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LM7818 Regulator IC - 18V Fixed Linear Regulator - TO-220 IC

SKU: TEGQRK5J0L
The LM7818 is a fixed positive voltage regulator IC designed to provide a stable and regulated 18V DC output from a higher DC input voltage source. Part of the widely used 78xx series of linear regulators, the LM7818 offers reliable voltage regulation with minimal external components, making it ideal for a wide range of electronic and power supply applications. The...
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Specifications

Specifications:

Module Type: Fixed Positive Linear Voltage Regulator IC
IC Model: LM7818 / 7818
Output Voltage: +18V DC Fixed
Package Type: TO-220
Number of Pins: 3
Output Current: Up to 1A (typical)
Input Voltage Range: 21V – 35V DC
Minimum Input Voltage: Approximately 20V DC
Dropout Voltage: Approximately 2V
Quiescent Current: Typically 5mA
Line Regulation: Typically 0.01%/V
Load Regulation: Typically 0.3%
Ripple Rejection: Up to 60–70dB
Protection Features: Thermal Shutdown, Short-Circuit Protection, SOA Protection
Mounting Type: Through-Hole
Operating Temperature: 0°C to +125°C
Storage Temperature: -65°C to +150°C

Additional Resources

LM7818.PDF

FAQ

1. What is the LM7818 Regulator IC used for?

The LM7818 is used to provide a stable and regulated 18V DC output voltage for electronic circuits, power supplies, industrial equipment, and embedded systems.

2. What output voltage does the LM7818 provide?

The LM7818 delivers a fixed and regulated output voltage of +18V DC.

3. Does the LM7818 include built-in protection features?

Yes, the LM7818 includes thermal overload protection, short-circuit current limiting, and safe operating area protection for reliable operation.

4. What input voltage is required for the LM7818 to operate correctly?

The regulator typically requires an input voltage of at least 20V DC, with a recommended operating range of 21V to 35V DC.

5. Can the LM7818 supply high current loads?

The LM7818 can provide up to 1A output current under normal conditions, and with proper heat sinking, it can support higher load requirements depending on the application.

View full product details

The LM7818 is a fixed positive voltage regulator IC designed to provide a stable and regulated 18V DC output from a higher DC input voltage source. Part of the widely used 78xx series of linear regulators, the LM7818 offers reliable voltage regulation with minimal external components, making it ideal for a wide range of electronic and power supply applications.

The device incorporates built-in protection features including thermal overload protection, short-circuit current limiting, and safe operating area protection, ensuring dependable operation even under challenging conditions. Housed in a TO-220 package, the LM7818 can deliver output currents up to 1A or more with proper heat sinking.

Its simplicity, reliability, and robust performance make it a popular choice for industrial equipment, audio amplifiers, communication systems, instrumentation, and DIY electronics projects requiring a regulated 18V power supply.

Key Features

  • Fixed +18V regulated output voltage
  • Based on the industry-standard 78xx regulator series
  • Output current capability up to 1A (higher with adequate heatsink)
  • Built-in thermal overload protection
  • Internal short-circuit current limiting
  • Safe Operating Area (SOA) protection
  • Requires only a few external components
  • Excellent line and load regulation
  • TO-220 package for efficient heat dissipation
  • High reliability and long-term stability
  • Easy integration into power supply circuits
  • Suitable for industrial, commercial, and hobby applications