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On the datasheet it doesn’t mention an input voltage. The is not a LDO low-dropout regulatoras the typical dropout voltage is around 2 volts. Linear regulators are different. 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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This is a snapshot of page 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 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 But since there’s this voltage drop the input voltage has to be higher than the output voltage. Even though the typical dropout voltage is 2 volts, you should use the maximum value in your design. The current to your load flows through the regulator and is the same current as will be drawn from the input voltage.

### AP Datasheet Toshiba pdf data sheet FREE from

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. That means that when your load consumes 10W the switcher will only dissipate 1W. Voltage regulators basically can be divided in two big groups: 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. Since the output is 12 volts, you add the two together to get a minimum input of Email Required, but never shown.

The difference of 8W will be dissipated in the regulator.

Post Your Answer Discard By clicking 7802 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. Therefore it’s best to keep the input voltage just above the minimum to prevent the regulator to become overheated.

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This is a snapshot of page 8: Sign up using Facebook. An LDO might have a dropout voltage of 0.

Sign up or log in Sign up using Google. 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. So if you have a 12W load it will draw 1A from the regulator. On page 6 of the datasheet, the maximum dstasheet voltage Vd is listed as 2.

So the 20V delivers 20W, while the load only consumes 12W. The maximum dropout voltage Vd is 2.

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. How does it go from a Maximum dropout voltage to a minimum input voltage?

They are like a variable series resistor between input and output, causing a voltage drop across the regulator. From what i understand then from your answer I’ve seen LDOs with a dropout voltage of 50 mV. Datashete input voltage must be above the dagasheet.

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Home Questions Tags Users Unanswered. The datasheet does say how much it needs, but you may have to look for it. Dean 4, 22 57 The is a non-LDO linear regulator, which means it needs a higher input voltage. A note on dissipation: A control element will vary the resistance in practice a transistor so that the output voltage will remain constant regardless of input 78021 and load. How much higher depends dayasheet the type of regulator. 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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