OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

LT1129IST-5#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
LT1129/LT1129-3.3/LT1129-5
1
112935ff
TYPICAL APPLICATION
DESCRIPTION
Micropower Low Dropout
Regulators with Shutdown
The LT
®
1129/LT1129-3.3/LT1129-5 are micropower low
dropout regulators with shutdown. The devices are capable
of supplying 700mA of output current with a dropout
voltage of 400mV at maximum output. Designed for use
in battery-powered systems, the low quiescent current,
50μA operating and 16μA in shutdown, make them an ideal
choice. The quiescent current does not rise in dropout as
it does with many other low dropout PNP regulators.
Other features of the LT1129 /LT1129-3.3/LT1129-5 include
the ability to operate with small output capacitors. They
are stable with only 3.3μF on the output while most older
devices require between 10μF and 100μF for stability. Also
the input may be connected to ground or a reverse voltage
without reverse current fl ow from output to input. This
makes the LT1129/LT1129-3.3/LT1129-5 ideal for backup
power situations where the output is held high and the
input is at ground or reversed. Under these conditions,
only 16μA will fl ow from the output pin to ground. The
devices are available in 5-lead TO-220, 5-lead DD-Pak and
3-lead SOT-223 packages.
FEATURES
APPLICATIONS
n
400mV Dropout Voltage
n
700mA Output Current
n
50μA Quiescent Current
n
No Protection Diodes Needed
n
Adjustable Output from 3.8V to 30V
n
3.3V and 5V Fixed Output Voltages
n
Controlled Quiescent Current in Dropout
n
Shutdown
n
16μA Quiescent Current in Shutdown
n
Stable with 3.3μF Output Capacitor
n
Reverse Battery Protection
n
No Reverse Output Current
n
Thermal Limiting
n
Surface Mount SOT-223 and DD-Pak Packages
n
Low Current Regulator
n
Regulator for Battery-Powered Systems
n
Post Regulator for Switching Supplies
n
5V to 3.3V Logic Regulator
5V Supply with Shutdown
IN OUT
LT1129-5
GND
5V OUT
500mA
V
IN
> 5.5V
3.3μF
SOLID TANTALUM
+
SENSE
112935 TA01
V
SHDN
(PIN 4)
< 0.25
> 2.8
NC
OUTPUT
OFF
ON
ON
SHDN
1
2
3
4
5
OUTPUT CURRENT (A)
0
DROPOUT VOLTAGE (V)
0.4
0.5
0.6
0.3 0.5
0.3
0.2
0.1 0.2
0.4 0.6 0.7
0.1
0
112935 TA02
Dropout Voltage
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
LT1129/LT1129-3.3/LT1129-5
2
112935ff
ABSOLUTE MAXIMUM RATINGS
Input Voltage ...................................................... ± 30V*
Output Pin Reverse Current ................................. 10mA
Sense Pin Current ................................................ 10mA
Adjust Pin Current ................................................ 10mA
Sense Pin, Adjust Pin Reverse Voltage ............... – 0.6V
Shutdown Pin Input Voltage (Note 2) ......... 6.5V, – 0.6V
Shutdown Pin Input Current (Note 2) .................. 20mA
Output Short-Circuit Duration .......................... Indefi nite
(Note 1)
Storage Temperature Range .................. – 65°C to 150°C
Operating Junction Temperature Range (Note 3)
LT1129C-X .......................................... 0°C to 125°C
LT1129C-X Extended Temperature Range
(Note 12) ....................................... –40°C to 125°C
LT1129I-X(Note 12) ......................... –40°C to 125°C
LT1129MP-X(Note 12) ..................... –55°C to 125°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
* For applications requiring input voltage ratings greater than 30V, contact the factory.
1
2
3
4
5
6
7
8
9
10
TOP VIEW
F PACKAGE
20-LEAD PLASTIC TSSOP
20
19
18
17
16
15
14
13
12
11
GND
GND
GND
GND
GND
GND
OUT
SENSE
GND
GND
GND
GND
GND
GND
GND
GND
IN
SHDN
GND
GND
NOTE: ALL GROUND PINS ARE INTERNALLY CONNECTED
θ
JA
= 40°C/W
OBSOLETE PACKAGE
Q PACKAGE
5-LEAD PLASTIC DD
FRONT VIEW
V
IN
SHDN
GND
SENSE/ADJ*
OUTPUT
5
4
3
2
1
TAB
IS
GND
*PIN 2 = SENSE FOR LT1129-3.3/LT1129-5
= ADJ FOR LT1129
θ
JA
= 30°C/W
1
2
3
4
8
7
6
5
TOP VIEW
OUTPUT
GND
NC
S8 PACKAGE
8-LEAD PLASTIC SO
V
IN
GND
GND
SHDN
SENSE/
ADJ*
*PIN 2 = SENSE FOR LT1129-3.3/LT1129-5
= ADJ FOR LT1129
θ
JA
= 60°C/W
3
2
1
FRONT VIEW
TAB
IS
GND
ST PACKAGE
3-LEAD PLASTIC SOT-223
OUTPUT
GND
V
IN
θ
JA
= 50°C/W
T PACKAGE
5-LEAD PLASTIC TO-220
V
IN
SHDN
GND
SENSE/ADJ*
OUTPUT
FRONT VIEW
5
4
3
2
1
TAB
IS
GND
*PIN 2 = SENSE FOR LT1129-3.3/LT1129-5 = ADJ FOR LT1129
θ
JA
= 50°C/W
PIN CONFIGURATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT1129CS8#PBF LT1129CS8#TRPBF 1129 8-Lead Plastic SO 0°C to 125°C
LT1129IS8#PBF LT1129IS8#TRPBF 1129I 8-Lead Plastic SO –40°C to 125°C
LT1129CS8-3.3#PBF LT1129CS8-3.3#TRPBF 11293 8-Lead Plastic SO 0°C to 125°C
LT1129IS8-3.3#PBF LT1129IS8-3.3#TRPBF 1129I3 8-Lead Plastic SO –40°C to 125°C
LT1129CS8-5#PBF LT1129CS8-5#TRPBF 11295 8-Lead Plastic SO 0°C to 125°C
ORDER INFORMATION
LT1129/LT1129-3.3/LT1129-5
3
112935ff
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT1129IS8-5#PBF LT1129IS8-5#TRPBF 1129I5 8-Lead Plastic SO –40°C to 125°C
LT1129CST-3.3#PBF LT1129CST-3.3#TRPBF 11293 3-Lead Plastic SOT-223 0°C to 125°C
LT1129IST-3.3#PBF LT1129IST-3.3#TRPBF 129I3 3-Lead Plastic SOT-223 –40°C to 125°C
LT1129MPST-3.3#PBF LT1129MPST-3.3#TRPBF 129MP3 3-Lead Plastic SOT-223 –55°C to 125°C
LT1129CST-5#PBF LT1129CST-5#TRPBF 11295 3-Lead Plastic SOT-223 0°C to 125°C
LT1129IST-5#PBF LT1129IST-5#TRPBF 129I5 3-Lead Plastic SOT-223 –40°C to 125°C
LT1129CQ#PBF LT1129CQ#TRPBF LT1129CQ 5-Lead Plastic DD-PAK 0°C to 125°C
LT1129IQ#PBF LT1129IQ#TRPBF LT1129IQ 5-Lead Plastic DD-PAK –40°C to 125°C
LT1129CQ-3.3#PBF LT1129CQ-3.3#TRPBF LT1129CQ-3.3 5-Lead Plastic DD-PAK 0°C to 125°C
LT1129IQ-3.3#PBF LT1129IQ-3.3#TRPBF LT1129IQ-3.3 5-Lead Plastic DD-PAK –40°C to 125°C
LT1129CQ-5#PBF LT1129CQ-5#TRPBF LT1129CQ-5 5-Lead Plastic DD-PAK 0°C to 125°C
LT1129IQ-5#PBF LT1129IQ-5#TRPBF LT1129IQ-5 5-Lead Plastic DD-PAK –40°C to 125°C
LT1129CT#PBF LT1129CT#TRPBF LT1129CT 5-Lead Plastic TO-220 0°C to 125°C
LT1129IT#PBF LT1129IT#TRPBF LT1129IT 5-Lead Plastic TO-220 –40°C to 125°C
LT1129CT-3.3#PBF LT1129CT-3.3#TRPBF LT1129CT-3.3 5-Lead Plastic TO-220 0°C to 125°C
LT1129IT-3.3#PBF LT1129IT-3.3#TRPBF LT1129IT-3.3 5-Lead Plastic TO-220 –40°C to 125°C
LT1129CT-5#PBF LT1129CT-5#TRPBF LT1129CT-5 5-Lead Plastic TO-220 0°C to 125°C
LT1129IT-5#PBF LT1129IT-5#TRPBF LT1129IT-5 5-Lead Plastic TO-220 –40°C to 125°C
LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT1129CS8 LT1129CS8#TR 1129 8-Lead Plastic SO 0°C to 125°C
LT1129IS8 LT1129IS8#TR 1129I 8-Lead Plastic SO –40°C to 125°C
LT1129CS8-3.3 LT1129CS8-3.3#TR 11293 8-Lead Plastic SO 0°C to 125°C
LT1129IS8-3.3 LT1129IS8-3.3#TR 1129I3 8-Lead Plastic SO –40°C to 125°C
LT1129CS8-5 LT1129CS8-5#TR 11295 8-Lead Plastic SO 0°C to 125°C
LT1129IS8-5 LT1129IS8-5#TR 1129I5 8-Lead Plastic SO –40°C to 125°C
LT1129CST-3.3 LT1129CST-3.3#TR 11293 3-Lead Plastic SOT-223 0°C to 125°C
LT1129IST-3.3 LT1129IST-3.3#TR 129I3 3-Lead Plastic SOT-223 –40°C to 125°C
LT1129MPST-3.3 LT1129MPST-3.3#TR 129MP3 3-Lead Plastic SOT-223 –55°C to 125°C
LT1129CST-5 LT1129CST-5#TR 11295 3-Lead Plastic SOT-223 0°C to 125°C
LT1129IST-5 LT1129IST-5#TR 129I5 3-Lead Plastic SOT-223 –40°C to 125°C
LT1129CQ LT1129CQ#TR LT1129CQ 5-Lead Plastic DD-PAK 0°C to 125°C
LT1129IQ LT1129IQ#TR LT1129IQ 5-Lead Plastic DD-PAK –40°C to 125°C
LT1129CQ-3.3 LT1129CQ-3.3#TR LT1129CQ-3.3 5-Lead Plastic DD-PAK 0°C to 125°C
LT1129IQ-3.3 LT1129IQ-3.3#TR LT1129IQ-3.3 5-Lead Plastic DD-PAK –40°C to 125°C
LT1129CQ-5 LT1129CQ-5#TR LT1129CQ-5 5-Lead Plastic DD-PAK 0°C to 125°C
LT1129IQ-5 LT1129IQ-5#TR LT1129IQ-5 5-Lead Plastic DD-PAK –40°C to 125°C
LT1129CT LT1129CT#TR LT1129CT 5-Lead Plastic TO-220 0°C to 125°C
LT1129IT LT1129IT#TR LT1129IT 5-Lead Plastic TO-220 –40°C to 125°C
LT1129CT-3.3 LT1129CT-3.3#TR LT1129CT-3.3 5-Lead Plastic TO-220 0°C to 125°C
LT1129IT-3.3 LT1129IT-3.3#TR LT1129IT-3.3 5-Lead Plastic TO-220 –40°C to 125°C
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LT1129IST-5#PBF

Mfr. #:
Buy LT1129IST-5#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
LDO Voltage Regulators 700mA Micropower Low Dropout Regulator with Shutdown
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet