LM317S

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LM317S

IC REG LINEAR ADJ POS STNDRD REG

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概述

Description

The LM317S is a versatile, adjustable three-terminal voltage regulator designed to supply a variable DC output voltage. It can provide an output voltage ranging from 1.25V to 37V, with an output current of up to 1.5A, making it suitable for various applications like power supplies, battery chargers, and adjustable power sources.
Key features of the LM317S include thermal overload protection, current limiting, and safe area protection, ensuring reliable operation even under challenging conditions. The device requires only two external resistors to set the desired output voltage, simplifying circuit design. Its robust design allows for a dropout voltage as low as 3V, enhancing its efficiency.
The LM317S is available in various package types, most commonly the TO-220, which aids in heat dissipation. Its ease of use, reliability, and flexibility make it a popular choice among hobbyists and professionals for creating custom voltage outputs in electronic circuits.

Features

The LM317S is a three-terminal adjustable voltage regulator known for its versatility and ease of use. Key features include:
1. Output Voltage Range: It can adjust from 1.25V to 37V with a simple resistor divider, making it suitable for various applications.
2. Output Current: Capable of providing more than 1.5A of load current, suitable for medium power applications.
3. Line and Load Regulation: Offers good line regulation (typically 0.01%/V) and load regulation (typically 0.1%) for stable performance.
4. Thermal Overload Protection: Incorporates thermal overload protection to prevent damage from overheating.
5. Short Circuit Protection: Features current limiting and safe area protection.
6. Input-Output Differential Voltage: Operates with a minimum differential voltage of 3V between input and output.
7. Temperature Range: Typically operates in a wide temperature range, suitable for various environments.
8. Package Type: Available in TO-220 and similar packages, allowing for easy mounting and heat dissipation.
These features make the LM317S an ideal choice for power supply applications where adjustable, reliable voltage regulation is required.

Package

The LM317S is typically available in a TO-220 package, which is a standard type for power semiconductors. It is a three-terminal adjustable voltage regulator used for a variety of applications.

Pinout

The LM317S is a three-terminal adjustable voltage regulator with a TO-263 package. It is commonly used for voltage regulation applications, offering an output voltage range of 1.25V to 37V with an input-output differential of 3V to 40V. The pin count and functions are as follows:
1. Input (Pin 1): This pin receives the unregulated input voltage which the LM317S regulates to the desired output level.
2. Output (Pin 2): This pin provides the regulated output voltage. The output voltage is set using two external resistors.
3. Adjust (Pin 3): This pin is used to adjust the output voltage. By varying the resistor network connected to this pin, you can set the desired output voltage.
These pins are used in conjunction with external components to stabilize and configure the voltage regulation process. The LM317S is widely used in power supply applications due to its versatility and ease of use.

Manufacturer

The LM317S is manufactured by multiple companies, including Texas Instruments and STMicroelectronics. These companies are prominent players in the semiconductor industry.
Texas Instruments, headquartered in Dallas, Texas, is a global technology company known for designing and manufacturing semiconductors and integrated circuits for various applications. They produce components used in electronics, industrial, automotive, and communication sectors, among others.
STMicroelectronics, based in Geneva, Switzerland, is another leading semiconductor company that designs and builds electronic components for a wide range of industries. STMicroelectronics focuses on innovative solutions and technologies for various applications, including industrial, automotive, personal electronics, and communications equipment.
Both companies are well-established in the semiconductor sector and are known for producing reliable and high-quality electronic components, including voltage regulators like the LM317S.

Application

The LM317S is a versatile adjustable voltage regulator used in various applications. It is commonly employed in power supply circuits to provide a stable output voltage, which can be adjusted over a range of 1.25V to 37V. It is used in battery chargers, reduced voltage power supplies, and adjustable power supplies. Additionally, it can be found in power management circuits for consumer electronics, telecommunications equipment, and industrial automation systems. Its ability to handle moderate power outputs makes it suitable for DIY electronics projects and prototyping.

Equivalent

Equivalent products to the LM317S voltage regulator include the L78S series (such as L78S05 and L78S12), LM1084, LM1117, and LT1083. These regulators provide similar adjustable output voltage features and current capabilities. Ensure that the specifications such as output current, voltage range, and package type meet your requirements when selecting an equivalent. Always consult the datasheets for compatibility.

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