MC7805CTG
Overview
The MC7805CTG is a robust linear voltage regulator designed to provide a stable 5V positive output at currents up to 1A. It is a industry-standard solution for local, on-card regulation, featuring built-in thermal overload protection and short-circuit current limiting to ensure system reliability. This TO-220 packaged device is highly versatile and requires no external components for basic operation, making it a staple for power supply design.
Why Choose This Part
This regulator offers internal thermal overload protection and output transistor safe-area compensation, making it nearly indestructible under standard operating conditions. Its high ripple rejection of 83dB at 120Hz provides clean power for sensitive electronics, while the TO-220 package allows for easy heatsink mounting in high-power dissipation scenarios.
Applications
Key Specifications
Getting Started
To use the MC7805CTG, connect the input pin to a DC source between 7V and 35V and the ground pin to your common rail. While not strictly required for operation, it is best practice to place a 0.33uF ceramic capacitor on the input and a 0.1uF capacitor on the output to improve high-frequency stability and transient response. If the voltage differential or current load is high, ensure the device is attached to a suitable heatsink to stay within the 0 to 125 degrees Celsius operating range.
MC7805 Family
Comparing specs that differ across variants. The current part is highlighted.
| Part Number | PSRR | Temp Range | Current - Quiescent (Iq) | Stock |
|---|---|---|---|---|
| MC7805CTG (this part) | 120Hz | 0degC ~ 125degC | 6.5 mA | 64,088 |
| MC7805BTG (onsemi) | 120Hz | -40degC ~ 125degC | 8 mA | 13,264 |



