Integrated Circuits (ICs)

LT1129CQ-3.3#PBF

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Analog Devices

LDO VOLTAGE REGULATOR, FIXED, 4.15 V TO 30 V IN, 0.45 V / 0.7 A OUT, TO-263-5

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Integrated Circuits (ICs)

LT1129CQ-3.3#PBF

Active

Analog Devices

LDO VOLTAGE REGULATOR, FIXED, 4.15 V TO 30 V IN, 0.45 V / 0.7 A OUT, TO-263-5

Deep-Dive with AI

DocumentsDatasheet R086 Reliability Data

Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LT1129CQ-3.3#PBF

Control Features	Enable
Current - Output	700 mA
Current - Quiescent (Iq)	70 µA
Mounting Type	Surface Mount
Number of Regulators	1
Operating Temperature [Max]	125 °C
Operating Temperature [Min]	0 °C
Output Configuration	Positive
Output Type	1.81 mOhm
Package / Case	TO-263-6, TO-263BA, D2PAK (5 Leads + Tab)
Protection Features	Reverse Polarity, Over Temperature
PSRR	64 dB
Supplier Device Package	DDPAK-5
Voltage - Input (Max) [Max]	30 V
Voltage - Output (Min/Fixed)	3.3 V
Voltage Dropout (Max) [Max]	0.7 V

LT1129 Series

Micropower Low Dropout Regulators with Shutdown

Part	Output Configuration	PSRR	Supplier Device Package	Output Type	Mounting Type	Operating Temperature [Max]	Operating Temperature [Min]	Current - Quiescent (Iq)	Voltage - Input (Max) [Max]	Control Features	Protection Features	Voltage - Output (Min/Fixed)	Current - Output	Number of Regulators	Package / Case	Voltage Dropout (Max) [Max]	Package / Case [y]	Package / Case [x]	Output Type	Voltage - Output (Max) [Max]
Analog Devices LT1129IT-5#06PBF	Positive	64 dB	TO-220-5 Flow 6	1.81 mOhm	Through Hole	125 °C	-40 °C	70 µA	30 V	Enable	Over Temperature Reverse Polarity	5 V	700 mA	1	TO-220-5	0.7 V
Analog Devices LT1129IST-3.3#PBF	Positive	64 dB	SOT-223-3	1.81 mOhm	Surface Mount	125 °C	-40 °C	70 µA	30 V	Enable	Over Temperature Reverse Polarity	3.3 V	700 mA	1	TO-261-4 TO-261AA	0.7 V
Analog Devices LT1129CST-5#TRPBF	Positive	64 dB	SOT-223-3	1.81 mOhm	Surface Mount	125 °C	0 °C	70 µA	30 V	Enable	Over Temperature Reverse Polarity	5 V	700 mA	1	TO-261-4 TO-261AA	0.7 V
Analog Devices LT1129IS8-5#TRPBF	Positive	64 dB	8-SO	1.81 mOhm	Surface Mount	125 °C	-40 °C	70 µA	30 V	Enable	Over Temperature Reverse Polarity	5 V	700 mA	1	8-SOIC	0.7 V	3.9 mm	0.154 in
Analog Devices LT1129IST-3.3#TRPBF	Positive	64 dB	SOT-223-3	1.81 mOhm	Surface Mount	125 °C	-40 °C	70 µA	30 V	Enable	Over Temperature Reverse Polarity	3.3 V	700 mA	1	TO-261-4 TO-261AA	0.7 V
Analog Devices LT1129CQ-3.3#PBF	Positive	64 dB	DDPAK-5	1.81 mOhm	Surface Mount	125 °C	0 °C	70 µA	30 V	Enable	Over Temperature Reverse Polarity	3.3 V	700 mA	1	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	0.7 V
Analog Devices LT1129IT-3.3#PBF	Positive	64 dB	TO-220-5	1.81 mOhm	Through Hole	125 °C	-40 °C	70 µA	30 V	Enable	Over Temperature Reverse Polarity	3.3 V	700 mA	1	TO-220-5	0.7 V
Analog Devices LT1129MPST-3.3	Positive	64 dB	SOT-223-3	1.81 mOhm	Surface Mount	125 °C	-55 °C	70 µA	30 V	Enable	Over Temperature Reverse Polarity	3.3 V	700 mA	1	TO-261-4 TO-261AA	0.7 V
Analog Devices LT1129CS8-5#TRPBF	Positive	64 dB	8-SO	1.81 mOhm	Surface Mount	125 °C	0 °C	70 µA	30 V	Enable	Over Temperature Reverse Polarity	5 V	700 mA	1	8-SOIC	0.7 V	3.9 mm	0.154 in
Analog Devices LT1129CT#PBF	Positive	64 dB	TO-220-5		Through Hole	125 °C	0 °C	70 µA	30 V	Enable	Over Temperature Reverse Polarity	3.8 V	700 mA	1	TO-220-5	0.7 V			Adjustable	30 V

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 10.79
		10	$ 7.54
		25	$ 6.70
		100	$ 5.76
		250	$ 5.30
		500	$ 5.03
		1000	$ 4.80
Newark	Each	1	$ 10.27
		10	$ 6.99
		25	$ 6.30
		50	$ 5.60
		100	$ 5.16
		250	$ 4.75

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