LT1121HVCS8#PBF

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Analog Devices Inc./Maxim Integrated

MICROPOWER LOW DROPOUT REGULATORS WITH SHUTDOWN

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LT1121HVCS8#PBF

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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

LT1121 Series

The LT1121/LT1121-3.3/LT1121-5 are micropower low dropout regulators with shutdown. These devices are capable of supplying 150mA of output current with a dropout voltage of 0.4V. Designed for use in battery-powered systems, the low quiescent current, 30µA operating and 16µA 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 LT1121/LT1121-3.3/LT1121-5 include the ability to operate with very small output capacitors. They are stable with only 0.33µF on the output while most older devices require between 1µF and 100µF for stability. Small ceramic capacitors can be used, enhancing manufacturability. Also the input may be connected to ground or a reverse voltage without reverse current flow from output to input. This makes the LT1121 series 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.ApplicationsLow Current RegulatorRegulator for Battery-Powered SystemsPost Regulator for Switching Supplies

Technical Specifications

Parameters and characteristics for this part

Specification	LT1121HVCS8#PBF

Control Features	Enable
Current - Output	150 mA
Current - Quiescent (Iq)	50 µA
Current - Supply (Max)	14 mA
Mounting Type	Surface Mount
Number of Regulators	1
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	0 °C
Output Configuration	Positive
Output Type	Adjustable
Package Length	0.154 in
Package Name	8-SOIC, 8-SO
Package Width	3.9 mm
Protection Features	Reverse Polarity, Over Temperature
PSRR	58 dB
Voltage - Input (Max)	30 V p-p
Voltage - Output (Max)	30 V
Voltage - Output (Min/Fixed)	3.75 V
Voltage Dropout (Max)	0.7 V

LT1121 Series

Part	Current - Output	Current - Quiescent (Iq)	Voltage - Output (Min/Fixed)	Protection Features	Operating Temperature (Max)	Operating Temperature (Min)	Output Type	Package Length	Package Name	Package Width	Control Features	Voltage - Input (Max)	Number of Regulators	Mounting Type	Current - Supply (Max)	PSRR	Output Configuration	Voltage Dropout (Max)	Package / Case	Voltage - Output (Max)
Analog Devices Inc./Maxim Integrated LT1121AIS8-5#TRPBF	150 mA	50 µA	5 V	Over Temperature Reverse Polarity	125 °C	-40 °C	Fixed	0.154 in	8-SO 8-SOIC	3.9 mm	Enable	30 V p-p	1	Surface Mount	14 mA	58 dB	Positive	0.7 V
Analog Devices Inc./Maxim Integrated LT1121CST-3.3#PBF	150 mA	50 µA	3.3 V	Over Temperature Reverse Polarity	125 °C	0 °C	Fixed		SOT-223-3		Enable	30 V p-p	1	Surface Mount	14 mA	58 dB	Positive	0.7 V	TO-261-4 TO-261AA
Analog Devices Inc./Maxim Integrated LT1121IZ-3.3#TRPBF	150 mA	50 µA	3.3 V	Over Temperature Reverse Polarity	125 °C	-40 °C	Fixed		TO-92-3		Enable	30 V p-p	1	Through Hole	14 mA	58 dB	Positive	0.7 V	TO-226-3 TO-92-3 (TO-226AA) Formed Leads
Analog Devices Inc./Maxim Integrated LT1121IZ-3.3#PBF	150 mA	50 µA	3.3 V	Over Temperature Reverse Polarity	125 °C	-40 °C	Fixed		TO-92-3		Enable	30 V p-p	1	Through Hole	14 mA	58 dB	Positive	0.7 V	TO-226-3 TO-92-3 (TO-226AA)
Analog Devices Inc./Maxim Integrated LT1121HVIS8#PBF	150 mA	50 µA	3.75 V	Over Temperature Reverse Polarity	125 °C	-40 °C	Adjustable	0.154 in	8-SO 8-SOIC	3.9 mm	Enable	30 V p-p	1	Surface Mount	14 mA	58 dB	Positive	0.7 V		30 V
Analog Devices Inc./Maxim Integrated LT1121CST-5#PBF	150 mA	50 µA	5 V	Over Temperature Reverse Polarity	125 °C	0 °C	Fixed		SOT-223-3			30 V p-p	1	Surface Mount	14 mA	58 dB	Positive	0.7 V	TO-261-4 TO-261AA
Analog Devices Inc./Maxim Integrated LT1121IN8-5#PBF	150 mA	50 µA	5 V	Over Temperature Reverse Polarity	125 °C	-40 °C	Fixed	0.3 in	8-DIP 8-PDIP	7.62 mm	Enable	30 V p-p	1	Through Hole	14 mA	58 dB	Positive	0.7 V
Analog Devices Inc./Maxim Integrated LT1121ACS8#PBF	150 mA	50 µA	3.75 V	Over Temperature Reverse Polarity	125 °C	0 °C	Adjustable	0.154 in	8-SO 8-SOIC	3.9 mm	Enable	30 V p-p	1	Surface Mount	14 mA	58 dB	Positive	0.7 V		30 V
Analog Devices Inc./Maxim Integrated LT1121IZ-5#TRPBF	150 mA	50 µA	5 V	Over Temperature Reverse Polarity	125 °C	-40 °C	Fixed		TO-92-3		Enable	30 V p-p	1	Through Hole	14 mA	58 dB	Positive	0.7 V	TO-226-3 TO-92-3 (TO-226AA) Formed Leads
Analog Devices Inc./Maxim Integrated LT1121CS8-5#PBF	150 mA	50 µA	5 V	Over Temperature Reverse Polarity	125 °C	0 °C	Fixed	0.154 in	8-SO 8-SOIC	3.9 mm	Enable	30 V p-p	1	Surface Mount	14 mA	58 dB	Positive	0.7 V

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

R086 Reliability Data

LT1121HVCS8#PBF | Datasheet