L7818CV Transistor TO-220 Code: 89270651

The L7818 is a three-terminal positive linear voltage regulator IC that steps down a DC input voltage (up to 35 V) into a stable, fixed +18 V output at currents up to 1.5 A.

Key Specifications

• Fixed Output Voltage:+18 V
• Maximum Input Voltage:Up to 35 V DC (recommended input around 21 V to 23 V for a stable 18 V output)
• Output Current:1 A to 1.5 A
• Quiescent / Standby Current:8 mA
• Operating Temperature Range:-55 C to +150 C
• Packages:Commonly available in TO-220

Built-in Protections

• Thermal Overload Protection:Shuts down the IC if it overheats
• Short-Circuit Protection:Internal current limiting prevents damage from direct shorts
• Safe Area Protection:Protects the output transistors

Common Applications

• General-purpose DC-DC step-down local voltage regulation
• Power supplies and battery management systems
• Microcontroller and telecommunication circuits