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 The adjustment terminal can be bypassed to achieve very datasheeet ripple rejection ratios which are difficult to achieve with standard 3-terminal regulators.
LM Datasheet and Product Info | Analog Devices
Schmitt trigger wikipedialookup. Variable-frequency drive wikipedialookup. Although the surge is very short in duration, there is enough energy to damage parts of the regulator IC. Where greater output current is required, the LM series regulators are suitable up to datssheet and the LM series voltage regulators for up to 5A of output.
A unique feature of the LM family is time-dependent current limiting. You don’t want to use too high an input voltage as the excess will need to be dissipated as heat through the regulator.
This eliminates line drops from appearing effectively in series with the reference and degrading regulation.
Ohm’s law wikipedialookup. This bypass capacitor prevents ripple form being amplified as the output voltage is increased.
Current source wikipedialookup. Control system wikipedialookup. The bypass capacitor on the adjustment terminal can discharge through a low current junction. Regulation is measured at constant junction temperature. Capacitor wikipedialookup. This publication supersedes and replaces all information previously supplied. Although the LM is stable with no output capacitors, like any feedback circuit, certain values of external capacitance can cause excessive ringing.
The LM family is supplied in a standard 3-lead transistor package. To do this, all quiescent operating current is returned to the output establishing a minimum load current requirement. Plan to be about 3V about the desired output voltage.
Alternating current wikipedialookup. Buck converter wikipedialookup. The adjustment terminal of the regulator can be bypassed to achieve very high ripple rejection. For example, a 15V regulator with 0.
National Semiconductor – datasheet pdf
Overload protection remains functional even if the adjustment pin is accidentally disconnected. This is not true of other types of positive regulators.
No protection diodes are required for output voltages of less than 25V or greater than 10 uF capacitance. 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. Under sustained loading conditions, the current limit decreases to a safe value protecting the regulator.
Regulator with Line Resistance in Output Lead. 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.
Islanding wikipedialookup. Solid tantalum capacitors have low impedance even at high frequencies. Two-port network wikipedialookup. Integrating ADC wikipedialookup. See the voltage regulator datasheets above for specific details regarding the dropout voltage and heatsink requirements. Voltage regulator wikipedialookup. Tube sound wikipedialookup.
The dropout voltage of the IC regulator is about 1. 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. The adjustment terminal can be bypassed to ground on the LM to improve ripple rejection. An optional output capacitor can be added to improve transient response. Changes in output voltage due to heating effects are taken into account separately by thermal rejection.