LT1074I Datasheet, PDF (2/16 Pages) Linear Technology – Step-Down Switching Regulator

LT1074/LT1076
ABSOLUTE AXI U RATI GS (Note 1)
Input Voltage
LT1074/ LT1076 .................................................. 45V
LT1074HV/LT1076HV ......................................... 64V
Switch Voltage with Respect to Input Voltage
LT1074/ LT1076 .................................................. 64V
LT1074HV/LT1076HV ......................................... 75V
Switch Voltage with Respect to Ground Pin (V_SW Negative)
LT1074/LT1076 (Note 7) ..................................... 35V
LT1074HV/LT1076HV (Note 7) ........................... 45V
Feedback Pin Voltage ..................................... –2V, +10V
Shutdown Pin Voltage (Not to Exceed V_IN) .............. 40V
I_LIM Pin Voltage (Forced) ............................................ 5.5V
Maximum Operating Ambient Temperature Range
Commercial ................................................. 0°C to 70°C
Industrial ................................................ –40°C to 85°C
Military (OBSOLETE) ..................... –55°C to 125°C
Maximum Operating Junction Temperature Range
Commercial ............................................... 0°C to 125°C
Industrial .............................................. –40°C to 125°C
Military (OBSOLETE) .................... – 55°C to 150°C
Maximum Storage Temperature ............... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) ...................... 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TAB IS
GND
FRONT VIEW
5
4
3
2
1
Q PACKAGE
5-LEAD PLASTIC DD
V_IN
V_SW
GND
V_C
FB/SENSE
LT1076: θ_JC = 4°C, θ_JA = 30°C/W
ORDER PART
NUMBER
LT1076CQ
LT1076IQ
TAB IS
GND
FRONT VIEW
7
6
5
4
3
2
1
R PACKAGE
7-LEAD PLASTIC DD
SHDN
V_C
FB/SENSE
GND
I_LIM
V_SW
V_IN
LT1076: θ_JC = 4°C, θ_JA = 30°C/W
LT1076CR
LT1076IR
LT1076HVCR
LT1076HVIR
TAB IS
GND
FRONT VIEW
7
6
5
4
3
2
1
T7 PACKAGE
7-LEAD PLASTIC TO-220
LT1074CT7
LT1074HVCT7
SHDN
V_{C LT1074IT7}
FB
GND
LT1074HVIT7
I_LIM
V_SW
LT1076CT7
V_{IN LT1076HVCT7}
BOTTOM VIEW
V_C
1
2
4
3
V_IN
CASE
IS GND
FB
V_SW
K PACKAGE
4-LEAD TO-3 METAL CAN
LT1074: θ_JC = 2.5°C, θ_JA = 35°C/W
LT1076: θ_JC = 4°C, θ_JA = 35°C/W
OBSOLETE PACKAGE
Consider the T5 Package for Alternate Source
TAB IS
GND
FRONT VIEW
5
V_IN
4
V_SW
3
GND
2
V_C
1
FB
T PACKAGE
5-LEAD PLASTIC TO-220
LEADS ARE FORMED STANDARD FOR
STRAIGHT LEADS, ORDER FLOW 06
LT1074: θ_JC = 2.5°C, θ_JA = 50°C/W
LT1076: θ_JC = 4°C, θ_JA = 50°C/W
LT1074: θ_JC = 2.5°C, θ_JA = 50°C/W
LT1076: θ_JC = 4°C, θ_JA = 50°C/W
*Assumes package is soldered to 0.5 IN² of 1 oz. copper over internal ground plane or over back side plane.
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ORDER PART
NUMBER
LT1074CK
LT1074HVCK
LT1074MK
LT1074HVMK
LT1076CK
LT1076HVCK
LT1076MK
LT1076HVMK
LT1074CT
LT1074HVCT
LT1074IT
LT1074HVIT
LT1076CT
LT1076HVCT
LT1076IT
LT1076HVIT
2
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