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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 datasheet does say how much it needs, but you may have to look for it. They are like a variable series resistor between input and output, causing a voltage drop across the regulator.

That means that when your load consumes 10W the switcher will only dissipate 1W. A is a linear regulator, and datashheet not step up the input voltage if the input is below the output for that you need a DC-DC boost regulator.

How much higher depends on the type 7812xt regulator. The input voltage must be above the output. If so, what is the current like that it outputs?

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

An LDO might have a datasheeg voltage of 0. Dean 4, 22 57 Therefore it’s best to keep the input voltage just above the minimum to prevent the regulator to become overheated. From what i understand then from your answer Sign up using Email and Password. On page 6 of the datasheet, the maximum dropout voltage Vd is listed as 2.


A note on dissipation: All linear regulators have a minimum dropout voltage vatasheet, or difference. Peter Mortensen 1, 3 14 But since there’s this voltage drop the input voltage has to be higher than the output voltage.

(PDF) 7812CT Datasheet download

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.

There are LDOs Low Drop-Out which still can regulate the output if the input is only a few hundreds of mV datashewt and there are even ultra low drop-out types which only need a few tens of mV. The current to your load flows through the regulator and is the same datasheer as will be drawn from the input voltage. Post as a guest Name.

This is a snapshot of page Home Questions Tags Users Unanswered. 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 7812c 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.

Even though the typical dropout voltage is 2 volts, you eatasheet use the maximum value in your design. 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.


Sign up using Facebook. So if you have a 12W load it will draw 1A from the regulator.

12V 1A Voltage Regulator | L | ST Microelectronics

So you won’t find a parameter “minimum input voltage”, but it is mentioned as a condition for proper operation within certain limits. Linear regulators are different. The is not a LDO low-dropout regulatoras the typical datasheef voltage is around 2 volts.

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. 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.

Post Your Answer Discard 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. So the 20V delivers 20W, while the load only consumes 12W.

If you have an input voltage of 20V the same 1A will be drawn from that 20V.