1 3

LM338 - Adjustable Voltage Regulator - TO-220 IC

SKU: NJISZQ89A7
The LM338 is a high-current adjustable positive voltage regulator IC capable of delivering up to 5A output current over a wide adjustable output voltage range. Designed for versatility and reliability, the LM338 allows users to set the desired output voltage using only two external resistors, making it suitable for a broad range of power supply applications. The regulator incorporates internal...
Rs. 80.00
Rs. 99.00 Rs. 80.00
Save Rs. 19
Sold out
Tax included. Shipping calculated at checkout.
Guaranteed safe & secure checkout

Shipping & Returns

Orders placed before 3 PM IST will be shipped on the same day (excluding Sundays and Public holidays) through our shipping partners. In rare cases, the pickup may get delayed during Public holidays / Bandh / Environmental disturbances.

Specifications

Specifications:

Module Type: Adjustable Positive Voltage Regulator IC
IC Model: LM338
Package Type: TO-220
Number of Pins: 3
Output Voltage Range: 1.25V to 32V Adjustable
Maximum Output Current: 5A
Input Voltage Range: Up to 40V DC
Reference Voltage: 1.25V Typical
Dropout Voltage: Approximately 2V – 3V
Load Regulation: Typically 0.1%
Line Regulation: Typically 0.005%/V
Ripple Rejection: Up to 80dB
Adjustment Pin Current: Typically 50µA
Protection Features: Thermal Shutdown, Current Limiting, SOA Protection
Operating Temperature Range: 0°C to +125°C
Storage Temperature Range: -65°C to +150°C
Mounting Type: Through-Hole

Additional Resources

LM338.PDF

FAQ

1. What is the LM338 Adjustable Voltage Regulator used for?

The LM338 is used to create adjustable voltage power supplies, battery chargers, laboratory power systems, motor control circuits, and other applications requiring regulated high-current output.

2. What output voltage range does the LM338 support?

The LM338 provides an adjustable output voltage ranging from 1.25V to 32V, depending on the external resistor configuration.

3. How much current can the LM338 deliver?

The LM338 can supply up to 5A of output current, making it suitable for high-power electronic applications.

4. Does the LM338 require external components for voltage adjustment?

Yes, the output voltage is set using two external resistors connected to the adjustment pin, allowing precise voltage control.

5. Does the LM338 include built-in protection features?

Yes, the LM338 includes thermal overload protection, short-circuit current limiting, and safe operating area protection to ensure reliable and safe operation.

View full product details

The LM338 is a high-current adjustable positive voltage regulator IC capable of delivering up to 5A output current over a wide adjustable output voltage range. Designed for versatility and reliability, the LM338 allows users to set the desired output voltage using only two external resistors, making it suitable for a broad range of power supply applications.

The regulator incorporates internal current limiting, thermal overload protection, and safe operating area protection, ensuring safe operation under varying load conditions. With excellent line and load regulation characteristics, the LM338 is widely used in adjustable power supplies, battery chargers, industrial equipment, motor control circuits, and laboratory power systems.

Packaged in a TO-220 form factor, the LM338 offers a compact solution for high-current voltage regulation while maintaining ease of installation and effective heat dissipation when used with a suitable heatsink.

Key Features

  • Adjustable output voltage from 1.25V to 32V
  • High output current capability up to 5A
  • Requires only two external resistors for voltage adjustment
  • Built-in thermal overload protection
  • Internal short-circuit current limiting
  • Safe Operating Area (SOA) protection
  • Excellent line and load regulation
  • Low output voltage ripple
  • Wide input voltage operating range
  • Suitable for constant voltage and constant current applications
  • TO-220 package for compact installation
  • High reliability and long operational life