LT1175
ABSOLUTE
MAXIMUM
RATINGS
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
PACKAGE/ORDER INFORMATION
TOP VIEW
V
IN
1
I
LIM2
2
OUTPUT 3
SENSE 4
N8 PACKAGE
8-LEAD PDIP
8
7
6
5
V
IN
I
LIM4
SHDN
GND
ORDER
PART NUMBER
LT1175CN8
LT1175CN8-5
LT1175IN8
LT1175IN8-5
TAB
IS
INPUT
FRONT VIEW
5
4
3
2
1
Q PACKAGE
5-LEAD PLASTIC DD
SHDN
GND
INPUT
SENSE
OUTPUT
θ
JA
= 80°C/ W TO 120°C/W DEPENDING
ON PC BOARD LAYOUT
θ
JA
= 27°C/ W TO 60°C/W DEPENDING
ON PC MOUNTING. SEE DATA SHEET
FOR DETAILS
TOP VIEW
V
IN
1
I
LIM2
2
OUTPUT 3
SENSE 4
8
7
6
5
S8 PACKAGE
8-LEAD PLASTIC SO
V
IN
I
LIM4
SHDN
GND
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
ORDER
PART NUMBER
LT1175CS8
LT1175CS8-5
LT1175IS8
LT1175IS8-5
S8 PART MARKING
1175
11755
1175I
1175I5
Consult LTC Marketing for parts specified with wider operating temperature ranges.
The
●
denotes specifications which apply over the operating temperature
range, otherwise specifications are at T
A
= 25°C. V
OUT
= 5V, V
IN
= 7V, I
OUT
= 0, V
SHDN
= 3V, I
LIM2
and I
LIM4
tied to V
IN
, T
J
= 25°C,
unless otherwise noted. To avoid confusion with “min” and “max” as applied to negative voltages, all voltages are shown as
absolute values except where polarity is not obvious.
PARAMETER
Feedback Sense Voltage
Output Voltage Initial Accuracy
Output Voltage Accuracy (All Conditions)
Quiescent Input Supply Current
CONDITIONS
Adjustable Part
Fixed 5V Part
Adjustable, Measured at 3.8V Sense
Fixed 5V
V
IN
– V
OUT
= 1V to V
IN
= 20V, I
OUT
= 0A to 500mA
P = 0 to P
MAX
, T
J
= T
MIN
to T
MAX
(Note 3)
V
IN
– V
OUT
≤
12V
MIN
3.743
4.93
TYP
3.8
5.0
0.5
0.5
1.5
45
●
ELECTRICAL CHARACTERISTICS
2
U
U
W
W W
U
W
(Note 1)
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
ORDER
PART NUMBER
LT1175CQ
LT1175CQ-5
LT1175IQ
LT1175IQ-5
TAB IS
INPUT
FRONT VIEW
3
2
1
GND
V
IN
OUTPUT
ORDER
PART NUMBER
LT1175CST-5
LT1175IST-5
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
INPUT
SHDN
GND
INPUT
SENSE
OUTPUT
ORDER
PART NUMBER
LT1175CT
LT1175CT-5
LT1175IT
LT1175IT-5
T PACKAGE
5-LEAD PLASTIC TO-220
θ
JA
= 50°C/ W,
θ
JC
= 5°C/ W
●
MAX
3.857
5.075
1.5
1.5
2.5
65
80
UNITS
V
V
%
%
%
µA
µA
1175fd
LINER [ LINEAR TECHNOLOGY ]
