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LM LMA LM 3-Amp Adjustable Regulators. General Description. The LM series of adjustable 3-terminal positive voltage regulators is capable of. APPLICATION HINTS. In operation, the LM develops a nominal V reference voltage, V(ref), between the output and adjustment terminal. The reference. The LM is an adjustable 3-terminal positive voltage regulator capable of supplying in excess of A over an output voltage range of V to.

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An optional output capacitor can be added to improve transient response. Which it looks like a popular LM With connecting a dataaheet resistor between the adjust and output. 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.

LM / LM / LM Voltage Regulator Calculator and Circuits

However, other values such as or ohms can also be used for R 1. Leave lm35 Reply Cancel reply. We have many ways to make it. See the voltage regulator datasheets above for specific details regarding the dropout voltage and heatsink requirements.

You can buy at mouser.

To determine the output voltage, enter values for the program R 1 and set R 2 resistors and hit the “Calculate” button. We can set the output voltage with only two external resistors.


This site uses Akismet to reduce spam. 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.

Because it is the adjustable three terminal positive voltage regulator. Over and Under voltage protection of electrical appliances July 11, Simple Crystal oscillator Circuit using 74LS04 November 17, Transistor stereo bass booster September 15, No protection diodes are required for output voltages of less than 25V or greater than 10 uF capacitance.

You don’t want to use too high an input voltage as the excess will need to be dissipated as heat through the regulator. 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. Many electronics circuits and projects for learning in simple ways.

National Semiconductor

Last update 6 January If you want to try it. The LM is best for you. The adjustment terminal of the regulator can be bypassed to achieve very high ripple rejection. Created 28 July Although the surge is very short in duration, there is enough energy to damage parts of the regulator IC. A programmable output regulator. We use datashset 2 resistors to control the output voltage. You see LM circuit below. If you are looking for 3A adjustable power supply.


As in the LM pinout above. Plan to be about 3V about the desired output voltage. The LM may be boring for you. Since it has high current over 3A, we must mount the LM on the large heatsink.

Also, its pin output connects the heatsink surface. Because you like many circuits to make on your working. Learn how your comment data is processed.

National Semiconductor – datasheet pdf

Quote and Order boards in minutes on https: A precision current regulator. The LM voltage regulators can provide up to 1. For example A simple adjustable switching regulator. Basic to use LM We love it because easy to use.

This is an LM Datasheet.

Solid tantalum capacitors can be used on the voltage output to improve the ripple rejection of the voltage regulator. It looks much like the popular LM In addition, it uses internal current limiting, thermal shutdown, and safe mode. Please update your bookmarks.