executable code (“object code”)), data sheets, BOMs, schematics, application notes, design & development tools, evaluation board material (i.e. BOM, Gerber, . LM LM – 3-Terminal Negative Regulator, Package: to , Pin Nb=3. The LM79XX series of 3-terminal regulators is available with fixed output. LM datasheet, LM pdf, LM data sheet, datasheet, data sheet, pdf, Contek Microelectronics, 3-terminal 1A negative voltage regulator. Output.

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LM7905 Datasheet

This 7 Watts will be dissipated as heat. Brief Description on Voltage Regulator Voltage regulators are very common in electronic circuits. Although the datasheet does not specify or call for any minimum datasheef, it also does not specify the performance at no load.

My mistake must be simple, but I can’t spot it. The output regulation is specified for a current change from 5 mA to 1 A. Depending on the construction of the model for the regulator, it is possible that it needs a minimum load. In many cases where an Op-Amp is working in dual mode power supply a negative voltage will be regulated by these 79XX ICs.

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Message 1 of 5. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.

So Multisim cannot simulate the output of a garden variety, ultra common, component like the LM I swapped the LM for another -5V regulator, the UPC, which gave the correct output but failed after a few seconds. The input capacitor 2. Thanks Lynn I tried that with a 1k load and that resulted in an output voltage of Voltage regulators are very common in electronic circuits.

Screen capture is attached. Message 2 of 5. So I went back to the LM but that still resulted in the incorrect output. This is a typical application circuit of the IC. Complete Technical Details can be found at the LM voltage regulator datasheet given at the end of this page.

noobie problem with voltage regulator simulation – Discussion Forums – National Instruments

The output current of this IC can go up to 1. TL — Programmable Reference Voltage. The maximum value is mV. Negative voltage regulators are mainly used in Op-Amp and other circuits where a negative supply voltage is needed.


Multisim and Ultiboard

If anyone has suggestions I would be most gratefull. The convergence assistant suggest to switch the integration to the Gear algorithm, which resulted in a lm790 and correct output.

We just need two capacitors of vale 2. Most Active Software Boards: Why do we need Negative Voltage Regulators?

In our case the IC is an negative 5V regulator, meaning it provides -5V as output. Message 4 of 5.

So our will provide a -5V output voltage. Message 3 of 5. These capacitors should be placed close to the terminals ln7905 them to work effectively.

Multisim Voltage reg simulation. Message 5 of 5. They provide a constant output voltage for a varied input voltage. Also they should be of ceramic type, since ceramic capacitors are faster than electrolytic. Submitted by admin on 10 June Perhaps changes to other options in the “Custom Analysis Options” datashdet will improve the convergence. Try putting a load resistor from each output to ground.