LT4363C .................................................. 0°C to 70°C
LT4363I................................................–40°C to 85°C
LT4363H ............................................ –40°C to 125°C
LT4363MP ......................................... –55°C to 125°C
Storage Temperature Range
DE12 .................................................. –65°C to 125°C
MS, SO .............................................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
MS, SO ............................................................. 300°C
pin conFiguraTion
LT4363-1
TOP VIEW
FB
OUT
SNS
GATE
V
CC
SHDN
1
2
3
4
5
6
13
GND
12
11
10
9
8
7
TMR
ENOUT
FLT
GND
UV
GND
FB
OUT
SNS
GATE
V
CC
SHDN
1
2
3
4
5
6
TOP VIEW
12
11
10
9
8
7
TMR
ENOUT
FLT
GND
UV
GND
OUT
SNS
NC
GATE
NC
V
CC
NC
SHDN
1
2
3
4
5
6
7
8
LT4363-1
LT4363-1
TOP VIEW
16 FB
15 TMR
14 NC
13 ENOUT
12
FLT
11 GND
10 UV
9
GND
DE PACKAGE
12-LEAD (4mm
×
3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 43°C/W
EXPOSED PAD (PIN 13) IS GND, CONNECTION TO PCB
OPTIONAL
LT4363-2
TOP VIEW
FB
OUT
SNS
GATE
V
CC
SHDN
1
2
3
4
5
6
13
GND
12
11
10
9
8
7
TMR
ENOUT
FLT
GND
UV
OV
FB
OUT
SNS
GATE
V
CC
SHDN
LT4363-2
MS PACKAGE
12-LEAD PLASTIC MSOP
T
JMAX
= 125°C,
θ
JA
= 135°C/W
S PACKAGE
16-LEAD PLASTIC SO
T
JMAX
= 125°C,
θ
JA
= 80°C/W
LT4363-2
TOP VIEW
TOP VIEW
1
2
3
4
5
6
12
11
10
9
8
7
TMR
ENOUT
FLT
GND
UV
OV
OUT
SNS
NC
GATE
NC
V
CC
NC
SHDN
1
2
3
4
5
6
7
8
16 FB
15 TMR
14 NC
13 ENOUT
12
FLT
11 GND
10 UV
9
OV
DE PACKAGE
12-LEAD (4mm
×
3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 43°C/W
EXPOSED PAD (PIN 13) IS GND, CONNECTION TO PCB
OPTIONAL
MS PACKAGE
12-LEAD PLASTIC MSOP
T
JMAX
= 125°C,
θ
JA
= 135°C/W
S PACKAGE
16-LEAD PLASTIC SO
T
JMAX
= 125°C,
θ
JA
= 80°C/W
4363fb
2
For more information
www.linear.com/LT4363
LT4363
orDer inForMaTion
LEAD FREE FINISH
LT4363CDE-1#PBF
LT4363IDE-1#PBF
LT4363HDE-1#PBF
LT4363CDE-2#PBF
LT4363IDE-2#PBF
LT4363HDE-2#PBF
LT4363CMS-1#PBF
LT4363HMS-1#PBF
LT4363IMS-1#PBF
LT4363MPMS-1#PBF
LT4363CMS-2#PBF
LT4363HMS-2#PBF
LT4363IMS-2#PBF
LT4363MPMS-2#PBF
LT4363CS-1#PBF
LT4363HS-1#PBF
LT4363IS-1#PBF
LT4363MPS-1#PBF
LT4363CS-2#PBF
LT4363HS-2#PBF
LT4363IS-2#PBF
LT4363MPS-2#PBF
TAPE AND REEL
LT4363CDE-1#TRPBF
LT4363IDE-1#TRPBF
LT4363HDE-1#TRPBF
LT4363CDE-2#TRPBF
LT4363IDE-2#TRPBF
LT4363HDE-2#TRPBF
LT4363CMS-1#TRPBF
LT4363HMS-1#TRPBF
LT4363IMS-1#TRPBF
LT4363MPMS-1#TRPBF
LT4363CMS-2#TRPBF
LT4363HMS-2#TRPBF
LT4363IMS-2#TRPBF
LT4363MPMS-2#TRPBF
LT4363CS-1#TRPBF
LT4363HS-1#TRPBF
LT4363IS-1#TRPBF
LT4363MPS-1#TRPBF
LT4363CS-2#TRPBF
LT4363HS-2#TRPBF
LT4363IS-2#TRPBF
LT4363MPS-2#TRPBF
PART MARKING*
43631
43631
43631
43632
43632
43632
43631
43631
43631
43631
43632
43632
43632
43632
LT4363S-1
LT4363S-1
LT4363S-1
LT4363S-1
LT4363S-2
LT4363S-2
LT4363S-2
LT4363S-2
PACKAGE DESCRIPTION
12-Lead (4mm
×
3mm) Plastic DFN
12-Lead (4mm
×
3mm) Plastic DFN
12-Lead (4mm
×
3mm) Plastic DFN
12-Lead (4mm
×
3mm) Plastic DFN
12-Lead (4mm
×
3mm) Plastic DFN
12-Lead (4mm
×
3mm) Plastic DFN
12-Lead Plastic MSOP
12-Lead Plastic MSOP
12-Lead Plastic MSOP
12-Lead Plastic MSOP
12-Lead Plastic MSOP
12-Lead Plastic MSOP
12-Lead Plastic MSOP
12-Lead Plastic MSOP
16-Lead Plastic SO
16-Lead Plastic SO
16-Lead Plastic SO
16-Lead Plastic SO
16-Lead Plastic SO
16-Lead Plastic SO
16-Lead Plastic SO
16-Lead Plastic SO
TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 125°C
–40°C to 85°C
–55°C to 125°C
0°C to 70°C
–40°C to 125°C
–40°C to 85°C
–55°C to 125°C
0°C to 70°C
–40°C to 125°C
–40°C to 85°C
–55°C to 125°C
0°C to 70°C
–40°C to 125°C
–40°C to 85°C
–55°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.
Consult LTC Marketing for information on non-standard lead based finish parts.
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/
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 12V, unless otherwise noted.
SYMBOL
V
CC
I
CC
I
R
ΔV
GATE
I
GATE(UP)
I
GATE(DN)
PARAMETER
Operating Voltage Range
V
CC
Supply Current
Reverse Input Current
GATE Drive
GATE Pull-Up Current
GATE Pull-Down Current
CONDITIONS
LT4363
SHDN
Open, OUT = SNS = 12V
SHDN
= 0V, OUT = SNS = 0V
V
CC
= –60V,
SHDN,
UV, OV Open
V
CC
=
SHDN
= UV = OV = –60V
ΔV
GATE
= (GATE – SNS);V
CC
= OUT
V
CC
= 4V; I
GATE
= –0.5µA, 0µA
9V ≤ V
CC
≤ 80V; I
GATE
= –1µA, 0µA
V
CC
= GATE = OUT = 12V
V
CC
= GATE = OUT = 48V
Overvoltage: FB = 1.5V, GATE = 12V, OUT = 5V
Overcurrent:
ΔV
SNS
= 150mV, V
GATE
= 10V, OUT = 0V
Shutdown/UV Mode:
SHDN
= 0V, GATE = 10V
UV = 1V, GATE = 10V
GATE = 12V; OUT = 8V
l
l
l
l
l
l
l
l
l
l
l
l
l
l
elecTrical characTerisTics
MIN
4
TYP
0.7
7
–0.5
–3
MAX
80
1.2
20
40
–4
–10
16
–45
–65
UNITS
V
mA
µA
µA
mA
mA
V
V
µA
µA
mA
mA
µA
µA
4.5
10
–15
–20
75
50
50
200
1.25
13
–30
–40
150
100
1000
1000
1.275
V
FB
FB Servo Voltage
1.3
V
4363fb
For more information
www.linear.com/LT4363
3
LT4363
elecTrical characTerisTics
SYMBOL
I
FB
ΔV
SNS
PARAMETER
FB Input Current
Current Limit Sense Voltage
ΔV
SNS
= (SNS – OUT)
Current Limit Foldback
I
SNS
I
TMR
SNS Input Current
TMR Pull-up Current, Overvoltage
TMR Pull-up Current, OV Warning
TMR Pull-up Current, Overcurrent
TMR Pull-up Current, Cool Down
TMR Pin Pull-down Current, Cool Down
V
TMR(F)
V
TMR(G)
V
TMR(R)
ΔV
TMR
V
TMR(H)
V
UV
V
UV(HYST)
V
OV
V
OV(HYST)
I
IN
I
LEAK
V
OL
ΔV
OUT(TH)
I
OUT
V
SHDN
V
SHDN(Z)
I
SHDN
t
RESET
D
t
OFF(UV)
t
OFF(OV)
t
OFF(OC)
TMR Fault Threshold
TMR Gate Off Threshold
TMR Restart Threshold
Early Warning Window
TMR Cool Down High Threshold
UV Input Threshold
UV Input Hysteresis
OV Input Threshold
OV Input Hysteresis
UV, OV Input Current
FLT,
ENOUT Leakage Current
FLT,
ENOUT Output Low
OUT High Threshold
OUT Input Current
SHDN
Threshold
SHDN
Open Voltage
SHDN
Current
SHDN
Reset Time
Retry Duty Cycle; Overvoltage
Retry Duty Cycle; Output Short
Overvoltage Turn Off Propagation Delay
Overcurrent Turn Off Propagation Delay
UV = 1.275V
UV = –60V
FLT,
ENOUT = 80V
I
SINK
= 0.1mA
I
SINK
= 2mA
ΔV
OUT
= V
CC
– V
OUT
, ENOUT From Low to High
ENOUT From High to Low
V
CC
= OUT = 12V,
SHDN
Open
V
CC
= OUT = 12V,
SHDN
= 0V
V
CC
= 4V to 80V
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
CC
= 12V, unless otherwise noted.
CONDITIONS
V
FB
= 1.275V
V
CC
= 12V, OUT = 3V to 12V
V
CC
= 48V, OUT = 3V to 48V
V
CC
= 12V, OUT = 0V to 1V
V
CC
= 48V, OUT = 0V to 1V
OUT = SNS = 3V to 80V
OUT = SNS = 0V
TMR = 1V, FB = 1.5V,
ΔV
DS
= 0.5V
TMR = 1V, FB = 1.5V,
ΔV
DS
= 75V
TMR = 1.325V, FB = 1.5V,
ΔV
DS
= 0.5V
TMR = 1V,
ΔV
SNS
= 100mV,
ΔV
DS
= 0.5V
TMR = 1V,
ΔV
SNS
= 100mV,
ΔV
DS
= 80V
TMR = 3V, FB = 1.5V,
ΔV
SNS
= 0V,
ΔV
DS
= 0V
V
TMR
= 3V, FB = 1.5V,
ΔV
SNS
= 0V,
ΔV
DS
= 0V
TMR Rising
TMR Rising
TMR Falling, LT4363-2
V
TMR(G)
– V
TMR(F)
V
CC
= 7V to 80V, TMR Rising
UV Rising
OV Rising
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
MIN
45
48
15
16
TYP
±0.2
50
53
25
27
20
–10
MAX
±1
55
58
35
36
40
–15
–6
–58
–7
–13
–310
–3.5
4
1.31
1.41
0.53
120
5.4
1.31
1.31
±1
–2
±2.5
800
9
0.75
3.6
0.5
1
1.7
2.1
2.2
–8
100
2
1
5
1
2.5
UNITS
µA
mV
mV
mV
mV
µA
µA
µA
µA
µA
µA
µA
µA
µA
V
V
V
mV
V
V
mV
V
mV
µA
mA
µA
mV
V
V
V
mA
mA
V
V
V
µA
µs
%
%
µs
µs
µs
–1.7
–42
–3
–5
–190
–1
1
1.235
1.335
0.47
80
3.5
1.24
1.24
–4
–50
–5
–9
–250
–2.3
2
1.275
1.375
0.5
100
4.3
1.275
12
1.275
7.5
±0.2
–1
±0.5
300
2
l
0.25
1.8
0.5
2.7
0.25
0.25
ΔV
OUT(RST)
OUT Reset Threshold
0.6
0.4
–1
1.4
V
CC
= 4V to 80V
SHDN
= 0.4V
SHDN
≤ 0.4V; LT4363-1
V
CC
= 80V, OUT = 16V, FB = 1.5V; LT4363-2
V
CC
= 12V, OUT = 0V, ∆V
SNS
= 100mV; LT4363-2
FB Steps from 0V to 1.5V; OUT = 0V
∆V
SNS
Steps from 0V to 150mV; OUT = 0V
l
l
l
l
l
l
l
l
–4
1
0.76
2
0.25
1
Undervoltage Turn Off Propagation Delay UV Steps from 1.5V to 1V
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:
All currents into device pins are positive, all currents out of device pins
are negative. All voltages are referenced to GND unless otherwise specified.
Note 3:
An internal clamp limits the GATE pin to a minimum of 10V above
the OUT pin. Driving this pin to voltages beyond the clamp may damage
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