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 is not a LDO low-dropout regulatoras the typical dropout voltage is around 2 volts. Home Questions Tags Users Unanswered. An LDO might have a dropout voltage of 0.
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All linear regulators have a minimum dropout voltageor difference. If you have an input voltage of 20V the same 1A will be drawn from that 20V. But since there’s this voltage drop the input voltage has to be higher than the output voltage.
CT Datasheet – MCCT –
Even though the typical dropout voltage is 2 volts, you should use the maximum value in your design. So the 20V delivers 20W, while the load only consumes 12W.
Email Required, but never shown. How does it go from datashwet Maximum dropout voltage to a minimum input voltage? How much higher depends on the type of regulator. Dean 4, 22 57 Since the output is 12 volts, you add the two together to get a minimum input of Post as a guest Name. A note on dissipation: 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.
This is a snapshot of page 8: So if you have a 12W load it will draw 1A from the regulator.
7812CT Datasheet – 12V, Voltage Regulator
The is a non-LDO linear regulator, which means it needs a higher input voltage. The maximum dropout voltage Vd is 2. They are like a variable series resistor between input and output, causing a voltage drop across the daasheet. 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.
CT Datasheet, PDF – Alldatasheet
Linear regulators are different. From what i understand then from your answer The input voltage must be above the output. Sign up or log in Sign up using Google. On page 6 of the datasheet, the maximum dropout voltage Vd is listed as 2.
That means that when your datsheet consumes 10W the switcher will only dissipate 1W. So you won’t find a parameter “minimum input voltage”, but it is mentioned as a condition for proper operation within certain limits. If so, what is the current like that it outputs? Sign up using Email and Password.
The difference of 8W will be dissipated in the regulator. Voltage regulators basically 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. I’ve seen LDOs with a dropout voltage of 50 mV.
Therefore it’s best to keep the input voltage just above the minimum to prevent the regulator to become overheated. The datasheet does say how much it needs, but you may have to look for it.