LM338T

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LM338T

IC REG LINEAR POS ADJ 5A TO220-3

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Specifications

Part Status Obsolete
Base Product Number LM338
Output Configuration Positive
Output Type Adjustable
Number of Regulators 1
Voltage - Input (Max) 40V
Voltage - Output (Min/Fixed) 1.24V
Voltage - Output (Max) 32V
Current - Output 5A
PSRR 75dB ~ 60dB (120Hz)
Protection Features Over Temperature, Short Circuit
Operating Temperature 0°C ~ 125°C
Mounting Type Through Hole
Package TO-220-3
Supplier Device Package TO-220-3
Packaging Tube

Overview

Description

The LM338T is a versatile three-terminal adjustable voltage regulator designed for a wide range of applications. It can supply up to 5 amps of load current and outputs a regulated voltage from 1.2V to 32V, adjustable via external resistors. The device is known for its robust performance, offering features like thermal regulation, safe area protection, and current limiting to prevent damage under stress conditions.
Key specifications include a dropout voltage of 3V at full load current, ensuring efficient operation across its entire voltage range. The LM338T is preferred for its ease of use, requiring only a couple of external components (typically a pair of resistors for setting the output voltage) to function effectively.
Built for durability, it handles thermal overload and maintains stability with capacitive loads. Its TO-220 package allows for effective heat dissipation, essential for high-current applications. Common uses include power supplies, battery chargers, and adjustable power sources. The LM338T's reliability and flexibility make it a popular choice in both hobbyist and professional electronic circuits.

Features

The LM338T is a versatile voltage regulator that offers several key features:
1. Adjustable Output Voltage: It provides an adjustable output voltage ranging from 1.2V to 32V, allowing for flexibility in various applications.
2. High Output Current: The LM338T can deliver up to 5A of output current, making it suitable for high-power applications.
3. Thermal Overload Protection: It includes built-in thermal overload protection, which helps prevent damage by shutting down the regulator in case of excessive temperature.
4. Short-Circuit Protection: The device offers short-circuit protection to safeguard against potential damage from overcurrent conditions.
5. Safe Operating Area Protection: It ensures safe operations over a wide range of load conditions.
6. Low Dropout Voltage: This regulator has a low dropout voltage, typically around 3 volts, enhancing efficiency.
7. Robust Design: The LM338T is designed for durability and reliability in various environments.
8. Standard TO-220 Package: It comes in a standard TO-220 package, facilitating easy mounting and heat dissipation with a heatsink.
These features make the LM338T an ideal choice for power supply designs in industrial, consumer, and other electronic applications.

Package

The LM338T is a voltage regulator IC that typically comes in a TO-220 package. This package type is characterized by its three-pin configuration and metal tab for heat dissipation, making it suitable for a variety of power regulation applications.

Pinout

The LM338T is a voltage regulator with a TO-220 package and has three pins. The pin functions are as follows:
1. Input (Pin 1): This pin receives the unregulated input voltage that the device will regulate to a desired output voltage. It should be connected to a DC voltage supply within the specified input voltage range.
2. Output (Pin 2): This pin provides the regulated output voltage. The LM338T can deliver an output current of up to 5 amperes with an adjustable output voltage range from 1.2V to 32V.
3. Adjust (Pin 3): This is the adjustment pin used to set the output voltage. By connecting a resistor network (typically a variable resistor or a fixed resistor and a variable resistor) between this pin and the output pin, you can adjust the output voltage.
The LM338T is widely used in applications requiring reliable and precise voltage regulation, providing thermal overload protection and short-circuit protection for robust operation.

Manufacturer

The LM338T is a voltage regulator integrated circuit manufactured by several companies, primarily Texas Instruments (TI). Texas Instruments is a well-established technology company based in the United States that designs and manufactures semiconductors and various integrated circuits, including analog chips and embedded processors. The company serves a wide range of markets, including industrial, automotive, personal electronics, communications, and enterprise systems. TI is known for its innovation and extensive product portfolio, which supports the development and optimization of electronic devices worldwide.

Application

The LM338T is a versatile voltage regulator used in various applications, including power supply design, battery chargers, and adjustable power sources. It is suitable for applications requiring a constant and adjustable output voltage, such as in laboratory power supplies, LED drivers, and solar power systems. Its robust design allows it to handle high currents, making it ideal for use in power amplifiers and other high-power circuits. The LM338T is also used in automotive electronics for regulating voltage in car audio systems and other in-vehicle electronics.

Equivalent

The LM338T is a voltage regulator capable of providing a 5-amp output current. Equivalent or similar products include the LM338K, LM338P, and LM317 (with a lower current rating). Other equivalents from different manufacturers might be the L338 from STMicroelectronics and the UA7805CK from Texas Instruments, but ensure they match the required specifications such as current and voltage ratings for your application. Always check the datasheets to confirm compatibility.

Shipping

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Shipping Fee Reference (DHL/FedEx):

DHL: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 2-5 business days.

FedEx: Shipping cost ranges from $25-$40 (0.5kg), with an estimated delivery time of 3-7 business days.

UPS: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 3-7 business days.

TNT: Shipping cost ranges from $25-$65 (0.5kg), with an estimated delivery time of 3-7 business days.

EMS: Shipping cost ranges from $30-$50 (0.5kg), with an estimated delivery time of 7-15 business days.

Registered Air Mail: Shipping cost is $2-$4 (0.1kg), with an estimated delivery time of 5-20 business days.

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