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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Under sustained loading conditions, the current limit decreases to a safe value protecting the regulator.

Although the surge is short, there datssheet enough energy to damage parts of the IC. Thermal runaway wikipedialookup. For example, a 15V regulator with 0. Although the LM is stable with no output capacitors, like any feedback circuit, certain values of external capacitance can cause excessive ringing. No protection diodes are required for output voltages of less than 25V or greater than 10 uF capacitance.

Schmitt trigger wikipedialookup. See the voltage regulator datasheets above for specific details regarding the dropout voltage and heatsink requirements. Resistive opto-isolator wikipedialookup.

Rectifier wikipedialookup. Voltage regulator wikipedialookup.

LMK Datasheet(PDF) – STMicroelectronics

Regulator with Protection Diodes. Changes in output voltage due to heating effects are taken into account separately by thermal rejection. Tube sound wikipedialookup. Careful circuit design has resulted in outstanding load and line regulation comparable to many commercial power supplies. 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 ,m338k case. The ground of R2 can be returned near the ground of the load to provide remote ground sensing and improve load regulation.


Normally, no capacitors are needed unless the device is situated far from the input filter capacitors in which case an input bypass is needed. Mains electricity wikipedialookup. Current source wikipedialookup.

An optional output capacitor can be added to improve transient response. An input bypass capacitor is recommended. 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. Control system wikipedialookup.

Voltage optimisation wikipedialookup.

LM338K Datasheet

Last update 6 January Current mirror wikipedialookup. To determine the output voltage, enter values for the program R 1 and set R 2 resistors and hit the “Calculate” button. In the LM this discharge path is through a large junction that is able to sustain 25A surge with no problem.

Stray voltage wikipedialookup. A unique feature of the LM family is time-dependent current limiting. Besides replacing fixed regulators or discrete designs, the LM is useful in a wide variety of other applications. Thank you for your participation! Electrical ballast wikipedialookup. Created 28 July The adjustment terminal of the regulator can be bypassed to achieve very high ripple rejection.


The adjustment terminal can be bypassed to achieve very high ripple rejection ratios which are difficult to achieve with standard 3-terminal regulators. They are exceptionally easy to use and dataaheet only 2 resistors to set the output voltage. Specifications mentioned in this publication are subject to change without notice. However, SGS-THOMSON Microelectronics assumes no responsability for the daatsheet of use of such information nor for any infringement of patents or other rights of third parties which may results from its use.

This eliminates line drops from appearing effectively in series with the reference and degrading regulation.

PDF LM338K Datasheet ( Hoja de datos )

However, other values such as or ohms can also be used for R 1. This occurs with values between pF and pF. This bypass capacitor prevents ripple form being amplified as the output voltage is increased.

The discharge current depends on the value of the capacitor, the output voltage of the regulator, and the rate of decrease of VI. The dropout voltage of the IC regulator is about 1. If there is insufficient load on the output, the output will rise.