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Variable-voltage-regulator – Circuit Schematic
Variable-voltage-regulator
The variable voltage regulator lets you adjust the output voltage of a fixed de power supply between 1.2 and 37 V de, and will supply the output current in exc...
Regulator-current-source – Circuit Schematic
Regulator-current-source
The circuit powers the load via the regulator"s input instead of its output. Because the regulator"s output sees constant dummy load R1, it tries to consume a ...
High-voltage-regulator – Circuit Schematic
High-voltage-regulator
The regulator delivers 100-V at 100 mA and withstands shorts to ground. Even at 100 V output, the LT317A functions in the normal mode, maintaining 1.2 V betwee...
High-voltage-bucking-regulator – Circuit Schematic
High-voltage-bucking-regulator
This circuit is basically tbe classic bucking regulator, except it uses a TMOS N-channel power FET for the chopper and creates its own supply for the gate cont...
Positive-regulator – Circuit Schematic
Positive-regulator
In the circuit, Ql and Q2 are connected in the classic SCR or thyristor configuration. Where higher input voltages or minimum component count are required, the...
Efficient-negative-voltage-regulator – Circuit Schematic
Efficient-negative-voltage-regulator
One v;ay to provide good negative-voltage regulation is with a low-dropout positive-voltage regulator operating from a well-isolated secondary winding of switc...
Positive-regulator-with-pnp-boost – Circuit Schematic
Positive-regulator-with-pnp-boost
The IC8211 provides the voltage reference and regulator amplifier, while Ql is the series pass transistor. Rl defines the output current of the IC8211, while...
+15-V-1-a-regulated-power-supply – Circuit Schematic
+15-V-1-a-regulated-power-supply
The supply receives + 20 Vdc from the rectifier/filter section. This is applied to pins 11 and 12 of the uA723, as well as to the collector of the 2N3055 serie...
Dual-tracking-regulator – Circuit Schematic
Dual-tracking-regulator
A MAX634 inverting regulator is combined with a MAX630 to provide a dual tracking ±15 output from a 12-V battery. The reference for the -15 V output is deri...
Low-dropout-linear-regulator – Circuit Schematic
Low-dropout-linear-regulator
This linear post regulator provides 12 V at 3 A. It employs TL431 reference Ul which, without additional amplification, drives TMOS MTP3055A gate Ql series pas...
Precision buffered reference – Circuit Schematic
Precision buffered reference
The circuit will provide 3 preset currents which will remain constant despite variations of ambient temperature or line voltage. ZDl produces-a temperature stab...
Low power regulator reference – Circuit Schematic
Low power regulator reference
This simple reference circuit provides a stable voltage reference almost totally free of supply voltage hash...
Power pack for battery-powered devices – Circuit Schematic
Power pack for battery-powered devices
This circuit gives a regulated output of between 5 V and 15 Vdc, adjusted and set by a preset resistor. Current output up to about 350 mA...
Variable zener diode – Circuit Schematic
Variable zener diode
The circuit behaves like a zener diode over a large range of voltages. The current passing through the voltage divider R1-R2 is substantially larger than the tr...
Regulated voltage divider – Circuit Schematic
Regulated voltage divider
ICs requiring 3 or 6 volts can be run from a battery or fixed regulated supply of a higher voltage by using the circuit shown. The transistor should be mounted ...
Adjustable output regulator – Circuit Schematic
Adjustable output regulator
The addition of an operational amplifier allows adjustment to higher or intermediate values while retaining regulation characteristics...
Low voltage regulators – Circuit Schematic
Low voltage regulators
These short-circuit protected regulators give 6, 7, and 9 V from an automobile battery supply of 13 V nominal; however, they will function just as well if conne...
Mobile voltage regulator – Circuit Schematic
Mobile voltage regulator
This simple mobile voltage regulator circuit may save your two meter or CB transceiver if the voltage regulator fails. The 2N3055 should be heat sinked if curre...
Transistor increases zener rating – Circuit Schematic
Transistor increases zener rating
The simple zener shunt in A may not handle sufficient current if the zener available is of low wattage. A power transistor will do most of the work for the zene...
Single-ended regulator – Circuit Schematic
Single-ended regulator
In this conventional single-ended regulator circuit, the two outputs of the:SG1524 are connected in parallel for effective 0-90% duty-cycle modulation...