LM2941S

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LM2941S

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Specifications

Attribute Value
Package / Case Tube
Part Status Not For New Designs
Output Configuration Positive
Output Type Adjustable
Number of Regulators 1
Voltage - Input (Max) 26V
Voltage - Output (Min/Fixed) 5V
Voltage - Output (Max) 20V
Voltage Dropout (Max) 1V @ 1A
Current - Output 1A
Current - Quiescent (Iq) 10 mA
Current - Supply (Max) 15 mA
Control Features Enable
Protection Features Over Temperature, Reverse Polarity, Short Circuit
Operating Temperature -40°C ~ 125°C
Mounting Type Surface Mount

Overview

Description

The LM2941S is a low-dropout voltage regulator designed for use in applications where space is limited and power efficiency is crucial. This integrated circuit is capable of delivering up to 1 Amp of output current with an adjustable output voltage, typically ranging from 5V to 20V. It features a dropout voltage of only 0.5V at full load, making it suitable for battery-powered devices and systems requiring low power losses.
Key features of the LM2941S include short-circuit current limiting, thermal shutdown protection, and a low standby current, which enhance its reliability and efficiency. The device also offers a wide input voltage range, typically from 6V to 26V, which provides flexibility in various design applications. It is commonly used in automotive, industrial, and consumer electronics to maintain stable and regulated power supply lines.
The LM2941S comes in a TO-263 surface-mount package, which aids in heat dissipation and compact circuit design. Overall, it is a versatile and robust solution for maintaining voltage regulation in constrained environments.

Equivalent

The LM2941S is a low-dropout voltage regulator. Equivalent chips include:
1. LM2940S: Another low-dropout regulator with similar features.
2. MIC29302: A high-current, low-dropout regulator.
3. LT1085: An adjustable regulator with low dropout.
4. LD1085: A low dropout positive voltage regulator.
5. MC33269: Offers low dropout and similar current output.
Ensure compatibility with your specific requirements such as current, dropout voltage, and package type when selecting an equivalent.

Features

The LM2941S is a versatile low-dropout voltage regulator designed for a wide range of applications. Key features include:
1. Low Dropout Voltage: Typically around 0.5V at 1A, enabling efficient operation even with minimal input-output voltage differentials.
2. Output Current: Capable of providing up to 1A of output current, suitable for moderate power applications.
3. Adjustable Output: The output voltage can be adjusted from 5V to 20V using external resistors.
4. Protection Features: Includes current limiting, thermal shutdown, and safe area protection to enhance reliability under various conditions.
5. Low Quiescent Current: Exhibits low standby current, which is beneficial for battery-powered applications.
6. Versatile Packaging: Available in the TO-220 and TO-263 packages, offering flexibility for different thermal and mechanical design requirements.
7. Ripple Rejection: Good performance in attenuating input voltage ripple to ensure a stable output.
These features make the LM2941S ideal for applications such as power supplies, automotive electronics, and other circuits requiring efficient voltage regulation.

Pinout

The LM2941S is a low-dropout (LDO) voltage regulator with a specific pin configuration. It typically comes in a 5-pin TO-263 or TO-220 package. Here’s a brief description of its pin functions:
1. Input (Pin 1): Connects to the unregulated input voltage source.
2. Output (Pin 2): Provides the regulated output voltage.
3. Adjust (Pin 3): Used to set the output voltage when an adjustable version is used; typically connected to a resistor divider network.
4. Ground (Pin 4): The common ground for both the input and output.
5. Shutdown (Pin 5): Allows the regulator to be turned off by applying a high logic level, reducing the device's power consumption.
The LM2941S is designed for applications requiring high current and low dropout voltage, making it suitable for various electronics needing a stable power supply.

Manufacturer

The LM2941S is manufactured by Texas Instruments (TI). Texas Instruments is a renowned American technology company that designs and manufactures semiconductors and various integrated circuits. It is one of the top semiconductor companies globally and serves diverse markets, including automotive, industrial, personal electronics, communications, and enterprise systems. TI is well-known for its analog and embedded processing products, making it a key player in the electronics industry.

Application

The LM2941S is a low-dropout voltage regulator commonly used in automotive and industrial applications. It's ideal for systems requiring stable voltage regulation with minimal power dissipation, such as microcontroller power supplies, battery-operated devices, and portable electronics. Its ability to handle input voltages up to 26V and deliver output currents up to 1A makes it suitable for use in automotive circuits for powering sensors, control modules, and entertainment systems. Additionally, its low-dropout performance is advantageous for efficiently stepping-down higher voltages to usable levels in regulated power supplies, ensuring consistent performance across varying input conditions.

Package

The LM2941S is a low-dropout voltage regulator typically available in a TO-220 package. This package type is characterized by its three-terminal design and efficient heat dissipation, making it suitable for applications requiring reliable voltage regulation with moderate power handling capabilities.

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