Better Regulated Power Supply With LT-1083CP

The most popular choice for regulated power supply are using 78xx series which simple yet considerably good. If want more advance to against the ripple, using LM317 is the best choice. The LM317 is also voltage regulator with the voltage output that can be adjust based on the need. They are both good regulator but very limited to the output ampere. Less than 1 ampere I believe. This low ampere is not a problem with small device such as pre-amplifier but you cannot going any further such as power amplifier. Of course you can add to the circuit a high ampere transistor to rise the current but it make the circuit more complicated. That is why this LT1083 will took the place for the high ampere regulated power supply IC.

I build this power supply for my testing purpose. With high ampere capable up to 7.5 ampere, LT-1083CP is superior for testing class AB and D amplifier and also car audio system. The components for this build is quite classy, they are Motorola Diode MUR4100, Nichicon FW, Muse, Wima, Brouns multi-turn pot, and Takman resistor. The board is using universal board and all connection are doing by point-to-point.

The schematic for this LT-1083CP is 100% same with LM317. Total working hours to finish this board assembled together is less than an hour.

I immediate test it with my 100VA Tamura transformer with secondary output 15 volt AC and adjust the regulated to 14.4 volt DC. With those condition, this LT1083 only deliver small heat. So far no extra heat-sink require especially to drive the class D amplifier.

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