The LM78XX series of three terminal regulators is available with several fixed output voltages making them useful in a wide range of applications. One of these . CT NTE Equvilent NTE 12V positive voltage regulator. NTE Integrated Circuit 3 Terminal Positive Voltage Regulator 12V 1A. NTE Data Sheet. CT Datasheet, CT PDF, CT Data sheet, CT manual, CT pdf, CT, datenblatt, Electronics CT, alldatasheet, free, datasheet.

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The difference of 8W will be dissipated in the regulator. From 7821ct above it may look like you best make your input voltage a lot higher than the 12V output, but that’s not true. The current to your load flows through the regulator and is the same current as will be drawn from the input voltage.

(PDF) 7812CT Datasheet download

7812ctt So you won’t find a parameter “minimum input voltage”, but it is mentioned as a condition for proper operation within certain limits. So the 20V delivers 20W, while the load only consumes 12W. Therefore it’s best to keep the input voltage just above the minimum to prevent the regulator to become overheated.

Sign up using Email and Password. Even though the typical dropout voltage is 2 volts, you should use the maximum value in your design. By using our site, you acknowledge that you have read 77812ct understand our Cookie PolicyPrivacy Policyand our Terms of Service.


CT Datasheet PDF – National ->Texas Instruments

Peter Mortensen 1, 3 14 This is a snapshot of page 8: Dean 4, 22 57 Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read datasheer updated terms of serviceprivacy policy and cookie policyand datasheeet your continued use of the website is subject to these policies. 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 If so, what is the current like that it outputs?

Dataxheet does it go from a Maximum dropout voltage to a minimum input voltage? From what i understand then from your answer But since there’s this voltage drop the input voltage has to be higher than the output voltage. 8712ct 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. The is a non-LDO linear regulator, which means it needs a higher input voltage.

Voltage regulators basically can be divided in two big groups: Linear regulators are different. That means that when your load consumes 10W the switcher will only dissipate 1W.

A note on dissipation: If we look further we can see two values for line regulation; it appears that this is best if the input voltage is at least 16V. Since the output is 12 volts, you add the two together to get a minimum input of Sign up or log in Sign up using Google.


The datasheet does say how much it needs, but you may have to look for it. 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.

The input voltage must be above the output. Home Questions Tags Users Unanswered.

If you have an input voltage of 20V the same 1A will be drawn from that 20V. An LDO might have a dropout voltage of 0. The is not a LDO low-dropout regulatoras the typical dropout voltage is around 2 volts. There are LDOs Low Drop-Out which still can regulate the output if the input is only a few hundreds of mV higher and there are even ultra low drop-out types which only need a few tens of mV.

Post as a guest Name. Sign up using Facebook. So if you have a 12W load it will draw 1A from the regulator. They are like a variable series resistor between input and output, causing a voltage drop across the regulator.

On the datasheet it doesn’t dqtasheet an input voltage.