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LM338K
IC REG LINEAR POS ADJ 5A TO3
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規格
| Part Status | Obsolete |
| Base Product Number | LM338 |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Number of Regulators | 1 |
| Voltage - Input (Max) | 35V |
| Voltage - Output (Min/Fixed) | 1.2V |
| Voltage - Output (Max) | 32V |
| Current - Output | 5A |
| PSRR | 75dB ~ 60dB (120Hz) |
| Protection Features | Over Current, Over Temperature |
| Operating Temperature | 0°C ~ 125°C |
| Mounting Type | Through Hole |
| Package | TO-204AA, TO-3 |
| Supplier Device Package | TO-3 |
| Packaging | Tube |
概述
Description
The LM338K is a versatile, adjustable three-terminal voltage regulator capable of supplying in excess of 5A over a 1.2V to 32V output range. Commonly used in power supply applications, the LM338K offers robust performance with features like overload protection, thermal regulation, and safe area protection, making it reliable under a wide variety of conditions. It can be used in fixed or adjustable voltage applications and supports both linear and switching designs.
The device is often housed in a TO-3 package, which provides efficient heat dissipation, essential for high-current applications. With its simple design—requiring only two external resistors to set the output voltage—the LM338K is user-friendly and adaptable for various custom voltage solutions. Its high output current capability and low dropout voltage make it suitable for battery chargers, constant current regulators, and other high-current circuits.
Moreover, the LM338K’s performance remains stable across varying loads and temperatures, ensuring consistent output. Its design simplicity and reliability make it a popular choice among engineers and hobbyists for power regulation tasks.
The device is often housed in a TO-3 package, which provides efficient heat dissipation, essential for high-current applications. With its simple design—requiring only two external resistors to set the output voltage—the LM338K is user-friendly and adaptable for various custom voltage solutions. Its high output current capability and low dropout voltage make it suitable for battery chargers, constant current regulators, and other high-current circuits.
Moreover, the LM338K’s performance remains stable across varying loads and temperatures, ensuring consistent output. Its design simplicity and reliability make it a popular choice among engineers and hobbyists for power regulation tasks.
Features
The LM338K is a versatile voltage regulator designed to provide adjustable output voltages ranging from 1.2V to 32V with a current output capability of up to 5A. Key features of the LM338K include:
1. Wide Input Voltage Range: It can operate with a broad input voltage, making it suitable for various applications.
2. Adjustable Output: The regulator allows for precision tuning of the output voltage using external resistors, providing customization for different needs.
3. High Current Capability: With a current output of 5A, it is ideal for medium to high-power applications.
4. Thermal Overload Protection: The device includes built-in protection against overheating, enhancing reliability and safety.
5. Short-Circuit Protection: It prevents damage from output short circuits, ensuring continuous operation.
6. Safe Area Protection: This feature prevents the device from operating outside its safe limits, protecting both the regulator and load.
7. Package Options: Available in a TO-3 metal can package, it is designed for reliable performance with efficient heat dissipation.
The LM338K is widely used in applications requiring adjustable power supplies, battery chargers, and constant current regulators due to its robust performance and protection features.
1. Wide Input Voltage Range: It can operate with a broad input voltage, making it suitable for various applications.
2. Adjustable Output: The regulator allows for precision tuning of the output voltage using external resistors, providing customization for different needs.
3. High Current Capability: With a current output of 5A, it is ideal for medium to high-power applications.
4. Thermal Overload Protection: The device includes built-in protection against overheating, enhancing reliability and safety.
5. Short-Circuit Protection: It prevents damage from output short circuits, ensuring continuous operation.
6. Safe Area Protection: This feature prevents the device from operating outside its safe limits, protecting both the regulator and load.
7. Package Options: Available in a TO-3 metal can package, it is designed for reliable performance with efficient heat dissipation.
The LM338K is widely used in applications requiring adjustable power supplies, battery chargers, and constant current regulators due to its robust performance and protection features.
Package
The LM338K is a voltage regulator with a TO-3 package type. The TO-3 package is a metal can design that provides excellent heat dissipation, making it suitable for high-power applications.
Pinout
The LM338K is a voltage regulator IC commonly used for adjustable voltage regulation applications. It typically comes in a TO-3 package with two main pins and a case that acts as a third connection. Here’s a concise breakdown of its pin count and functions:
1. Input (Pin 1): This is the input pin where the unregulated voltage is supplied. The IC regulates this voltage to provide a stable output.
2. Output (Pin 2): The output pin delivers the regulated voltage. The output voltage can be adjusted using external resistors connected between the output, adjust pin, and ground.
3. Case/Adjustment (Case Pin): The metal case often acts as a heat sink and is also used as the adjustment terminal. By connecting a resistor between this terminal and the output, you can set the desired output voltage.
The LM338K can supply a current of up to 5A and the output voltage can be adjusted from 1.2V to 32V. Its robust design makes it suitable for various power supply applications.
1. Input (Pin 1): This is the input pin where the unregulated voltage is supplied. The IC regulates this voltage to provide a stable output.
2. Output (Pin 2): The output pin delivers the regulated voltage. The output voltage can be adjusted using external resistors connected between the output, adjust pin, and ground.
3. Case/Adjustment (Case Pin): The metal case often acts as a heat sink and is also used as the adjustment terminal. By connecting a resistor between this terminal and the output, you can set the desired output voltage.
The LM338K can supply a current of up to 5A and the output voltage can be adjusted from 1.2V to 32V. Its robust design makes it suitable for various power supply applications.
Manufacturer
The LM338K is a voltage regulator commonly manufactured by companies like Texas Instruments and STMicroelectronics. Texas Instruments (TI) is an American technology company that designs and manufactures semiconductors and various integrated circuits, which are sold to electronics designers and manufacturers globally. TI is one of the top semiconductor companies worldwide, focusing on developing analog chips and embedded processors. STMicroelectronics is a European company that designs, develops, and manufactures a wide range of semiconductor products. It serves several industries, including automotive, industrial, personal electronics, and communications. Both TI and STMicroelectronics are major players in the semiconductor industry, emphasizing innovation and reliability in their product offerings.
Application
The LM338K is a versatile voltage regulator used in several applications, including power supply circuits, battery chargers, and adjustable voltage regulators. It supports outputs ranging from 1.2V to 32V and can deliver up to 5A of current, making it suitable for high-power applications. Its robust performance is ideal for use in telecommunications, lab instrumentation, and current regulator circuits. Additionally, the LM338K is employed in solar power systems and various DIY electronics projects for efficient voltage regulation.
Equivalent
Equivalent products to the LM338K voltage regulator include the LT1083 from Analog Devices, the LM338T, and the LM350 from Texas Instruments, as well as the NTE960 from NTE Electronics. Ensure compatibility in terms of voltage and current ratings when selecting substitutes. These regulators are designed for high current voltage regulation, similar to the LM338K. Always check the datasheet for each product to ensure it meets your specific project requirements.
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