LT1129IQ-3.3#TRPBF

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Analog Devices Inc./Maxim Integrated

MICROPOWER LOW DROPOUT REGULATORS WITH SHUTDOWN

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LT1129IQ-3.3#TRPBF

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Analog Devices Inc./Maxim Integrated

MICROPOWER LOW DROPOUT REGULATORS WITH SHUTDOWN

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Description Specifications Series Pricing CAD Documents

Description

General part information

LT1129 Series

The LT1129/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 ﬂow 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 ﬂow 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.ApplicationsLow Current RegulatorRegulator for Battery-Powered SystemsPost Regulator for Switching Supplies5V to 3.3V Logic Regulator

Technical Specifications

Parameters and characteristics for this part

Specification	LT1129IQ-3.3#TRPBF

Control Features	Enable
Current - Output	700 mA
Current - Quiescent (Iq)	70 µA
Current - Supply (Max)	90 mA
Mounting Type	Surface Mount
Number of Regulators	1
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive
Output Type	Fixed
Package Leads	5 Leads
Package Name	DDPAK-5, D2PAK
Protection Features	Reverse Polarity, Over Temperature
PSRR	64 dB
Voltage - Input (Max)	30 V p-p
Voltage - Output (Min/Fixed)	3.3 V
Voltage Dropout (Max)	0.7 V

LT1129 Series

Part	Current - Supply (Max)	Voltage - Input (Max)	Voltage - Output (Min/Fixed)	Operating Temperature (Max)	Operating Temperature (Min)	Mounting Type	Output Configuration	Output Type	Protection Features	Current - Output	Voltage Dropout (Max)	Current - Quiescent (Iq)	Package / Case	PSRR	Package Name	Control Features	Number of Regulators	Package Length	Package Width	Voltage - Output (Max)
Analog Devices Inc./Maxim Integrated LT1129IT-5#06PBF	90 mA	30 V p-p	5 V	125 °C	-40 °C	Through Hole	Positive	Fixed	Over Temperature Reverse Polarity	700 mA	0.7 V	70 µA	TO-220-5	64 dB	TO-220-5 Flow 6	Enable	1
Analog Devices Inc./Maxim Integrated LT1129IST-3.3#PBF	90 mA	30 V p-p	3.3 V	125 °C	-40 °C	Surface Mount	Positive	Fixed	Over Temperature Reverse Polarity	700 mA	0.7 V	70 µA	TO-261-4 TO-261AA	64 dB	SOT-223-3	Enable	1
Analog Devices Inc./Maxim Integrated LT1129IT-5#PBF	90 mA	30 V p-p	5 V	125 °C	-40 °C	Through Hole	Positive	Fixed	Over Temperature Reverse Polarity	700 mA	0.7 V	70 µA	TO-220-5	64 dB	TO-220-5	Enable	1
Analog Devices Inc./Maxim Integrated LT1129CT-3.3#PBF	90 mA	30 V p-p	3.3 V	125 °C	0 °C	Through Hole	Positive	Fixed	Over Temperature Reverse Polarity	700 mA	0.7 V	70 µA	TO-220-5	64 dB	TO-220-5	Enable	1
Analog Devices Inc./Maxim Integrated LT1129CS8#TRPBF	90 mA	30 V p-p	3.8 V	125 °C	0 °C	Surface Mount	Positive	Adjustable	Over Temperature Reverse Polarity	700 mA	0.7 V	70 µA		64 dB	8-SO 8-SOIC	Enable	1	0.154 in	3.9 mm	30 V
Analog Devices Inc./Maxim Integrated LT1129MPST-3.3#PBF	90 mA	30 V p-p	3.3 V	125 °C	-55 °C	Surface Mount	Positive	Fixed	Over Temperature Reverse Polarity	700 mA	0.7 V	70 µA	TO-261-4 TO-261AA	64 dB	SOT-223-3	Enable	1
Analog Devices Inc./Maxim Integrated LT1129CST-5#TRPBF	90 mA	30 V p-p	5 V	125 °C	0 °C	Surface Mount	Positive	Fixed	Over Temperature Reverse Polarity	700 mA	0.7 V	70 µA	TO-261-4 TO-261AA	64 dB	SOT-223-3	Enable	1
Analog Devices Inc./Maxim Integrated LT1129CST-3.3#PBF	90 mA	30 V p-p	3.3 V	125 °C	0 °C	Surface Mount	Positive	Fixed	Over Temperature Reverse Polarity	700 mA	0.7 V	70 µA	TO-261-4 TO-261AA	64 dB	SOT-223-3	Enable	1
Analog Devices Inc./Maxim Integrated LT1129CS8-5#PBF	90 mA	30 V p-p	5 V	125 °C	0 °C	Surface Mount	Positive	Fixed	Over Temperature Reverse Polarity	700 mA	0.7 V	70 µA		64 dB	8-SO 8-SOIC	Enable	1	0.154 in	3.9 mm
Analog Devices Inc./Maxim Integrated LT1129IS8-5#TRPBF	90 mA	30 V p-p	5 V	125 °C	-40 °C	Surface Mount	Positive	Fixed	Over Temperature Reverse Polarity	700 mA	0.7 V	70 µA		64 dB	8-SO 8-SOIC	Enable	1	0.154 in	3.9 mm

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

LT1129IQ-3.3#TRPBF | Datasheet

Tape and Reel Packaging

R086 Reliability Data