executable code (“object code”)), data sheets, BOMs, schematics, application notes, design & development tools, evaluation board material (i.e. BOM, Gerber, . 3-TERMINAL 1A NEGATIVE VOLTAGE REGULATORS. The LM79XX series of three-terminal negative regulator. are designed for a wide range of applications. LM datasheet, LM pdf, LM data sheet, datasheet, data sheet, pdf, Contek Microelectronics, 3-terminal 1A negative voltage regulator. Output.

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Submitted by admin on 10 June Complete Technical Details can be found at the LM voltage regulator datasheet given at the end of this page. Brief Description on Voltage Regulator Voltage regulators are very common in electronic circuits. In many cases where an Op-Amp is working in lk7905 mode power supply a negative voltage will be regulated by these 79XX ICs. Depending on the construction of the model for the regulator, it is possible that it needs a minimum load. My mistake must be simple, but I can’t spot it.

Thanks Lynn I tried that with a 1k load and that resulted in an output voltage of Perhaps changes to other options in the “Custom Analysis Options” dialog will improve the convergence. Message 4 of 5.


Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Although the datasheet does not specify or call for any minimum load, it also does not specify the performance at no load.

Voltage regulators are very common in electronic circuits. We just need two capacitors of vale 2. Multisim Voltage reg simulation. Message 1 of 5. The output current of this IC can go up to 1. These capacitors should be placed dxtasheet to the terminals for them to work effectively. The maximum value is mV.

LM Hoja de datos ( Datasheet PDF ) – LM79XX Series 3-Terminal Negative Regulators

They provide a constant output voltage for a varied input voltage. So I went back to the LM but that still resulted in the incorrect output. Screen capture is attached. So our will provide a -5V output voltage. Message 3 of 5. The input capacitor 2.

LM7905 Datasheet PDF

This is a typical application circuit of the IC. Also they should be of ceramic type, since ceramic capacitors are faster than electrolytic.


The convergence assistant suggest to switch the integration to the Gear algorithm, which resulted in a stable and correct output. Try putting a load resistor from each output to ground.

Multisim and Ultiboard

Most Active Software Boards: The output regulation is specified for a current change from 5 mA to 1 A. If anyone has suggestions I would be most gratefull.

I swapped the LM for another -5V regulator, the UPC, which gave the correct output but failed after a few seconds. TL — Programmable Reference Voltage. This 7 Watts will be dissipated as heat. In our case the IC is an negative 5V regulator, meaning it provides -5V as output.

Negative voltage regulators are mainly used in Op-Amp and other circuits where a negative supply voltage is needed. Message 5 of 5. Datashete Multisim cannot simulate the output of a garden variety, ultra common, component like the LM Message 2 of 5. Why do we need Negative Voltage Regulators?