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 maximum dropout voltage Vd is 2. 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 This is a snapshot of page Therefore it’s best to keep the input voltage just above the minimum to prevent the regulator to become overheated.

Linear regulators are different. On the datasheet it doesn’t mention an input voltage. Sign up or log in Sign up using Google. 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.

An LDO might have a dropout voltage of 0. But since there’s this datahseet drop the input voltage has to be higher than the output voltage.

From what i understand then from your answer The current to your load flows through the regulator and is the same current as will be drawn from the input voltage. On page 6 of the datasheet, the maximum dropout voltage Vd is listed as 2. Even though the typical dropout voltage is 2 datwsheet, you should use the maximum value in your design.

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

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. How much higher depends on the type of regulator. The is not a LDO low-dropout regulatoras the typical dropout voltage is around 2 volts.

Voltage regulators datasneet can be divided in two big groups: 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.

The datasheet does say how much it needs, but you may have to vatasheet for it. So the 20V delivers 20W, while the load only consumes 12W. They are like a variable series resistor between input dayasheet output, causing a voltage drop across the regulator.

Email Required, but never shown. A note on dissipation: Peter Mortensen 1, 3 14 Since the output is 12 volts, you add the two together to get a minimum input of 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.

Post as a guest Name. So you won’t find a parameter “minimum input voltage”, but it is mentioned as a condition for proper operation within certain limits. So if you have a 12W load it will draw 1A from the regulator.

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CT Datasheet – 12V, Voltage Regulator –

I’ve seen LDOs with a dropout voltage of 50 mV. Home Questions Tags Users Unanswered. 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.

If so, what is the current like that it outputs? 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.

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Dahasheet difference of 8W will be dissipated in the regulator. All linear regulators have a minimum dropout voltageor difference. 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.

This is a snapshot of page 8: Sign up using Email and Password. The input voltage must be above the output. Dean 4, 22 57 How does it go from a Maximum dropout voltage to a minimum input voltage?

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If you have an input voltage of 20V the same 1A will be drawn from that 20V. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The is a non-LDO linear regulator, which eatasheet it needs a higher input voltage.