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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An input bypass capacitor is recommended. For example, a 15V regulator with 0.

Regulator with Line Resistance in Output Lead. Normally, no capacitors are needed unless the device is situated far from the input filter capacitors in which case an input bypass is needed.

Stray voltage wikipedialookup. The dropout voltage of the IC regulator is about 1. Two-port network wikipedialookup. Current mirror wikipedialookup. However, other values such as or ohms can also be daatsheet for R 1.

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

Integrating ADC wikipedialookup. Resistive opto-isolator 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. With the TO-3 package, it is easy to minimize the resistance from the case to the set resistor, by using 2 separate leads to the case. Please update your bookmarks.


Rectifier wikipedialookup. Even small capacitors can have a low enough internal series resistance to be able to deliver 20A spikes when shorted. This publication supersedes and replaces all information previously supplied. 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.

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To determine the output voltage, enter values for the program R 1 and set R 2 resistors and hit the “Calculate” button. Overload protection remains functional even if the adjustment pin is accidentally disconnected. Careful circuit design has resulted in outstanding load and line regulation comparable to many commercial power supplies. Solid tantalum capacitors can be used on the voltage output to improve the ripple rejection of the voltage regulator.

Figure 3 shows an LM with protection diodes included for use with outputs greater than 25V and high values of output capacitance. The adjustment terminal can be bypassed to ground on the LM to improve ripple rejection. This bypass capacitor prevents ripple form being amplified as the output voltage is increased.

National Semiconductor

Last update 6 January Surge protector wikipedialookup. In the LM this discharge path is through a large dayasheet that is able to sustain 25A surge with no problem.

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.


This is not true of other types of positive regulators.

Schmitt trigger wikipedialookup. Also included on the chip are thermal overload protection and safe area protection for the power transistor.

LM338K Datasheet

Under sustained loading conditions, the current limit decreases to a datasheeg value protecting the regulator. Created 28 July The LM family is supplied in a standard 3-lead transistor package. For this reason, 0. Although the surge is very short in duration, there is enough energy to damage parts of the regulator IC. Voltage optimisation wikipedialookup. Specifications mentioned in this publication are subject to change without notice.

Pulse-width modulation wikipedialookup. Voltage regulator wikipedialookup. Tube sound wikipedialookup. Although the LM is stable with no output capacitors, like any feedback circuit, lm338j values of external capacitance can cause excessive ringing.

Variable-frequency drive wikipedialookup. See the voltage regulator datasheets above for specific details regarding the dropout voltage and heatsink requirements. The LM voltage regulators can provide up to 1. Current source wikipedialookup. 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.

This allows the LM to be used with heavy transient loads and speeds start-up under full-load conditions. Mains electricity wikipedialookup.