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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The bog standard regulators were by far the more temperature stable! A thermistor is involved.

Search Only Within This Topic. Monday, June 26, 9: The LM78xx has been around forever and I would guess it’s specs have not changed since it was introduced.

Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you datashewt read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. Maybe even process several LMs at once. Sign up or log in Sign up using Google. Which zener would that be in the schematic not the block diagram?

(PDF) LM7810 Datasheet download

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 datasheeet Damage to the internal circuit or element may occur when the polarity of the V CC pin is opposite to that of. Bruce On 27 June at Be careful not to change the GND l7810 pattern of any external components, either.

Are you sure you wish to delete this message from the message archives of TekScopes groups. So if you have a 12W load it will draw 1A from the regulator. Email Required, but never shown. Regarding linear power supplies ST electronics used to make an LM variant that appeared to have dataeheet noise than the standard and the schematic indicated that a bandgap reference was used.


Sign up using Email and Password. I’ve seen LDOs with a dropout voltage of 50 mV. Reason Report to Moderators I think this message isn’t appropriate for our Group.

LM (FCI) – LM Series 3-Terminal fixed Voltage Regulators | eet

On page 6 of the datasheet, the maximum dropout voltage Vd is listed as 2. How does it go from a Maximum dropout voltage to a minimum input voltage? All linear regulators have a minimum dropout voltageor difference. So the 20V delivers 20W, while the load only consumes 12W. On Sunday, June 25, 4: Some variants actually use a bandgap reference instead of a zener. Precision voltage references are somewhat “newer” and, presumably, they have improved with the introduction of newer products over time.

They are suitable for applications that required supply current up to 1 A. The maximum dropout voltage Vd is 2. Dennis Tillman W7PF toggle quoted message. A is a linear regulator, and does not step up the input voltage if the input is below the output for that you need a DC-DC boost regulator.

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. Home Questions Tags Users Unanswered. Of course, this is only valuable to DIY projects etc. 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.

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



Some designs are so well done that they are timeless. This means for a 12V reg. I prefer it to almost anything else for positive supplies up to mA, for low noise analog and digital circuits. Hi David, It would be interesting to know which devices you were testing at the time.

But I suppose the output voltage of the 7×12 regs could not be guaranteed as accurately “out of the box” Linear regulators are different. What was the part number? datashewt

It does take more parts to implement small regulators, so it depends on the application. From the above it may look like you best make your input voltage a lot higher than the 12V output, but that’s not true. The Group moderators are responsible for maintaining their community and can address these issues. The more elegant way is thewhich can do both CC and CV simultaneously as well as fold-back. As Brian pointed its long life was probably due in part to its rich set of capabilities some of which you cannot get in a “more modern” regulator.

From what i understand then from your answer By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. On Mon, Jun 26, at 9: Regards toggle quoted message. A note on dissipation: I say “finally” because it has been going strong since when I first used it.