on video How to make adjustable Voltage regulator with Mosfet

 

Voltage regulators are a common feature in many circuits to ensure that a constant, stable voltage is supplied to sensitive electronics. The way it works is typical of many analog circuits, and is the judicious and elegant use of feedback to fine-tune the output to the desired level.

Voltage regulator overview

When stable and reliable voltage is required, voltage regulators are the go-to components. Voltage regulators take an input voltage and create a regulated output voltage regardless of the input voltage at either a fixed voltage level or an adjustable voltage level (by selecting the correct external components). This automatic regulation of the output voltage level is handled by various feedback technologies, some as simple as a zener diode while others contain complex feedback imprints that can improve performance, reliability, and efficiency, adding other features such as increasing the output voltage above the input to the voltage regulator.

How do linear voltage regulators work?

Maintaining a constant voltage with an unknown or noisy input (or worse) requires a feedback signal to know what adjustments to make. Linear regulators use a power transistor (either a BJT or MOSFET depending on the component used) as a variable contactor that acts like the first half of the voltage divider network. The voltage divider output is used as feedback to appropriately drive the power transistor to maintain a constant output voltage. Unfortunately, since the transistor acts like a resistor, it wastes a lot of energy by converting it into heat, often a lot of heat. Since the total power converted to heat is equal to the voltage drop between the input voltage and output voltage matched multiplied by the current, the intermittent power can be very high and good heatsinks are needed.

 

Voltage regulators are a common feature in many circuits to ensure that a constant, stable voltage is supplied to sensitive electronics. The way it works is typical of many analog circuits, and is the judicious and elegant use of feedback to fine-tune the output to the desired level.

Voltage regulator overview

When stable and reliable voltage is required, voltage regulators are the go-to components. Voltage regulators take an input voltage and create a regulated output voltage regardless of the input voltage at either a fixed voltage level or an adjustable voltage level (by selecting the correct external components). This automatic regulation of the output voltage level is handled by various feedback technologies, some as simple as a zener diode while others contain complex feedback imprints that can improve performance, reliability, and efficiency, adding other features such as increasing the output voltage above the input to the voltage regulator.

How do linear voltage regulators work?

Maintaining a constant voltage with an unknown or noisy input (or worse) requires a feedback signal to know what adjustments to make. Linear regulators use a power transistor (either a BJT or MOSFET depending on the component used) as a variable contactor that acts like the first half of the voltage divider network. The voltage divider output is used as feedback to appropriately drive the power transistor to maintain a constant output voltage. Unfortunately, since the transistor acts like a resistor, it wastes a lot of energy by converting it into heat, often a lot of heat. Since the total power converted to heat is equal to the voltage drop between the input voltage and output voltage matched multiplied by the current, the intermittent power can be very high and good heatsinks are needed.

 

Voltage regulators are a common feature in many circuits to ensure that a constant, stable voltage is supplied to sensitive electronics. The way it works is typical of many analog circuits, and is the judicious and elegant use of feedback to fine-tune the output to the desired level.

Voltage regulator overview

When stable and reliable voltage is required, voltage regulators are the go-to components. Voltage regulators take an input voltage and create a regulated output voltage regardless of the input voltage at either a fixed voltage level or an adjustable voltage level (by selecting the correct external components). This automatic regulation of the output voltage level is handled by various feedback technologies, some as simple as a zener diode while others contain complex feedback imprints that can improve performance, reliability, and efficiency, adding other features such as increasing the output voltage above the input to the voltage regulator.

How do linear voltage regulators work?

Maintaining a constant voltage with an unknown or noisy input (or worse) requires a feedback signal to know what adjustments to make. Linear regulators use a power transistor (either a BJT or MOSFET depending on the component used) as a variable contactor that acts like the first half of the voltage divider network. The voltage divider output is used as feedback to appropriately drive the power transistor to maintain a constant output voltage. Unfortunately, since the transistor acts like a resistor, it wastes a lot of energy by converting it into heat, often a lot of heat. Since the total power converted to heat is equal to the voltage drop between the input voltage and output voltage matched multiplied by the current, the intermittent power can be very high and good heatsinks are needed.

 

Voltage regulators are a common feature in many circuits to ensure that a constant, stable voltage is supplied to sensitive electronics. The way it works is typical of many analog circuits, and is the judicious and elegant use of feedback to fine-tune the output to the desired level.

Voltage regulator overview

When stable and reliable voltage is required, voltage regulators are the go-to components. Voltage regulators take an input voltage and create a regulated output voltage regardless of the input voltage at either a fixed voltage level or an adjustable voltage level (by selecting the correct external components). This automatic regulation of the output voltage level is handled by various feedback technologies, some as simple as a zener diode while others contain complex feedback imprints that can improve performance, reliability, and efficiency, adding other features such as increasing the output voltage above the input to the voltage regulator.

How do linear voltage regulators work?

Maintaining a constant voltage with an unknown or noisy input (or worse) requires a feedback signal to know what adjustments to make. Linear regulators use a power transistor (either a BJT or MOSFET depending on the component used) as a variable contactor that acts like the first half of the voltage divider network. The voltage divider output is used as feedback to appropriately drive the power transistor to maintain a constant output voltage. Unfortunately, since the transistor acts like a resistor, it wastes a lot of energy by converting it into heat, often a lot of heat. Since the total power converted to heat is equal to the voltage drop between the input voltage and output voltage matched multiplied by the current, the intermittent power can be very high and good heatsinks are needed.