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datashheet From the above it may look like you best make dwtasheet input voltage a lot higher than the 12V output, but that’s not true. Email Required, but never shown. Even though the typical dropout voltage is 2 volts, you should use the maximum value dtaasheet your design.
The maximum dropout voltage Vd is 2. This is a snapshot of page Sign up using Email and Password. Voltage regulators basically can be divided in two big groups: If you have an input voltage of 20V the same 1A will be drawn from that 20V.
On page 6 of the datasheet, the maximum dropout voltage Vd is listed as 2. How does it go from a Maximum dropout voltage to a minimum input voltage? Peter Mortensen 1, 3 14 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.
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So the 20V delivers 20W, while the load only consumes 12W.
If so, what is the current like that it outputs? 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.
The difference of 8W will be dissipated in the regulator. The is a non-LDO linear regulator, which means it needs a higher input voltage. The input voltage must be above the output.
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They are like a variable series resistor between input and output, causing a voltage drop across the regulator. Sign up or log in Sign up using Google. xatasheet
Linear regulators are different. A control element will vary the resistance in practice a transistor so that the datazheet voltage will remain constant regardless of input voltage and load. So if you have a 12W load it will draw 1A from the 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.
Dean 4, 22 57 But since there’s this voltage drop the input voltage has to be higher than the output voltage. From what i understand then from your answer The is not a LDO low-dropout regulatoras the typical dropout voltage is around 2 volts. How much higher depends on the type of regulator. Post as a guest Name. That means that when your load consumes 10W the switcher will only dissipate 1W.
This is a snapshot of page 8: Since the output is 12 volts, you add the two together to get a minimum input datasheey On the datasheet it doesn’t mention an input voltage.
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