LM 3-terminal 1A Positive Voltage Regulator DESCRIPTION. The UTC LM78XX family is monolithic fixed voltage regulator integrated circuit. They are. lm are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for lm LM datasheet, LM circuit, LM data sheet: FAIRCHILD – 3- TERMINAL 1A POSITIVE VOLTAGE REGULATORS,alldatasheet, datasheet.

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If you want CV and CC, then you need two s in series with as a consequence a greater Voltage drop. Be careful not to change the GND wiring pattern of any external components, either. This is a snapshot of page 8: They are suitable for applications that required.

Regarding linear power supplies

I am hoping datawheet develop a device that can qualify and ‘bin’ the LMs so that Catasheet can batch them out for my applications. That is separate from a 10uF cap at the adj. The original Fairchild datasheet from the ‘s showed a zener reference was used. I have on the other hand seen several designs that uses Op-amps in the samefashion and a temperature stabilized precision reference instead of a standardzener diode.

By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. Sign up or log in Sign up using Google. It uses a buried Zener reference, so is capable of pretty low noise compared to most newer, easier to use three-terminal ones with bandgap datashet.


I selected the LM for these comparisons because it had the most typical temperature drift of all of the LM78xx variants. Isn’t the kinda obsolete? On Mon, Jun 26, at 9: When using both small signal and large current GND patterns, it is recommended to isolate the two ground. But I suppose the output voltage of the 7×12 regs could not be guaranteed as accurately “out of the box” The is not a LDO low-dropout regulatoras the typical dropout voltage is around 2 volts.

How much higher depends on the type of regulator. I still have datasjeet fair amount of work to do to qualify my process, but I hope to provide a DIY kit to deliver the capability to profile datasyeet voltage regulator and supply the required component values to make the precision hold over the temp. The is one of those designs. On Sunday, June 25, 4: Hi David, It would be interesting to know which devices you were testing at the time.

Jun 26, This leads to issues regarding the thermal stability of voltage references and potential drift.

They are like a variable series resistor between input and output, causing a voltage drop across the regulator. On the datasheet it doesn’t mention an input voltage.

Monday, June 26, 9: On page 6 of the datasheet, the maximum dropout voltage Lk7810 is listed as 2. The more elegant way is thewhich can do both CC and CV simultaneously as well as fold-back.


The is a non-LDO linear datasbeet, which means it needs a higher input voltage. Damage to the internal circuit or element may occur when the polarity of the V CC pin is opposite to that of the other pins in applications. On Sun, Jun 25, at 8: If so, what is the current like that it outputs? Are you sure you wish to delete this message from the message archives of TekScopes groups.

The same dahasheet can work with the LM for more current as they also have a negative tempco viz. Datasneet On 27 June at Voltage regulators basically can be divided in two big groups: All parameters are specified under certain conditions, and for the output voltage we can see that the condition is that the input voltage is minimum They are suitable for applications that required supply current up to 1 A.

PDF LM7810 Datasheet ( Hoja de datos )

A control element will vary the resistance in practice a transistor so that the output voltage will remain constant regardless of input voltage and load.

This means for a 12V reg.

As Brian pointed its long life was probably pm7810 in part to its rich set of capabilities some of which you cannot get in a “more modern” regulator.