Integrated Circuits (ICs)

LT1521CS8-3#TRPBF

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300MA LOW DROPOUT REGULATORS WITH MICROPOWER QUIESCENT CURRENT AND SHUTDOWN

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DocumentsLT1521/LT1521-3/LT1521-3.3/LT1521-5: 300mA Low Dropout Regulators with Micropower Quiescent Current and Shutdown Data Sheet (Rev.C)R321 Reliability Data +2

Integrated Circuits (ICs)

LT1521CS8-3#TRPBF

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Analog Devices

300MA LOW DROPOUT REGULATORS WITH MICROPOWER QUIESCENT CURRENT AND SHUTDOWN

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DocumentsLT1521/LT1521-3/LT1521-3.3/LT1521-5: 300mA Low Dropout Regulators with Micropower Quiescent Current and Shutdown Data Sheet (Rev.C)R321 Reliability Data +2

Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LT1521CS8-3#TRPBF

Control Features	Enable
Current - Output	300 mA
Current - Supply (Max) [Max]	12 mA
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	8-SOIC
Package / Case [x]	0.154 in
Package / Case [y]	3.9 mm
Protection Features	Over Temperature, Reverse Polarity, Over Current
PSRR	58 dB
Supplier Device Package	8-SO
Voltage - Input (Max) [Max]	20 V
Voltage Dropout (Max) [Max]	0.75 V

LT1521 Series

300mA Low Dropout Regulators with Micropower Quiescent Current and Shutdown

Part	Protection Features	Number of Regulators	Package / Case	Package / Case [y]	Package / Case [x]	Output Configuration	Mounting Type	Current - Supply (Max) [Max]	Operating Temperature [Max]	Operating Temperature [Min]	Output Type	Supplier Device Package	Voltage - Input (Max) [Max]	Voltage - Output (Min/Fixed)	Voltage Dropout (Max) [Max]	Control Features	Current - Output	PSRR	Output Type	Voltage - Output (Max) [Max]	Package / Case [custom]	Package / Case
Analog Devices LT1521IS8-5#PBF	Over Current Over Temperature Reverse Polarity	1	8-SOIC	3.9 mm	0.154 in	Positive	Surface Mount	12 mA	125 °C	-40 °C	1.81 mOhm	8-SO	20 V	5 V	0.75 V	Enable	300 mA	58 dB
Analog Devices LT1521CS8-3#PBF	Over Current Over Temperature Reverse Polarity	1	8-SOIC	3.9 mm	0.154 in	Positive	Surface Mount	12 mA	125 °C	0 °C	1.81 mOhm	8-SO	20 V		0.75 V	Enable	300 mA	58 dB
Analog Devices LT1521CS8-3#TRPBF	Over Current Over Temperature Reverse Polarity	1	8-SOIC	3.9 mm	0.154 in	Positive	Surface Mount	12 mA	125 °C	0 °C	1.81 mOhm	8-SO	20 V		0.75 V	Enable	300 mA	58 dB
Analog Devices LT1521IST-5#TRPBF	Over Current Over Temperature Reverse Polarity	1	TO-261-4 TO-261AA			Positive	Surface Mount	12 mA	125 °C	-40 °C	1.81 mOhm	SOT-223-3	20 V	5 V	0.75 V	Enable	300 mA	58 dB
Analog Devices LT1521CS8#PBF	Over Current Over Temperature Reverse Polarity	1	8-SOIC	3.9 mm	0.154 in	Positive	Surface Mount	12 mA	125 °C	0 °C		8-SO	20 V	3.8 V	0.75 V	Enable	300 mA	58 dB	Adjustable	20 V
Analog Devices LT1521CST-3#TRPBF	Over Current Over Temperature Reverse Polarity	1	TO-261-4 TO-261AA			Positive	Surface Mount	12 mA	125 °C	0 °C	1.81 mOhm	SOT-223-3	20 V		0.75 V	Enable	300 mA	58 dB
Analog Devices LT1521CS8-3.3#PBF	Over Current Over Temperature Reverse Polarity	1	8-SOIC	3.9 mm	0.154 in	Positive	Surface Mount	12 mA	125 °C	0 °C	1.81 mOhm	8-SO	20 V	3.3 V	0.75 V	Enable	300 mA	58 dB
Analog Devices LT1521CMS8-3#TRPBF	Over Current Over Temperature Reverse Polarity	1	8-MSOP 8-TSSOP			Positive	Surface Mount	12 mA	125 °C	0 °C	1.81 mOhm	8-MSOP	20 V		0.75 V	Enable	300 mA	58 dB			0.118 in	3 mm

Pricing

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

Distributor	Package	Quantity	$

Digikey	Tape & Reel (TR)	2500	$ 3.48

Description

General part information

LT1521 Series

The LT1521/LT1521-3/LT1521-3.3/LT1521-5 are low dropout regulators with micropower quiescent current and shutdown. These devices are capable of supplying 300mA of output current with a dropout voltage of 0.5V.Designed for use in battery-powered systems, the low quiescent current, 12μA operating and 6μA in shutdown, makes them an ideal choice. The quiescent current is well controlled; it does not rise in dropout as it does with many other low dropout PNP regulators.Other features of the LT1521/LT1521-3/LT1521-3.3/LT1521-5 include the ability to operate with very small output capacitors. They are stable with only 1.5μF on the output while most older devices require between 10μF and 100μF for stability. Small ceramic capacitors can be used, enhancing manufacturability. Also, the input may be connected to voltages lower than the output voltage, including negative voltages, without reverse current flow from output to input. This makes the LT1521 series ideal for backup power situations where the output is held high and the input is low or reversed. Under these conditions only 5μA will flow from the output pin to ground.APPLICATIONSLow Current RegulatorRegulator for Battery-Powered SystemsPost Regulator for Switching Supplies

Documents

Technical documentation and resources

LT1521CS8-3#TRPBF

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LT1521CS8-3#TRPBF

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Technical Specifications

LT1521 Series

Pricing

Description

LT1521 Series

Documents

LT1521/LT1521-3/LT1521-3.3/LT1521-5: 300mA Low Dropout Regulators with Micropower Quiescent Current and Shutdown Data Sheet (Rev.C)

R321 Reliability Data

Tape and Reel Packaging

Datasheet

LT1521 Series