LM337LM

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LM337LM

+BOM

IC REG LIN NEG ADJ 100MA 8SOIC

  • ManufacturerTexas Instruments

  • Mfr. Part #LM337LM

  • Package SOIC (D)-8

  • In Stock2615

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Specifications

Attribute Value
Package Bulk
ProductStatus Not For New Designs
OutputConfiguration Negative
OutputType Adjustable
NumberofRegulators 1
Voltage-Input(Max) -40V
Voltage-Output(Min/Fixed) -1.2V
Voltage-Output(Max) -37V
Current-Output 100mA
PSRR 60dB (120Hz)
ProtectionFeatures Over Temperature, Short Circuit
OperatingTemperature -25°C ~ 125°C
MountingType Surface Mount
Package/Case 8-SOIC (0.154, 3.90mm Width)

Overview

Description

The LM337LM is a versatile adjustable negative voltage regulator, typically used in applications requiring a stable and adjustable output voltage. It is part of the LM337 family, designed to provide an output voltage range from -1.2V to -37V with a maximum output current of 500 mA. The device is often utilized in power supply circuits where a negative voltage is required, such as in operational amplifier configurations or other analog circuit applications.
Key features of the LM337LM include thermal overload protection, short-circuit protection, and safe area compensation, which enhance its reliability and robustness. The regulator requires only two external resistors to set the output voltage, making it easy to implement in various circuit designs. Its relatively simple design and broad input voltage range make it suitable for numerous applications.
The LM337LM is typically available in a TO-220 or SOP-8 package, offering flexibility in terms of mounting and design configurations. Its ease of use, combined with its stability and protection features, make it a popular choice for negative voltage regulation needs.

Equivalent

The LM337LM chip is a negative adjustable voltage regulator. Equivalent products include the LM337 by various manufacturers (like Texas Instruments, ON Semiconductor, and STMicroelectronics), the L7915 series, and the MIC29152 (for certain applications). These regulators can typically handle similar voltage and current specifications, but always verify the datasheet for exact electrical characteristics and pin configurations to ensure compatibility with your specific application.

Features

The LM337 is a versatile three-terminal adjustable negative voltage regulator. It is designed to supply a variable negative output voltage, making it useful for a wide array of applications. Here are some key features:
1. Adjustable Output Voltage: The LM337 can provide an output voltage range from -1.25V to -37V by using a resistor divider network.
2. Output Current: It can deliver a maximum output current of 1.5A, allowing it to power moderate loads.
3. Thermal Overload Protection: This feature protects the device from overheating by shutting it down if the temperature exceeds a safe limit.
4. Short-Circuit Protection: It includes robust protection against short-circuit conditions to prevent damage to the regulator and the circuit.
5. Safe Operating Area (SOA) Protection: Ensures reliable operation by keeping the device within safe limits under various operating conditions.
6. Low Dropout Voltage: The regulator operates with a low dropout voltage, enhancing efficiency.
Overall, the LM337 is a reliable component for applications requiring adjustable negative voltage regulation.

Pinout

The LM337LM is a three-terminal adjustable negative voltage regulator. It typically comes in a TO-220, TO-92, or SOIC-8 package, depending on the specific variant. Here's a concise description of its pin count and function for the TO-220 package, which is one of the most common:
1. Pin Count: 3 pins.
2. Pin Functions:
- Pin 1 (Adjust): Used to adjust the output voltage. The output voltage is set by connecting this pin through a resistor divider network to the output pin.
- Pin 2 (Output): Provides the regulated negative output voltage, which can be adjusted to a range typically from -1.2V to -37V.
- Pin 3 (Input): Connects to the unregulated input voltage. The input voltage must be more negative than the desired output voltage by a certain dropout margin to ensure proper regulation.
The device is primarily used for applications requiring a stable and adjustable negative voltage, such as power supplies or operational amplifier circuits.

Manufacturer

The LM337LM is manufactured by Texas Instruments. Texas Instruments (TI) is an American technology company that designs and manufactures semiconductors and various integrated circuits, which are commonly used in electronics. It is one of the largest and most prominent semiconductor companies in the world, known for its innovation in the field of analog technology, embedded processing, and digital light processing. TI serves a wide range of industries, including automotive, industrial, personal electronics, communications equipment, and enterprise systems. The company is headquartered in Dallas, Texas, and has operations worldwide.

Application

The LM337LM is a versatile adjustable negative voltage regulator commonly used in various applications. It is suitable for power supply designs where a stable and adjustable negative voltage is required. Typical application areas include:
1. Variable Power Supplies: Used for creating adjustable negative voltage outputs.
2. Battery Chargers: Provides regulated charging voltage, ensuring battery longevity.
3. Operational Amplifier Circuits: Supplies negative voltage rails for dual-supply op-amp circuits.
4. Test Equipment: Offers precision voltage control for testing and measurement devices.
5. Communication Devices: Ensures stable power supply for analog and RF circuits.
Overall, the LM337LM is utilized in circuits requiring reliable negative voltage regulation with a wide range of output adjustability.

Package

The LM337LM is typically available in a TO-220 or TO-92 package. These are common package types for voltage regulators, with TO-220 being a larger, through-hole package suitable for heat dissipation, while TO-92 is a smaller, through-hole package for lower power applications.