherwise.
CONDITIONS
l
MIN
22.2
1.185
2
81
81
TYP
2.3
24.5
1.204
7
83.3
83.3
280
80
2.1
0
0.01
MAX
2.5
27
1.220
16
85
85.5
UNITS
V
V
V
mV
μA
μA
μmhos
V/V
V
FBX
= Positive Feedback Voltage, Current into Pin
V
FBX
= Negative Feedback Voltage, Current out of Pin
ΔI = 10μA
V
SHDN
= 2.5V, Not Switching
V
SHDN
= 0
2.5V ≤ V
IN
≤ 20V
R
T
= 31.6kΩ
R
T
= 407kΩ
Compared to Normal f
OSC
Free-Running or Synchronizing
l
l
2.5
1
0.05
2.875
230
2500
0.4
mA
μA
%/V
MHz
kHz
ratio
kHz
V
V
%
ratio
ns
ns
l
l
l
l
l
2.125
170
200
1.3
20
2.5
200
1/6
V
SYNC
= 0V to 2V
80
3/4
45
55
1.8
1.3
2.2
1.6
3.3
2.3
4
2.8
2.4
1.8
2.8
2.3
0.79
4.3
4.1
5
4
270
0.01
0.01
3
2.5
3.5
3.0
5.4
4.5
6.3
5.4
1
1
11.7
11.7
2
100
1.4
1.35
0.3
A
A
A
A
A/A
A
A
A
A
mV
μA
μA
μA
μA
V
mV
V
V
V
5.7
5.7
1.65
15
1.26
1.21
8.8
8.8
1.84
55
1.31
1.27
8582f
3
LT8582
ELECTRICAL CHARACTERISTICS
PARAMETER
SHDN
Pin Bias Current
CONDITIONS
V
SHDN
= 3V
V
SHDN
= 1.3V
V
SHDN
= 0V
1mA out of CLKOUT Pin
1mA into CLKOUT Pin
All T
J
T
J
= –40°C
T
J
= 25°C
T
J
= 125°C
C
CLKOUT
= 120pF
C
CLKOUT
= 120pF
V
GATE
= 3V
V
GATE
= 20V
V
GATE
= 50V, GATE Off
V
FBX
Rising
1.09
20
l
l
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 5V, V
SHDN
= V
IN
, unless otherwise noted (Note 2). Specifications
are identical for both channels unless noted otherwise.
MIN
10.1
1.9
TYP
45
12.1
0
2.1
30
50
22.5
42
72
25
15
0.8
0.8
1
1
0.01
1.15
65
4
100μA into PG Pin, V
FBX
= 1V
V
PG
= 40V, V
FBX
= 1.204V
70
0.01
150
1
1.2
1.2
1
1.20
120
MAX
65
14.1
0.1
2.3
200
UNITS
μA
μA
μA
V
mV
%
%
%
%
ns
ns
mA
mA
μA
V
mV
mV
mV
μA
CLKOUT Output Voltage High
CLKOUT Output Voltage Low
CLKOUT1 Duty Cycle
CLKOUT2 Duty Cycle
CLKOUT Rise Time
CLKOUT Fall Time
GATE Pull-Down Current
GATE Leakage Current
PG Threshold for Positive Feedback Voltage
PG Hysteresis for Feedback Voltage
PG Output Voltage Low
PG Leakage Current
PG Threshold for Negative Feedback Voltage V
FBX
Falling
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 LT8582E is guaranteed to meet performance specifications
from 0°C to 125°C junction temperature. Specifications over the
–40°C to 125°C operating temperature range are assured by design,
characterization and correlation with statistical process controls. The
LT8582I is guaranteed over the full –40°C to 125°C operating junction
temperature range.
Note 3:
Current limit guaranteed by design and/or correlation to static test.
Note 4:
This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation over the specified maximum operating junction
temperature may impair device reliability.
Note 5:
Do not apply a positive or negative voltage or current source to
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