LT1072IN8 Linear Technology, LT1072IN8 Datasheet - Page 2

• Manufacturer Part Number: LT1072IN8
• Description: IC SWTCHNG REG 1.25A HI-EFF 8DIP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck), Step-Up (Boost), Cuk, Flyback, Forward Converterr

Specifications of LT1072IN8

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.25 ~ 40 V
• Current - Output: 1.25A
• Frequency - Switching: 40kHz
• Voltage - Input: 3 ~ 60 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

ABSOLUTE AXI U RATI GS
Supply Voltage
Switch Output Voltage
Feedback Pin Voltage (Transient, 1ms) ................. ±15V
Operating Junction Temperature Range
Storage Temperature Range ............... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) ............... 300°C
*Includes LT1072S8
Consult LTC Marketing for parts specified with wider operating temperature ranges.
LT1072
(Note 1)
PACKAGE/ORDER I FOR ATIO
2
T
LT1072HV (See Note 1) ......................................... 60V
LT1072 (See Note 1) ............................................. 40V
LT1072HV ............................................................. 75V
LT1072 .................................................................. 65V
LT1072S8 .............................................................. 60V
T
JMAX
T
OBSOLETE PACKAGE
JMAX
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
JMAX
= 100 C/W,
= 100 C*,
V
= 150 C,
V
SW
4-LEAD TO-3 METAL CAN
IN
5-LEAD TO-220
BOTTOM VIEW
FRONT VIEW
K PACKAGE
T PACKAGE
JC
JC
4
JC
1
= 8 C/W,
= 8 C/W,
= 8 C/W,
5
4
3
2
1
2
3
W
JA
JA
JA
= 35 C/W
CASE IS
GND
= 35 C/W
= 50 C/W
V
FB
GND
V
V
C
IN
C
V
FB
W W
SW
U
ORDER PART
LT1072CT
LT1072HVCT
LT1072HVIT
LT1072HVMK
LT1072MK
LT1072HVCK
LT1072CK
ORDER PART
NUMBER
NUMBER
W
U
T
U
GND
JMAX
NC
V
FB
C
= 100 C,
1
2
3
4
Consider the S8 or N8 Packages for Alternate Source
8-LEAD PDIP
N PACKAGE
TOP VIEW
OBSOLETE PACKAGE
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:
t = Minimum “on” time of LT1072 in current limit, ≈ 0.7µs
f = Operating frequency (40kHz)
V
I
R
(LIMIT)
f
L
= Forward voltage of external catch diode at I
JA
R =
= Internal series resistance of inductor
T
JMAX
= 130 C/W
GND
T
(t) (f) (V
= Current limit of LT1072 (2A)
8
7
6
5
8-LEAD CERAMIC DIP
NC
NC
NC
NC
NC
V
FB
JMAX
16-LEAD PLASTIC SO WIDE
C
E2
V
E1
V
= 150 C,
SW
IN
1
2
3
4
5
6
7
8
I
J PACKAGE
(LIMIT)
= 100 C,
SW PACKAGE
TOP VIEW
IN
) – V
JA
GND
T
= 100 C/W
JC
JMAX
NC
V
FB
f
C
= 130 C/W
– R
8-LEAD PLASTIC SO
1
2
3
4
= 100 C,
16
15
14
13
12
11
10
9
S8 PACKAGE
L
TOP VIEW
NC
NC
E2
V
E1
V
NC
NC
SW
IN
JA
= 130 C/W
8
7
6
5
E2
V
E1
V
SW
IN
(LIMIT)
ORDER PART
ORDER PART
LT1072CN8
LT1072CS8
LT1072MJ8
LT1072CJ8
LT1072CSW
MARKING
NUMBER
S8 PART
NUMBER
1072
LT1072 • POI01
1072fc