LM338T

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LM338T

+BOM

IC REG LINEAR POS ADJ 5A TO220-3

  • 제조업체텍사스 인스트루먼트(주)

  • 제조업체 부품 #LM338T

  • 데이터시트 LM338T DataSheet

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사양

속성 가치
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

개요

Description

The LM338T is a versatile, adjustable three-terminal voltage regulator capable of supplying in excess of 5 amps over a 1.2V to 32V output range. Manufactured by companies like Texas Instruments, it is designed to provide local regulation on digital and other circuits, offering high performance and reliability. Key features include thermal overload protection, short circuit protection, and safe area protection, ensuring durability and safety in various applications.
The LM338T is typically housed in a TO-220 package, making it suitable for applications needing a robust power supply. It features a dropout voltage of about 3 volts and can be used in a variety of applications, including adjustable power supplies, battery chargers, and constant current regulators.
Its ease of use, requiring only two external resistors to set the output voltage, and its ability to handle significant power dissipation make it a popular choice for both hobbyists and professionals in electronics. This regulator is ideal for those requiring a reliable yet straightforward solution for voltage regulation needs.

Equivalent

The LM338T is a high-current, adjustable voltage regulator. Equivalent products include the LT1083, LM350, and LM317 (with lower current capability). Additionally, the NTE960 is a direct replacement. Ensure that the electrical characteristics such as input/output voltage range and current capacity meet your specific application requirements when selecting alternatives.

Features

The LM338T is a versatile adjustable voltage regulator with several key features:
1. Adjustable Output Voltage: It provides an output voltage range from 1.2V to 32V.
2. Current Capability: It can deliver a continuous output current of up to 5A.
3. Thermal Overload Protection: The device includes thermal regulation to protect against overheating.
4. Short-Circuit Protection: It features current limiting to safeguard against short circuits.
5. Safe Operating Area Protection: Ensures safe operation even during overload conditions.
6. Low Dropout Voltage: Typically around 3V, allowing it to regulate even when the input voltage is close to the output.
7. Easy to Use: Requires only two external resistors to set the output voltage.
8. Versatile Application: Suitable for a wide range of applications including power supplies and battery chargers.
9. TO-220 Package: The LM338T is typically available in a TO-220 package, which provides efficient heat dissipation.
Overall, the LM338T is a reliable and robust component for power regulation needs.

Pinout

The LM338T is a three-terminal adjustable voltage regulator capable of supplying in excess of 5A over a 1.2V to 32V output range. It is housed in a TO-220 package. The pin count and functions are as follows:
1. Pin 1 (Adjust): This pin is used to adjust the output voltage. By connecting it to a voltage divider from the output to ground, you can set the desired output voltage.
2. Pin 2 (Output): This is the regulated output voltage pin. It is connected to the load. The output voltage is controlled by the voltage divider connected to the adjust pin.
3. Pin 3 (Input): This is the unregulated input voltage pin. The input voltage should be higher than the desired output voltage by at least 3V for proper regulation.
The LM338T is widely used in applications requiring high current and adjustable voltage, such as power supply designs and battery chargers.

Manufacturer

The LM338T is manufactured by Texas Instruments, among other companies. Texas Instruments (TI) is a global semiconductor company that designs and manufactures a wide range of electronic components, including integrated circuits (ICs) used in various applications like consumer electronics, automotive systems, industrial machinery, and more. TI is known for its innovation in the field of analog and embedded processing products, and they are a leader in the semiconductor industry, providing components essential for modern electronics.

Application

The LM338T is a versatile voltage regulator used in applications requiring a stable output voltage. It is commonly used in adjustable power supplies, battery chargers, and LED drivers due to its ability to deliver a wide range of output voltages and currents up to 5A. The regulator's robust thermal and overload protection makes it suitable for use in industrial equipment, telecommunications, and automotive systems. Additionally, it can be employed in DIY electronics projects and prototyping to provide a reliable power source. Its ease of use and flexibility make it a popular choice for both professional and hobbyist applications.

Package

The LM338T is a voltage regulator integrated circuit typically housed in a TO-220 package. This package type is characterized by its three leads and a metal tab for heat dissipation, making it suitable for through-hole mounting and applications requiring moderate power dissipation.

Frequently Asked Questions


Q: What is the maximum input voltage for the LM338T?
A: The maximum input voltage is 40V, as specified for this adjustable positive voltage regulator.


Q: Can the LM338T output a fixed voltage?
A: No, it provides an adjustable output from 1.24V to 32V, requiring external resistors to set the voltage.


Q: What is the maximum output current of the LM338T?
A: It can deliver up to 5A of output current, suitable for medium-power applications.


Q: What protection features does the LM338T include?
A: It includes over-temperature protection and short circuit protection for reliable operation.


Q: What is the operating temperature range for the LM338T?
A: It operates from 0°C to 125°C, making it suitable for commercial-grade environments.


Q: Is the LM338T available in a surface-mount package?
A: No, it comes in a TO-220-3 through-hole package, designed for heatsink mounting.


Q: What is the typical PSRR performance at 120Hz?
A: The PSRR is 75dB to 60dB at 120Hz, ensuring good ripple rejection in power supply designs.