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
An optional output capacitor can be added to improve transient response. However, other values such as or ohms can also be used for R 1. You don’t want to use too high an input voltage as the excess will need to be dissipated as heat through the regulator. Plan to be about 3V about the desired output voltage. The adjustment terminal of the regulator can be bypassed to achieve very high ripple rejection.
Last update 6 January No protection diodes are required for output voltages of less than 25V or greater than 10 uF capacitance.
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 occurs with values between pF and pF. Alternating current wikipedialookup. Specifications mentioned in this publication are subject to change without notice. An input bypass capacitor is recommended.
LM Datasheet and Product Info | Analog Devices
Two-port network wikipedialookup. Please update your bookmarks. 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 very short in duration, there lm383k enough energy to damage parts of the regulator IC. Solid tantalum capacitors have low impedance even at high frequencies. Even small capacitors can have lm38k low enough internal series resistance to be able to deliver 20A spikes when shorted. 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.
If there is insufficient load on the output, the output will rise.
The discharge current depends on the value of the capacitor, the output voltage of the regulator, and the rate of decrease of VI. Distribution management system wikipedialookup. Surge protector wikipedialookup.
Variable-frequency drive wikipedialookup. The LM voltage regulators can provide up to 1. 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.
Regulator with Protection Diodes. Besides replacing fixed regulators or discrete designs, the LM is useful in a wide variety of other applications. With the TO-3 package, catasheet is easy to minimize the resistance from the case to the set resistor, by using 2 separate leads to the case.
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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. Although the LM is stable with no output capacitors, like any datasneet circuit, certain values of external capacitance can cause excessive ringing. Changes in output voltage due to heating effects are taken into account separately by thermal rejection.
Buck converter wikipedialookup. Electrical ballast wikipedialookup. The ground of R2 can be returned near the ground of the load to provide remote ground sensing and improve load regulation.
Regulator with Line Resistance in Output Lead. The adjustment terminal can be datasheeh to achieve very high ripple rejection ratios which are difficult to achieve with standard 3-terminal regulators.
National Semiconductor – datasheet pdf
Opto-isolator wikipedialookup. Solid tantalum capacitors can be used on the voltage output to improve the ripple rejection of the voltage regulator.
This publication supersedes and replaces all information previously supplied. The bypass capacitor on the adjustment terminal can discharge through a low current junction. Schmitt trigger wikipedialookup. Created 28 July