Quote:
Originally Posted by yash101
Also, using a linear voltage regulator at those currents would cause the magic smoke of death to puff out of the regulator. Powering my RasPi from an LDO gets the chip so hot, I have it connected to the aluminum chassey of the robot for a ginormous heat sink!
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Depending on the current draw of the controller, as well as the supply voltage of the battery, a low dropout regulator may be just fine. Basically what you need to remember is the difference in the battery voltage and supply voltage is just waste at the linear regulator.
If you have a 12V battery with a 5V linear regulator, drawing 700mA from it will cause it to act as a 4.9W space heater (gets hot very quickly).
If you have a 7.4V battery with a 5V linear regulator, drawing 50mA will only waste .12W, which is much more manageable from a power dissipation perspective.
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