See the voltage regulator datasheets above for specific details regarding the dropout voltage and heatsink requirements. You dont want to use too high an input voltage as the excess will need to be dissipated as heat through the regulator. Therefore, the input voltage to the LM317 LM338 LM350 regulator will need to be at least 1.5V to 2.5V greater than the desired output voltage. Note: The dropout voltage of the IC regulator is about 1.5 to 2.5 Volts, dependent on the output current (I OUT ). The following schematics show typical circuit applications for the LM317 LM338 LM350 voltage regulators. NOTE: this online voltage regulator calculator requires that JavaScript be enabled on your browser. To determine the output voltage, enter values for the program (R 1 ) and set (R 2 ) resistors and hit the Calculate button. The LM317 LM338 LM350 series of voltage regulators can also be configured to regulate current in a circuit.įor information about current regulation with these integrated circuit (IC) regulators see the LM317 LM338 LM350 Current Regulator Calculator. However, other values such as 150 or 220 ohms can also be used for R 1. Typically, the program resistor (R 1 ) is set at 240 ohms for the LM117, LM317, LM138 and LM150 regulators.įor the LM338 and LM350 regulators, 120 ohms is typically used for the program resistor R 1. This Voltage Regulator Calculator will work for all voltage regulators with a reference voltage (V REF ) of 1.25. You can use this Voltage Regulator Calculator to vary the value of the program resistor (R 1 ) and output set resistor (R 2 ) and calculate the output voltage for the LM317 LM338 LM350 family of three terminal adjustable voltage regulators. Refer to the adjustable regulator data sheets below for more information about the LM317 LM338 LM350 adjustable voltage regulators. The adjustment terminal of the regulator can be bypassed to achieve very high ripple rejection. Normally, no capacitors are needed unless the device is situated more than 150 mm (6 inches) from the input filter capacitors in which case an input bypass capacitor is required.Īn optional output capacitor can be added to improve transient response.

The LM317 LM338 LM350 voltage regulators offer full overload protection. Persamaan Ic Lm317 Full Overload Protection

You can expect performance of both the line and load regulation using the LM317 LM338 LM350 adjustable voltage regulators over that of standard fixed voltage regulator.

Persamaan Ic Lm317 Full Overload Protection.

Persamaan Ic Lm317 Series Regulators Are.

Persamaan ic lm317