LM/LM 5-Amp Adjustable Regulators. General Description. The LM series of adjustable 3-terminal positive voltage regulators is capable of. LM LM 5-Amp Adjustable Regulators. General Description. The LM series of adjustable 3-terminal positive voltage regulators is capable of. The LM is rated for −55˚C ≤ TJ ≤ +˚C, and the LM is rated for .. Reproduction of TI information in TI data books or data sheets is permissible only if.

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LM317 / LM338 / LM350 Voltage Regulator Calculator

Ceramic capacitors are also good at high frequencies, but some types have a large decrease in capacitance datashewt frequencies around 0. Capacitor wikipedialookup. Buck converter wikipedialookup. Overload protection remains functional even if the adjustment pin is accidentally disconnected.

Besides replacing fixed regulators or discrete fatasheet, the LM is useful in a wide variety of other applications. Pulse-width modulation wikipedialookup. An optional output capacitor can be added to improve transient response.

The bypass capacitor on the adjustment terminal can discharge through a low current junction. Surge protector wikipedialookup.

Regulation is measured at constant junction temperature. Variable-frequency drive wikipedialookup. The device is more sensitive to the absence of input bypassing when adjustment or output capacitors are used byt the above values will eliminate the possibility of problems. Voltage regulator wikipedialookup. They are exceptionally easy to use and require only 2 resistors to set the output voltage. Three-phase electric power wikipedialookup.


Stray voltage wikipedialookup. If the bypass capacitor is used, it is sometimes necessary to include protection diodes to prevent the capacitor from discharging through internal low current paths and damaging the device. Changes in output voltage due to heating effects are taken into account separately by thermal rejection.

Since the regulator is “floating” and sees only the input-to-output differential voltage, supplies of several hundred volts can be regulated as long as the maximum input to input differential is not exceeded. Tube sound wikipedialookup. Ohm’s law wikipedialookup.

Solid tantalum capacitors have low impedance even at high frequencies. Although the surge is short, there is enough energy to damage parts of the IC. For this reason, 0. See the voltage regulator datasheets above for specific details regarding the dropout voltage and heatsink requirements. Power inverter wikipedialookup.

For example, a 15V regulator with 0.

LMK Datasheet(PDF) – National Semiconductor (TI)

Last update 6 January This publication supersedes and replaces all information previously supplied. The discharge current depends on the value of the capacitor, the output voltage of the regulator, and the rate of decrease of VI. Normally, no capacitors are needed unless the device is situated far from the input filter capacitors in which case an input bypass is needed.


The LM family is supplied in a standard 3-lead transistor package. The current limit circuitry allows peak currents of datasehet to 12A to be drawn from the regulator for short periods of time. The dropout voltage of the IC regulator is about 1.

Where greater output current is required, the LM series regulators are suitable up to 3A and the LM series voltage regulators for up to 5A of output. Opto-isolator wikipedialookup. Solar micro-inverter wikipedialookup. Control system wikipedialookup. If there is insufficient load on the output, the output will rise.

LMK Hoja de datos ( Datasheet PDF ) – 5A Positive Adjustable Voltage Regulator

The LM voltage regulators can provide up to 1. When an output capacitor is connected to a regulator and the input is shorted, the output capacitor will discharge into the output of the regulator.

In general, the best type of capacitors to use are solid tantalum.