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LT1175IST-5#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
LT1175
1
1175ff
TYPICAL APPLICATION
FEATURES DESCRIPTION
500mA Negative
Low Dropout Micropower
Regulator
The LT
®
1175 is a negative micropower low dropout
regulator. It features 45μA quiescent current, dropping
to 10μA in shutdown. A new reference amplifi er topology
gives precision DC characteristics along with the ability to
maintain good loop stability with an extremely wide range
of output capacitors. Very low dropout voltage and high
effi ciency are obtained with a unique power transistor
anti-saturation design. Adjustable and fi xed 5V versions
are available.
Several new features make the LT1175 very user-friendly.
The SHDN pin can interface directly to either positive or
negative logic levels. Current limit is user-selectable at
200mA, 400mA, 600mA and 800mA. The output can be
forced to reverse voltage without damage or latchup. Un-
like some earlier designs, the increase in quiescent current
during a dropout condition is actively limited.
The LT1175 has complete blowout protection with current
limiting, power limiting and thermal shutdown. Special
attention was given to the problem of high temperature
operation with micropower operating currents,
preventing
output voltage rise under no-load conditions. The LT1175
is available in 8-pin PDIP and SO packages, 3-lead SOT-
223 as well as 5-pin surface mount DD and through-hole
TO-220 packages. The 8-pin SO package is specially
constructed for low thermal resistance.
Typical LT1175 Connection
APPLICATIONS
n
Operating Current: 45μA
n
Adjustable Current Limit
n
Low Voltage Linear Dropout Characteristics
n
Stable with Wide Range of Output Capacitors
n
Shutdown Current: 10μA
n
Positive or Negative Shutdown Logic
n
Fixed 5V and Adjustable Versions
n
Tolerates Reverse Output Voltage
n
Available in 8-pin PDIP and SO Packages, 3-lead
SOT-223, 5-Pin Surface Mount DD and Through-Hole
TO-220 Packages
n
Analog Systems
n
Modems
n
Instrumentation
n
A/D and D/A Converters
n
Interface Drivers
n
Battery-Powered Systems
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Minimum Input-to-Output Voltage
C
IN
*
*C
IN
IS NEEDED ONLY IF REGULATOR IS MORE THAN 6" FROM
INPUT SUPPLY CAPACITOR. SEE APPLICATIONS INFORMATION
SECTION FOR DETAILS
C
OUT
≥ 0.1μF
–5V
UP TO 500mA
–V
IN
SHDN GND
LT1175-5
SENSE
OUTPUT
1175 TA01
I
LIM4
I
LIM2
V
IN
+ +
OUTPUT CURRENT (A)
0
INPUT-TO-OUTPUT VOLTAGE (V)
1.0
0.8
0.6
0.4
0.2
0
0.2
0.4
0.5
1175 TA02
0.1
0.3
0.6
0.7
T
J
= 25°C
I
LIM2
, I
LIM4
TIED TO V
IN
LT1175
2
1175ff
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Transient 1 sec, Note 12) ...................25V
Input Voltage (Continuous) .......................................20V
Input-to-Output Differential Voltage (Note 13) ..........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
PIN CONFIGURATION
Output Reverse Voltage ..............................................2V
SHDN Pin to GND Pin Voltage (Note 3) ........13.5V, –20V
SHDN Pin to V
IN
Pin Voltage .............................30V, –5V
Operating Junction Temperature Range (Note 2)
LT1175C ................................................. 0°C to 125°C
LT1175I .............................................. –40°C to 125°C
LT1175MP .......................................... –55°C to 125°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................... 300°C
1
2
3
4
8
7
6
5
TOP VIEW
V
IN
I
LIM2
OUTPUT
SENSE
V
IN
I
LIM4
SHD
N
GND
N8 PACKAGE
8-LEAD PDIP
θ
JA
= 80°C/W TO 120°C/W
DEPENDING ON PC BOARD LAYOUT
SHDN
GND
V
IN
SENSE
OUTPUT
Q PACKAGE
5-LEAD PLASTIC DD-PAK
FRONT VIEW
TAB
IS
V
IN
5
4
3
2
1
θ
JA
= 27°C/W TO 60°C/W
DEPENDING ON PC MOUNTING.
SEE DATA SHEET FOR DETAILS
3
2
1
FRONT VIEW
TAB IS
V
IN
GND
V
IN
OUTPUT
ST PACKAGE
3-LEAD PLASTIC SOT-223
θ
JA
= 50°C/W
WITH BACKPLANE AND 10cm
2
TOPSIDE LAND SOLDERED TO TAB
1
2
3
4
8
7
6
5
TOP VIEW
S8 PACKAGE
8-LEAD PLASTIC SO
V
IN
I
LIM2
OUTPUT
SENSE
V
IN
I
LIM4
SHD
N
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
T PACKAGE
5-LEAD PLASTIC TO-220
FRONT VIEW
5
4
3
2
1
SHDN
GND
V
IN
SENSE
OUTPUT
TAB IS
V
IN
θ
JA
= 50°C/W, θ
JC
= 5°C/W
(Note 1)
LT1175
3
1175ff
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT1175CN8#PBF LT1175CN8#TRPBF LT1175CN8 8-Lead Plastic Dip 0°C to 125°C
LT1175CN8-5#PBF LT1175CN8-5#TRPBF LT1175CN8-5 8-Lead Plastic Dip 0°C to 125°C
LT1175CS8#PBF LT1175CS8#TRPBF 1175 8-Lead Plastic SO 0°C to 125°C
LT1175CS8-5#PBF LT1175CS8-5#TRPBF 11755 8-Lead Plastic SO 0°C to 125°C
LT1175CST-5#PBF LT1175CST-5#TRPBF 11755 3-Lead Plastic SOT-223 0°C to 125°C
LT1175CQ#PBF LT1175CQ#TRPBF LT1175CQ 5-Lead Plastic DD-Pak 0°C to 125°C
LT1175CQ-5#PBF LT1175CQ-5#TRPBF LT1175CQ-5 5-Lead Plastic DD-Pak 0°C to 125°C
LT1175CT#PBF LT1175CT#TRPBF LT1175CT 5-Lead Plastic TO-220 0°C to 125°C
LT1175CT-5#PBF LT1175CT-5#TRPBF LT1175CT-5 5-Lead Plastic TO-220 0°C to 125°C
LT1175IN8#PBF LT1175IN8#TRPBF LT1175IN8 8-Lead Plastic Dip –40°C to 125°C
LT1175IN8-5#PBF LT1175IN8-5#TRPBF LT1175IN8-5 8-Lead Plastic Dip –40°C to 125°C
LT1175IS8#PBF LT1175IS8#TRPBF 1175I 8-Lead Plastic SO –40°C to 125°C
LT1175IS8-5#PBF LT1175IS8-5#TRPBF 1175I5 8-Lead Plastic SO –40°C to 125°C
LT1175IST-5#PBF LT1175IST-5#TRPBF 1175I5 3-Lead Plastic SOT-223 –40°C to 125°C
LT1175IQ#PBF LT1175IQ#TRPBF LT1175IQ 5-Lead Plastic DD-Pak –40°C to 125°C
LT1175IQ-5#PBF LT1175IQ-5#TRPBF LT1175IQ-5 5-Lead Plastic DD-Pak –40°C to 125°C
LT1175IT#PBF LT1175IT#TRPBF LT1175IT 5-Lead Plastic TO-220 –40°C to 125°C
LT1175IT-5#PBF LT1175IT-5#TRPBF LT1175IT-5 5-Lead Plastic TO-220 –40°C to 125°C
LT1175MPS8#PBF LT1175MPS8#TRPBF 1175MP 8-Lead Plastic SO –55°C to 125°C
LT1175MPS8-5#PBF LT1175MPS8-5#TRPBF 175MP5 8-Lead Plastic SO –55°C to 125°C
LT1175MPQ#PBF LT1175MPQ#TRPBF LT1175MPQ 5-Lead Plastic DD-Pak –55°C to 125°C
LT1175MPQ-5#PBF LT1175MPQ-5#TRPBF LT1175MPQ-5 5-Lead Plastic DD-Pak –55°C to 125°C
LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT1175CN8 LT1175CN8#TR LT1175CN8 8-Lead Plastic Dip 0°C to 125°C
LT1175CN8-5 LT1175CN8-5#TR LT1175CN8-5 8-Lead Plastic Dip 0°C to 125°C
LT1175CS8 LT1175CS8#TR 1175 8-Lead Plastic SO 0°C to 125°C
LT1175CS8-5 LT1175CS8-5#TR 11755 8-Lead Plastic SO 0°C to 125°C
LT1175CST-5 LT1175CST-5#TR 11755 3-Lead Plastic SOT-223 0°C to 125°C
LT1175CQ LT1175CQ#TR LT1175CQ 5-Lead Plastic DD-Pak 0°C to 125°C
LT1175CQ-5 LT1175CQ-5#TR LT1175CQ-5 5-Lead Plastic DD-Pak 0°C to 125°C
LT1175CT LT1175CT#TR LT1175CT 5-Lead Plastic TO-220 0°C to 125°C
LT1175CT-5 LT1175CT-5#TR LT1175CT-5 5-Lead Plastic TO-220 0°C to 125°C
LT1175IN8 LT1175IN8#TR LT1175IN8 8-Lead Plastic Dip –40°C to 125°C
LT1175IN8-5 LT1175IN8-5#TR LT1175IN8-5 8-Lead Plastic Dip –40°C to 125°C
LT1175IS8 LT1175IS8#TR 1175I 8-Lead Plastic SO –40°C to 125°C
LT1175IS8-5 LT1175IS8-5#TR 1175I5 8-Lead Plastic SO –40°C to 125°C
LT1175IST-5 LT1175IST-5#TR 1175I5 3-Lead Plastic SOT-223 –40°C to 125°C
LT1175IQ LT1175IQ#TR LT1175IQ 5-Lead Plastic DD-Pak –40°C to 125°C
LT1175IQ-5 LT1175IQ-5#TR LT1175IQ-5 5-Lead Plastic DD-Pak –40°C to 125°C
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

LT1175IST-5#PBF

Mfr. #:
Buy LT1175IST-5#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
LDO Voltage Regulators 5V 500mA Neg Low Dropout Reg
Lifecycle:
New from this manufacturer.
Delivery:
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