The LM7809 is a fixed +9V voltage regulator from the LM78xx series, designed to deliver a stable 9V output for a wide range of electronic devices. With a maximum output current of 1.5A, it ensures consistent performance in both professional and educational electronics applications. Integrated protection features such as thermal overload shutdown and short-circuit current limiting enhance its reliability.
For optimal performance, a minimum input of 11V is required, and a heat sink is strongly recommended in current-demanding circuits, as the voltage drop is dissipated as heat. This IC is ideal for embedded systems, power supply circuits, and general-purpose voltage regulation.
Fixed +9V Positive Output Voltage
Minimum Input Voltage: 11V DC
Maximum Input Voltage: 35V DC
Output Current: Up to 1.5A
PSRR / Ripple Rejection: 55 dB
Internal Thermal Overload Protection
Short-Circuit Current Limiting
Output Type: Fixed
Junction Temperature: Up to 125°C
Available in TO-220 Package
| Parameter | Value |
|---|---|
| Output Voltage | +9V |
| Input Voltage Range | 11V to 35V |
| Max Output Current | 1.5A |
| Ripple Rejection | 55 dB |
| Protection Features | Thermal, Short Circuit |
| Package Type | TO-220 |
| Operating Temperature Range | Up to 125°C |
Embedded systems and development boards
Power regulation for analog/digital electronics
Consumer and industrial electronics
DIY electronics and hobbyist circuits
Voltage step-down conversion circuits
Product specifications, features, and design may change over time due to product updates or improvements.
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