7815 IC Fixed Positive 15V Voltage Regulator
The LM7815 is a three-terminal positive voltage regulator from the popular 78xx series, designed to provide a fixed 15V output. It regulates higher, unregulated input voltages down to a consistent and clean 15V DC, making it ideal for circuits requiring precise voltage. With its simple design, ease of use, and dependable performance, the LM7815 remains a standard solution for regulated 15V power delivery in hobbyist and industrial environments.
The regulator accepts input voltages typically from 17V to 30V and supplies up to 1A of current when used with a heatsink providing reliable and stable power for analog and digital applications. Its internal design integrates features such as thermal shutdown, current limiting, and short-circuit protection, which enhance operational reliability and protect connected devices from power faults.
You can use the LM7815 in both analog and digital applications, such as op-amp circuits, sensor interfaces, audio amplifiers, and microcontroller-based systems. Adding bypass capacitors at the input and output helps improve ripple rejection and transient response.
Pin Configuration (TO-220 Package)
| Pin | Name | Description |
|---|---|---|
| 1 | Input | Unregulated DC input |
| 2 | Ground | Common ground |
| 3 | Output | Regulated 15V output |
Applications
15V regulated power supply
Analog and audio amplifier circuits
Power for microcontrollers and sensors
Robotics and embedded devices
Precision instrumentation
Bench power supplies
Signal conditioning systems
Key Features
Fixed and stable 15V output
Up to 1A current output
Wide input voltage range
Built-in thermal shutdown
Short circuit protection
Overcurrent limiting
Available in standard packages
Specifications Table
| Parameter | Value |
|---|---|
| Output Voltage | 15V ± 2% |
| Maximum Output Current | 1A (with heatsink) |
| Input Voltage Range | 17V to 30V |
| Dropout Voltage | ~2V ‘ |
| Line Regulation | ~8–12 mV |
| Load Regulation | 50–150 mV |
| Quiescent Current | 5–8 mA (typical) |
| Ripple Rejection | 60–80 dB |
| Operating Temperature Range | 0°C to +125°C |
| Junction Temperature Max | +150°C |
| Storage Temperature Range | −65°C to +150°C |
| Package Options | TO-220, TO-92, DPAK, SOT-223 |
