Datasheet
2
LT1072
1072fc
Supply Voltage
LT1072HV (See Note 1) ......................................... 60V
LT1072 (See Note 1) ............................................. 40V
Switch Output Voltage
LT1072HV ............................................................. 75V
LT1072 .................................................................. 65V
LT1072S8 .............................................................. 60V
Feedback Pin Voltage (Transient, 1ms) ................. ±15V
Operating Junction Temperature Range
LT1072HVM, LT1072M (OBSOLETE) .... –55°C to 150°C
LT1072HVC, LT1072C (Oper.)*............0°C to 100°C
LT1072HVC, LT1072C (Sh. Ckt.)* ........0°C to 125°C
LT1072HVI ....................................... –40°C to 125°C
Storage Temperature Range ............... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) ...............300°C
*Includes LT1072S8
(Note 1)
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Note 1: Minimum switch “on” time for the LT1072 in current limit is
≈ 0.7µsec. This limits the maximum input voltage during short-circuit
conditions,
in the buck and inverting modes only,
to ≈ 40V. Normal
(unshorted) conditions are not affected. If the LT1072 is being operated in
the buck or inverting mode at high input voltages and short-circuit
conditions are expected, a resistor must be placed in series with the
inductor, as follows:
The value of the resistor is given by:
R = – R
L
(t) (f) (V
IN
) – V
f
I
(LIMIT)
t = Minimum “on” time of LT1072 in current limit, ≈ 0.7µs
f = Operating frequency (40kHz)
V
f
= Forward voltage of external catch diode at I
(LIMIT)
I
(LIMIT)
= Current limit of LT1072 (2A)
R
L
= Internal series resistance of inductor
OBSOLETE PACKAGE
OBSOLETE PACKAGE
Consider the S8 or N8 Packages for Alternate Source
T PACKAGE
5-LEAD TO-220
T
JMAX
= 100°C/W, θ
JC
= 8°C/W, θ
JA
= 50°C/W
V
IN
V
C
GND
FB
V
SW
FRONT VIEW
5
4
3
2
1
N PACKAGE
8-LEAD PDIP
T
JMAX
= 100°C, θ
JA
= 130°C/W
J PACKAGE
8-LEAD CERAMIC DIP
T
JMAX
= 150°C, θ
JA
= 100°C/W
1
2
3
4
8
7
6
5
TOP VIEW
GND
V
C
FB
NC
E2
V
SW
E1
V
IN
1
2
3
4
5
6
7
8
SW PACKAGE
16-LEAD PLASTIC SO WIDE
T
JMAX
= 100°C, θ
JC
= 130°C/W
16
15
14
13
12
11
10
9
NC
NC
GND
V
C
FB
NC
NC
NC
NC
NC
E2
V
SW
E1
V
IN
NC
NC
TOP VIEW
BOTTOM VIEW
K PACKAGE
4-LEAD TO-3 METAL CAN
T
JMAX
= 150°C, θ
JC
= 8°C/W, θ
JA
= 35°C/W
T
JMAX
= 100°C*, θ
JC
= 8°C/W, θ
JA
= 35°C/W
CASE IS
GND
V
C
1
4
2
3
FB
V
SW
V
IN
LT1072HVMK
LT1072MK
LT1072HVCK
LT1072CK
ORDER PART
NUMBER
ORDER PART
NUMBER
ORDER PART
NUMBER
ORDER PART
NUMBER
LT1072CT
LT1072HVCT
LT1072HVIT
LT1072CN8
LT1072CS8
LT1072MJ8
LT1072CJ8
LT1072CSW
LT1072 • POI01
1
2
3
4
8
7
6
5
TOP VIEW
E2
V
SW
E1
V
IN
GND
V
C
FB
NC
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 100°C, θ
JA
= 130°C/W
S8 PART
MARKING
1072
ABSOLUTE AXI U RATI GS
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PACKAGE/ORDER I FOR ATIO
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