LT1175
absoluTe MaxiMuM raTings
(Note 1)
Input Voltage (Transient 1 sec, Note 11) ...................25V
Input Voltage (Continuous) .......................................20V
Input-to-Output Differential Voltage (Note 12) ..........20V
5V SENSE Pin (with Respect to GND Pin) ......... 2V, –10V
ADJ SENSE Pin
(with Respect to OUTPUT Pin)...................20V, –0.5V
5V SENSE Pin
(with Respect to OUTPUT Pin)......................20V, –7V
Output Reverse Voltage ..............................................2V
SHDN
Pin to GND Pin Voltage (Note 2) ........ 13.5V, –20V
SHDN
Pin to V
IN
Pin Voltage .............................30V, –5V
Operating Junction Temperature Range
LT1175C ................................................. 0°C to 125°C
LT1175I .............................................. –40°C to 125°C
Ambient Operating Temperature Range
LT1175C ................................................... 0°C to 70°C
LT1175I ................................................–40°C to 85°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................... 300°C
pin conFiguraTion
TOP VIEW
V
IN
1
I
LIM2
2
OUTPUT 3
SENSE 4
8
7
6
5
V
IN
I
LIM4
SHDN
GND
TAB
IS
V
IN
FRONT VIEW
5
4
3
2
1
SHDN
GND
V
IN
SENSE
OUTPUT
TAB IS
V
IN
FRONT VIEW
3
2
1
GND
V
IN
OUTPUT
N8 PACKAGE
8-LEAD PDIP
θ
JA
= 80°C/W TO 120°C/W
DEPENDING ON PC BOARD LAYOUT
TOP VIEW
V
IN
1
I
LIM2
2
OUTPUT 3
SENSE 4
8
7
6
5
V
IN
I
LIM4
SHDN
GND
Q PACKAGE
5-LEAD PLASTIC DD
θ
JA
= 27°C/W TO 60°C/W
DEPENDING ON PC MOUNTING.
SEE DATA SHEET FOR DETAILS
ST PACKAGE
3-LEAD PLASTIC SOT-223
θ
JA
= 50°C/W
WITH BACKPLANE AND 10cm
2
TOPSIDE LAND SOLDERED TO TAB
FRONT VIEW
5
4
3
2
1
TAB IS
V
IN
T PACKAGE
5-LEAD PLASTIC TO-220
θ
JA
= 50°C/W,
θ
JC
= 5°C/W
SHDN
GND
V
IN
SENSE
OUTPUT
S8 PACKAGE
8-LEAD PLASTIC SO
θ
JA
= 60°C/W TO 100°C/W
DEPENDING ON PC BOARD LAYOUT
PINS 1, 8 ARE INTERNALLY CONNECTED TO DIE ATTACH PADDLE FOR HEAT SINKING.
ELECTRICAL CONTACT CAN BE MADE TO EITHER PIN. FOR BEST THERMAL RESISTANCE,
PINS 1, 8 SHOULD BE CONNECTED TO AN EXPANDED LAND THAT IS OVER AN INTERNAL
OR BACKSIDE PLANE.
SEE APPLICATIONS INFORMATION
1175fe
LINER [ LINEAR TECHNOLOGY ]
