Linear Regulator Efficiency Rechner
Berechnen Sie linear voltage regulator efficiency und power wasted as heat.
Wirkungsgrad
41.7 %
Efficiency vs Input Voltage
Formel
## Linear Regulator Efficiency ### Formula **Efficiency = V_out / V_in x 100%** Linear regulators are simple and low-noise but waste power as heat. Efficiency depends only on the voltage ratio, not on current. A 12V-to-5V linear regulator is only 42% efficient.
Lösungsbeispiel
12 V input, 5 V output, 1 A load.
- 01Efficiency = 5 / 12 x 100 = 41.7%
- 02Power delivered = 5 x 1 = 5 W
- 03Power wasted = (12 - 5) x 1 = 7 W
Häufig Gestellte Fragen
When is a linear regulator appropriate?
When input-output voltage difference is small, load current is low, or noise requirements are strict (audio, precision ADCs).
What is dropout voltage?
The minimum V_in - V_out for regulation. Standard regulators need 2V; LDOs need as little as 0.1-0.3V.
LDO vs standard linear regulator?
LDO (Low Dropout) regulators work with smaller input-output differentials, improving efficiency when voltages are close.
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