Greetings, friends. Today made a small selection of material for the assembly of a regulated power supply. LT1083CP is used as the regulating element, the voltage regulation limits lie in the range from 1.5 to 30V, current up to...Electronics Projects, LT1083 Adjustable power supply "power electronic projects, power supply circuit, power supply project, " Date 2019/08/04
Greetings, friends. Today made a small selection of material for the assembly of a regulated power supply. LT1083CP is used as the regulating element, the voltage regulation limits lie in the range from 1.5 to 30V, current up to 7 Amps. Just want to draw your attention to how the circuit is connected to the LED. As I understand it, it serves as an indicator of the enabled state of the power supply. If we have an adjustable voltage value at the output, and the regulator of this value will be twisted to the minimum value, the LED will simply not glow, so I think it’s advisable to connect the LED + R3 chain to the input of the stabilizer U1, where the voltage is more or less constant, not counting the possible drawdown high currents.
The LT1083 series of positive adjustable regulators are designed to provide 7.5A, 5A and 3A with higher efficiency than currently available devices. All internal circuitry is designed to operate down to 1V input-to-output differential and the dropout voltage is fully specified as a function of load current.
Dropout is guaranteed at a maximum of 1.5V at maximum output current, decreasing at lower load currents. On-chip trimming adjusts the reference voltage to 1%. Current limit is also trimmed, minimizing the stress on both the regulator and power source circuitry under overload conditions.
The LT1083-LT108-LT1085 devices are pin compatible with older 3-terminal regulators. A 10μF output capacitor is required on these new devices. However, this is included in most regulator designs. Unlike PNP regulators, where up to 10% of the output current is wasted as quiescent current, the LT1083 quiescent current flows into the load, increasing efficiency.