78012 DATASHEET PDF

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The datasheet does say how much it needs, but you may have to look for it. 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. On the eatasheet it doesn’t mention an input voltage. Home Questions Tags Users Unanswered.

The is not a LDO low-dropout regulator datasgeet, as the typical dropout voltage is around 2 volts. The input voltage must be above the output.

The is a non-LDO linear regulator, which means it needs a higher input voltage. If you have an input voltage of 20V the same 1A will be drawn from that 20V. So you won’t find a parameter “minimum input voltage”, but it is mentioned as a condition for proper operation within certain limits. Peter Mortensen 1, 3 14 All linear regulators have a minimum dropout voltageor difference.

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An LDO might have a dropout voltage of 0. That means that when your load consumes 10W the switcher will only dissipate 1W. Sign up or log in Sign up using Google.

The current to your load flows through the regulator and is the same current as will be drawn from the input voltage. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Sign up using Email and Password. From what i understand then from your answer This is a snapshot of page Dean 4, 22 57 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.

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

Voltage regulators basically can be divided in two big groups: But since there’s this voltage drop the input voltage has to be higher than the output voltage. 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.

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They are like a variable series resistor between input and output, causing a voltage drop across the regulator. Linear regulators are different. If so, what is the current like that it outputs? This is a snapshot of page 8: How does it go from a Maximum dropout voltage to a minimum input voltage?

minimum input voltage? – Electrical Engineering Stack Exchange

The difference of 8W will be dissipated in the regulator. There are Datashest 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. Since the output is 12 volts, you add the two together to get a minimum input of I’ve seen LDOs with a dropout voltage of 50 mV.

How much datadheet depends on the type of regulator. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have xatasheet our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

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