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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Last update 6 January An input bypass capacitor is recommended. Transistor wikipedialookup.

Changes in output voltage due to heating effects are taken into account separately by thermal rejection. Please update your bookmarks. Even small capacitors can have a low enough internal series resistance to be able to deliver 20A spikes when shorted. Switched-mode power supply wikipedialookup. Regulator with Line Resistance in Output Lead.

Regulator with Protection Diodes.

LM338K Datasheet

An optional output capacitor can be added to improve transient response. In the LM this discharge path is through a large junction that is able to sustain 25A surge with no problem.

Although the surge is short, there is enough energy to damage parts of the IC. The ground of R2 can be returned near the ground of the load to provide remote ground sensing and improve load regulation. Two-port network wikipedialookup. 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.


Rectifier wikipedialookup. This bypass capacitor prevents ripple form being amplified as the output voltage is increased. See the voltage regulator datasheets above for specific details regarding the dropout voltage and heatsink requirements. The bypass capacitor on the adjustment terminal can discharge through a low current junction.

Buck converter wikipedialookup. Under sustained loading conditions, the current limit ,m338k to a safe value protecting the regulator. This allows the LM to be used with heavy transient loads and speeds start-up under full-load conditions. Three-phase electric power wikipedialookup. Regulation is measured at constant junction temperature. Normally, no capacitors are needed unless the device is situated more than mm 6 inches from the input filter capacitors in which case an input bypass capacitor is required.

Overload protection remains functional even if the adjustment pin is accidentally disconnected.

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. Mains electricity wikipedialookup.

LM / LM / LM Voltage Regulator Calculator and Circuits

This is not true of other lm38k of positive regulators. 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. The dropout voltage of the IC regulator is about 1. Careful circuit design l3m38k resulted in outstanding lm338m and line regulation comparable to many commercial power supplies. However, SGS-THOMSON Microelectronics assumes no responsability for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use.


Capacitor wikipedialookup. Since the regulator is “floating” and sees only the input-to-output differential voltage, supplies of several hundred volts can be regulated l,338k long as the maximum input to input differential is not exceeded. Variable-frequency drive wikipedialookup. Normally, no capacitors are needed unless the device is situated far from the dayasheet filter capacitors in which case an input bypass is needed.

The current limit circuitry allows peak currents of up to 12A to be drawn from the regulator for short periods of time. The LM family is supplied in a standard 3-lead transistor package. Solar micro-inverter wikipedialookup. If there is insufficient load on the output, the output will rise. A unique feature of the LM family is time-dependent current limiting. Stray voltage 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.