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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National Semiconductor – datasheet pdf
An input bypass capacitor is recommended. This is not true of other types of positive regulators. Stray voltage wikipedialookup. 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.
The LM family is supplied in a standard 3-lead transistor package. The device is more sensitive to the absence of input bypassing when adjustment or output capacitors are used datasgeet the above values will eliminate the possibility of problems. In general, the best type of capacitors to use are solid tantalum.
Thermal runaway wikipedialookup. Also included on the chip are thermal overload protection and safe area protection for the power transistor. An optional output capacitor can be added to improve transient response.
Specifications mentioned in this publication are subject to change without notice. The current limit circuitry allows peak currents of up to 12A to be drawn from the regulator for short periods of time. To determine the output voltage, enter values for the program R 1 and set R 2 resistors and lm3338k the “Calculate” button.
Created 28 July Islanding wikipedialookup. Opto-isolator wikipedialookup. Electrical ballast wikipedialookup. In the LM this discharge path is through a large junction that is able to sustain 25A surge with no problem. Buck converter wikipedialookup. The adjustment terminal of the regulator can be bypassed to achieve very high ripple rejection. No protection diodes are required for output voltages of less than 25V or greater than 10 uF capacitance. The dropout voltage of the IC regulator is about 1.
Although the surge is very short in duration, there is enough energy to damage parts of the regulator IC.
Tube sound wikipedialookup. Although the surge is short, there is enough energy to damage parts of the IC. Regulator with Line Resistance in Output Lead. Three-phase electric power wikipedialookup. 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. Alternating current wikipedialookup.
The adjustment terminal can be bypassed to achieve very high ripple rejection ratios which are difficult to achieve with standard 3-terminal regulators. Schmitt trigger wikipedialookup. Besides replacing fixed regulators or discrete designs, the LM is useful in a wide variety of other applications. 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. To do this, all quiescent operating current is returned to the output establishing a minimum load current requirement.
LMK Hoja de datos ( Datasheet PDF ) – 5A Positive Adjustable Voltage Regulator
An optional output capacitor can be added to improve transient response. The adjustment terminal can be bypassed to ground on the LM to improve ripple rejection. The ground of R2 can be returned near datasheeet ground of the load to provide remote ground sensing and improve load regulation. Even small capacitors can have a low enough internal series resistance to be able to deliver 20A spikes when shorted.
PDF LM338K Datasheet ( Hoja de datos )
Mains electricity wikipedialookup. 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.
Voltage optimisation wikipedialookup. See the voltage regulator datasheets above for specific details regarding the dropout voltage and heatsink requirements. Resistive opto-isolator wikipedialookup.
This eliminates line drops from appearing effectively in series with the reference and degrading regulation. A unique feature of the Catasheet family is time-dependent current limiting. Figure 3 shows an LM with protection diodes included for use with outputs greater than 25V and high values of output capacitance. Two-port network wikipedialookup.
If there is insufficient load on the output, the output will rise.