LM338K DATASHEET PDF

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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Besides replacing fixed regulators or discrete designs, the LM is useful in a wide variety of other applications. Two-port network wikipedialookup. An input bypass capacitor is recommended.

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.

You don’t want to use too high an input voltage as the excess will need to be dissipated as heat through the regulator. The ground of R2 can be returned near the ground of the load to provide remote ground sensing and improve load regulation. Ceramic capacitors are also good at high frequencies, but some types have a large decrease in capacitance at frequencies around 0.

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National Semiconductor

Tube sound wikipedialookup. Plan to be about 3V about the desired output voltage. Pulse-width modulation wikipedialookup. Mains electricity wikipedialookup. This eliminates line drops from appearing effectively in series with the reference and degrading regulation. The bypass capacitor on the adjustment terminal can discharge through a low current junction. Normally, no capacitors are needed unless the dagasheet is situated more than mm 6 inches from the input filter capacitors darasheet which case an input bypass capacitor is required.

Solid tantalum capacitors have low impedance even at high frequencies. Surge protector wikipedialookup.

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

Schmitt trigger wikipedialookup. Integrating ADC wikipedialookup. For this reason, 0. Switched-mode power supply wikipedialookup. Variable-frequency drive wikipedialookup. Although the surge is short, there is enough energy to damage parts of the IC. Under sustained loading conditions, the current limit decreases to a safe value protecting the regulator.

They are exceptionally easy to use and require only 2 resistors to set the output voltage. This allows the LM to be used with heavy transient loads and speeds start-up under full-load conditions. Created 28 July This occurs with values between pF and pF.

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LM / LM / LM Voltage Regulator Calculator and Circuits

Ohm’s law wikipedialookup. Solid tantalum capacitors can be used on the voltage output to improve the ripple rejection of the voltage regulator. Regulation is measured at constant junction temperature. In the LM this discharge path is through a large junction that is able to sustain 25A surge with no problem. Control system wikipedialookup. 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.

Current mirror wikipedialookup. This is not true of other types of positive regulators. Discharge occurs when either the input or output is shorted. Last update 6 January When external capacitors are used with a voltage regulator it may be necessary to use protection diodes to prevent the capacitors from discharging through low current points into the voltage regulator.

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