L7918 Linear Negative Voltage Regulator – Fixed -18V Output

L7918 Linear Negative Voltage Regulator – Stable -18V Fixed Output

The L7918 is a linear negative voltage regulator from the 79xx series, designed to deliver a stable and regulated -18V DC output from a negative input voltage source.

It is widely used in professional analog circuits, audio systems, operational amplifier designs, and dual-supply power systems that require clean and reliable negative voltage.

The regulator supports up to 1A of output current and includes built-in thermal shutdown, overcurrent protection, and short-circuit protection, ensuring safe and dependable operation.

Its TO-220 package allows easy mounting and supports heatsink installation for higher power dissipation.

✅ Specifications:

• Type: Linear Negative Voltage Regulator
• Model: L7918 / 7918
• Output Voltage: -18V Fixed
• Maximum Output Current: 1A
• Recommended Input Voltage: -21V to -35V DC
• Maximum Input Voltage: -35V
• Output Accuracy: ±4%
• Ripple & Noise: Low
• Protection Features:
• Thermal Shutdown
• Overcurrent Protection
• Short-Circuit Protection
• Package Type: TO-220
• Operating Temperature: 0°C to 125°C
• Weight: ≈ 2.5g

🔹 Key Features:

✔ Stable -18V output

✔ Ideal for professional analog and audio circuits

✔ Low-noise performance

✔ Built-in safety protections

✔ Perfect for dual power supply designs

📌 Common Applications:

• Operational amplifier circuits
• Audio signal processing
• Dual-supply power systems
• Analog electronics
• Linear power supplies