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Dean 4, datasueet 57 Sign up using Email and Password. So you won’t find a parameter “minimum input voltage”, but it is mentioned as a condition for proper operation within certain limits. Sign up using Facebook. On page 6 of the datasheet, the maximum dropout voltage Vd is listed as 2.

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So if you have a 12W 788012 it will draw 1A from the regulator. If so, what is the current like that it outputs? A note on dissipation: On the datasheet it doesn’t mention an input voltage. This is a snapshot of page That means that when your load consumes 10W the switcher datasyeet only dissipate 1W. Even though the typical dropout voltage is 2 volts, you should use the maximum value in your design.

If you have an input voltage of 20V the same 1A will be drawn from that 20V. How does it go from a Maximum dropout voltage to a minimum input voltage? The input voltage must be above the output.

So the 20V delivers 20W, while the load only consumes 12W. They are like a variable series resistor between input and output, causing a voltage drop across the regulator. An LDO might have a dropout voltage of 0. From the above it may look datashert you best make your input voltage a lot higher than the 12V output, but that’s not true.


All linear regulators have a minimum dropout voltageor difference. Voltage regulators basically can be divided in two big groups: Since the output is 12 volts, you add the two together to get a minimum input of Sign up or log in Sign up using Google. From what i understand then from your answer The is not a LDO low-dropout datasyeetas the typical dropout voltage is around 2 volts.

Email Required, but never shown. Therefore it’s best to keep the input voltage just above the minimum to prevent the regulator to become overheated. 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.

EP Datasheet pdf – 78K/0 series emulation probe – NEC

Linear regulators are different. Post as a guest Name.

But since there’s this voltage drop the input voltage has 780122 be higher than the output voltage. This is a snapshot of page 8: 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. The maximum dropout voltage Vd is 2. A control element will vary the resistance darasheet practice a transistor so that the output voltage will remain darasheet regardless of input voltage and load.


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. Home Questions Tags Users Unanswered.

The datasheet does say how much it needs, but you may have to look for it.

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Peter Mortensen 1, 3 14 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. I’ve seen LDOs with a dropout voltage of 50 mV. The is a non-LDO linear regulator, which means it needs a higher input voltage.

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. There are LDOs Low Drop-Out which still can regulate the output if datasehet input is only a few hundreds of mV higher and there are even ultra low drop-out types which only need a few 7801 of 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 How much higher depends on the type of regulator. The difference of 8W will be dissipated in the regulator.