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The 7805 is a fixed voltage linear regulator that outputs 5V at up to 1A current with an input voltage range of 7 – 35V.
- Constant +5V output regulator to power microcontrollers and sensors in most of the projects
- Adjustable Output Regulator
- Current Limiter for certain applications
- Regulated Dual Supply
- Output Polarity-Reversal-Protection Circuit
- Linear regulators have less ripple on their outputs compared to DC-DC converters that can be used for the same basic purpose,
- However, the trade-off is that the linear regulators also tend to dissipate more heat in the process.
- The reason is that the linear regulator uses a series pass transistor on its output to drop the excess voltage.
- The power dissipation of a linear regulator is dependent on the difference between the input voltage (Vin) and the output voltage (Vout) along with the amount of current that is being drawn from the regulator.
- The larger the voltage difference is between Vin and Vout, the higher the power dissipation will be which limits how much current can be drawn from the device.