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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7812CT Datasheet – 12V, Voltage Regulator

The datasheet does say how much it needs, but you may have to look for it. Home Questions Tags Users Unanswered. If you have an input voltage of 20V the same 1A will be drawn from that 20V.

Since the output is 12 volts, you add the two together to get a minimum input of This is a snapshot of page 8: The difference of 8W will dqtasheet dissipated in the regulator. 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 you won’t find a parameter “minimum input voltage”, datzsheet it is mentioned as a condition for proper operation within certain limits.

So the 20V delivers 20W, while the load only datahseet 12W.

7812 12V 1A Voltage Regulator

Email Required, but never shown. A note on dissipation: The maximum dropout voltage Vd is 2. This is a snapshot of page If so, what is the current like that it outputs?

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Even though the typical dropout voltage is 2 volts, you should use the maximum value in your design. Sign up using Facebook. 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.

The input voltage must be above the output. How does it go from a Maximum dropout voltage to a minimum input voltage? The is a non-LDO linear regulator, which means it needs a higher input voltage. On the datasheet it doesn’t mention an input voltage. Peter Mortensen 1, 3 14 Voltage regulators basically can be divided in two big groups: The is dayasheet a LDO low-dropout regulatoras the typical dropout voltage is around 2 volts.

That means that when your load consumes 10W the switcher will only dissipate 1W.

On page 6 of the datasheet, the maximum dropout voltage Vd is listed as 2. Dean 4, 22 57 The current to your load flows through the regulator and is the same current as will be drawn from the input voltage.

CT Datasheet, PDF – Alldatasheet

From what i understand then from your answer Post as a guest Name. 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. How much higher depends on the type of regulator. Therefore it’s best to keep the input voltage just above the minimum to prevent the regulator to become overheated.

All 7812t regulators have a minimum dropout voltageor difference. They are like a variable series resistor between input and output, causing a voltage drop across the regulator.

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

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By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. But since there’s this voltage drop the input voltage has to be higher than the output voltage.

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. Linear regulators are different.

I’ve seen LDOs with a dropout voltage of 50 mV. 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 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.

By clicking “Post Your Answer”, you acknowledge that you have read our datashset terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

MCCT Datasheet pdf – 3-Terminal 1A Positive Voltage Regulator – Fairchild Semiconductor

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. An LDO might have a dropout voltage of 0. Sign up using Email and Password.