L7818CV TO220 Voltage-Regulator IC
The L7818CV is a fixed 18V linear voltage regulator IC designed to deliver a stable output with minimal noise and ripple. Encased in a TO-220 package, it supports up to 1.5A output current, making it a suitable choice for moderate-load systems such as analog devices, high-voltage embedded circuits, and signal processing units.
Engineered with internal thermal shutdown, overload protection, and safe area compensation, it ensures reliable performance under varying load and input conditions. The L7818CV is perfect for stepping down higher voltages (like 24V or 30V) to a consistent 18V DC for critical components.
๐ Technical Details
| Parameter | Details |
|---|---|
| Output Voltage | 18V (Fixed) |
| Input Voltage Range | Up to 35V |
| Output Current | Max 1.5A |
| Dropout Voltage | 2V (typical) |
| Thermal Shutdown | Yes |
| Short Circuit Protection | Yes |
| Package Type | TO-220 |
| Operating Temp | 0ยฐC to +125ยฐC |
| Mounting | Through-hole, heatsink compatible |
| Dimensions | Standard TO-220 form factor |
๐ก Use Cases & Applications
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โ๏ธ Industrial Power Supplies
Convert 24โ30V power lines to stable 18V DC for controllers, relays, or sensors. -
๐งช Analog Circuit Design
Used to power op-amps, ADCs, and other analog ICs that require precise voltage. -
๐ง DIY Bench Power Supplies
Great for building regulated high-voltage outputs in DIY lab supplies or breadboard experiments. -
๐ Embedded Systems
Supplies consistent voltage to high-voltage logic devices or older embedded systems. -
๐ก LED Driver Circuits
Can regulate voltage for 18V LED strips or driver circuits requiring fixed input.
๐ ๏ธ Pair With
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๐ฉ Electronics Components โ Capacitors, diodes, and heat sinks to support regulation.
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๐ Power Supplies โ For pre-regulated or unregulated input sources.
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๐งฐ Tools and Accessories โ Multimeters or soldering tools for setup.
๐ฅ YouTube Tutorial
๐บ Learn how to use L78XX series regulators effectively
๐ Watch Tutorial
โ ๏ธ Precautions & Tips
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๐ก๏ธ Use with a heatsink when drawing over 500mA continuously to prevent thermal shutdown.
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๐งฒ Place input and output capacitors (e.g., 0.33ฮผF and 0.1ฮผF) close to the regulator for improved stability.
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๐ Avoid reverse polarity on input โ not reverse protected.
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โก Ensure input is at least 2โ3V higher than the output to maintain regulation.
๐ Summary & Call-to-Action
The L7818CV Voltage Regulator is a reliable solution for applications demanding a stable 18V supply. Its robust design, easy integration, and protective features make it ideal for prototyping, embedded use, and industrial projects.
๐ Order now at Electroway โ precision power in your control.
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