Voltage stabilizer input/output current

Question

What is the relation between the input and output current of a generic efficient ( not just a zener diode) DC voltage stablizer ie: If the input voltage equals 15 V the stabilized voltage equals 12V and the output current equals 2A whats the input current of the stabilizer? Does the input current decrease with input voltage ?

Have a look on this question/answer. – Bence Kaulics Jun 13 '15 at 14:40 — Bence Kaulics, Jun 13 '15 at 14:40

score 2 · Accepted Answer · answered Jun 13 '15 at 15:38

2

For linear regulators (such as 78xx, LM317) the input current is equal to the output current, plus a little bit to power the regulation circuit.

For a switch mode regulator, the power input is equal to the power output plus a little for regulator inefficiency.

answered Jun 13 '15 at 15:38

Peter Bennett

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Short and sweet; +1. – EM Fields Jun 13 '15 at 18:22

Voltage stabilizer input/output current

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