LT1175I Linear Technology, LT1175I Datasheet - Page 2

• Manufacturer Part Number: LT1175I
• Description: 500mA Negative Low Dropout Micropower Regulator
• Manufacturer: Linear Technology

ABSOLUTE
PACKAGE/ORDER
LT1175
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
5V SENSE Pin
Output Reverse Voltage ............................................ 2V
SHDN Pin to GND Pin Voltage (Note 2) ..... 13.5V, – 20V
Consult factory for Military grade parts.
range, otherwise specifications are at T
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.
2
ELECTRICAL CHARACTERISTICS
PARAMETER
Feedback Sense Voltage
Output Voltage Initial Accuracy
Output Voltage Accuracy (All Conditions)
Quiescent Input Supply Current
OUTPUT
OUTPUT
ON PC BOARD LAYOUT
ON PC BOARD LAYOUT
SENSE
JA
SENSE
(with Respect to OUTPUT Pin) ................ 20V, – 0.5V
(with Respect to OUTPUT Pin) .................. 20V, – 7V
JA
I
I
LIM2
LIM2
= 60 C/ W TO 100 C/W DEPENDING
V
V
= 80 C/ W TO 120 C/W DEPENDING
IN
IN
1
2
3
4
1
2
3
4
8-LEAD PLASTIC SO
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
TOP VIEW
TOP VIEW
8
7
6
5
8
7
6
5
W
MAXIMUM
V
I
SHDN
GND
V
I
SHDN
GND
LIM4
LIM4
IN
IN
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
PART NUMBER
W W
LT1175CN8
LT1175CN8-5
LT1175IN8
LT1175IN8-5
ORDER
INFORMATION
U
A
= 25 C. V
RATINGS
CONDITIONS
Adjustable Part
Fixed 5V Part
Adjustable, Measured at 3.8V Sense
Fixed 5V
V
P = 0 to P
V
IN
IN
– V
– V
W
INPUT
TAB
ON PC MOUNTING. SEE DATA SHEET
FOR DETAILS
OUT
OUT
JA
IS
U
S8 PART MARKING
1175
11755
OUT
= 27 C/ W TO 60 C/W DEPENDING
MAX
PART NUMBER
= 1V to V
5-LEAD PLASTIC DD
LT1175CS8
LT1175CS8-5
LT1175IS8
LT1175IS8-5
= 5V, V
12V
, T
FRONT VIEW
Q PACKAGE
ORDER
J
The
= T
U
5
4
3
2
1
(Note 1)
IN
MIN
IN
= 20V, I
1175I
1175I5
= 7V, I
to T
denotes specifications which apply over the operating temperature
SHDN
GND
INPUT
SENSE
OUTPUT
MAX
SHDN Pin to V
Operating Junction Temperature Range
Ambient Operating Temperature Range
Storage Temperature Range ................. – 65 C to 150 C
Lead Temperature (Soldering, 10 sec).................. 300 C
OUT
OUT
(Note 3)
= 0A to 500mA
LT1175C .............................................. 0 C to 125 C
LT1175I .......................................... – 40 C to 125 C
LT1175C ................................................ 0 C to 70 C
LT1175I ............................................ – 40 C to 85 C
= 0, V
PART NUMBER
LT1175CQ
LT1175CQ-5
LT1175IQ
LT1175IQ-5
ORDER
SHDN
TAB IS
INPUT
JA
5-LEAD PLASTIC TO-220
= 3V, I
IN
= 50 C/ W,
Pin Voltage .......................... 30V, – 5V
FRONT VIEW
T PACKAGE
LIM2
TAB IS
5
4
3
2
1
INPUT
AND 10cm
SOLDERED TO TAB
JC
JA
3-LEAD PLASTIC SOT-223
= 5 C/ W
= 50 C/ W WITH BACKPLANE
and I
3.743
FRONT VIEW
4.93
ST PACKAGE
MIN
2
TOPSIDE LAND
LIM4
SHDN
INPUT
OUTPUT
tied to V
1
2
3
GND
SENSE
TYP
3.8
5.0
0.5
0.5
1.5
GND
V
OUTPUT
45
IN
IN
, T
PART NUMBER
PART NUMBER
3.857
5.075
MAX
LT1175CST-5
LT1175IST-5
1.5
1.5
2.5
J
65
80
LT1175CT
LT1175CT-5
LT1175IT
LT1175IT-5
= 25 C,
ORDER
ORDER
UNITS
%
%
%
V
V
A
A