LD2981ABU33TR

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STMicroelectronics

ULTRA LOW DROP VOLTAGE REGULATORS WITH INHIBIT LOW ESR OUTPUT

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LD2981ABU33TR

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STMicroelectronics

ULTRA LOW DROP VOLTAGE REGULATORS WITH INHIBIT LOW ESR OUTPUT

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Description Specifications Series Pricing CAD Documents

Description

General part information

LD2981 Series

The LD2981 is a 100 mA fixed-output voltage regulator. The low-drop voltage and the ultra low quiescent current make them suitable for low noise, low power applications and in battery powered systems.

The quiescent current in sleep mode is less than 1 μA when INHIBIT pin is pulled low. Shutdown logic control function is available on pin n° 3 (TTL compatible). This means that when the device is used as local regulator, it is possible to put a part of the board in standby, decreasing the total power consumption. The LD2981 is designed to work with low ESR ceramic capacitor. Typical applications are in cellular phone, palmtop/laptop computer, personal digital assistant (PDA), personal stereo, camcorder and camera.

Technical Specifications

Parameters and characteristics for this part

Specification	LD2981ABU33TR

Current - Output	100 mA
Current - Quiescent (Iq)	150 µA
Current - Supply (Max)	2.6 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 / Case	TO-243AA
Package Name	SOT-89-3
Protection Features	Over Current, Over Temperature
PSRR	63 dB
Voltage - Input (Max)	16 V
Voltage - Output (Min/Fixed)	3.3 V
Voltage Dropout (Max)	0.375 V

LD2981 Series

Ultra low drop voltage regulators with inhibit low ESR output

Part	Protection Features	Operating Temperature (Max)	Operating Temperature (Min)	Current - Quiescent (Iq)	Package Name	Current - Supply (Max)	Package / Case	PSRR	Number of Regulators	Voltage Dropout (Max)	Mounting Type	Current - Output	Voltage - Output (Min/Fixed)	Output Type	Voltage - Input (Max)	Output Configuration	Control Features
STMicroelectronics LD2981CU33TR	Over Current Over Temperature	125 °C	-40 °C	150 µA	SOT-89-3	2.6 mA	TO-243AA	63 dB	1	0.375 V	Surface Mount	100 mA	3.3 V	Fixed	16 V	Positive
STMicroelectronics LD2981ABU50TR	Over Current Over Temperature	125 °C	-40 °C	150 µA	SOT-89-3	2.6 mA	TO-243AA	63 dB	1	0.375 V	Surface Mount	100 mA	5 V	Fixed	16 V	Positive
STMicroelectronics LD2981CM33TR	Over Current Over Temperature	125 °C	-40 °C	150 µA	SOT-23-5	2.6 mA		63 dB	1	0.375 V	Surface Mount	100 mA	3.3 V	Fixed	16 V	Positive	Enable
STMicroelectronics LD2981ABM33TR	Over Current Over Temperature	125 °C	-40 °C	150 µA	SOT-23-5	2.6 mA		63 dB	1	0.375 V	Surface Mount	100 mA	3.3 V	Fixed	16 V	Positive	Enable
STMicroelectronics LD2981CM50TR	Over Current Over Temperature	125 °C	-40 °C	150 µA	SOT-23-5	2.6 mA		63 dB	1	0.375 V	Surface Mount	100 mA	5 V	Fixed	16 V	Positive	Enable
STMicroelectronics LD2981ABM38TR	Over Current Over Temperature	125 °C	-40 °C	150 µA	SOT-23-5	2.6 mA		63 dB	1	0.375 V	Surface Mount	100 mA	3.8 V	Fixed	16 V	Positive	Enable
STMicroelectronics LD2981CU50TR	Over Current Over Temperature	125 °C	-40 °C	150 µA	SOT-89-3	2.6 mA	TO-243AA	63 dB	1	0.375 V	Surface Mount	100 mA	5 V	Fixed	16 V	Positive
STMicroelectronics LD2981ABM50TR	Over Current Over Temperature	125 °C	-40 °C	150 µA	SOT-23-5	2.6 mA		63 dB	1	0.375 V	Surface Mount	100 mA	5 V	Fixed	16 V	Positive	Enable
STMicroelectronics LD2981CU18TR	Over Current Over Temperature	125 °C	-40 °C	150 µA	SOT-89-3	2.6 mA	TO-243AA	63 dB	1	0.375 V	Surface Mount	100 mA	1.8 V	Fixed	16 V	Positive
STMicroelectronics LD2981ABU33TR	Over Current Over Temperature	125 °C	-40 °C	150 µA	SOT-89-3	2.6 mA	TO-243AA	63 dB	1	0.375 V	Surface Mount	100 mA	3.3 V	Fixed	16 V	Positive