Ideambox
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TOOL IDB-ELE-004
DC-DC efficiency

Desktop only

Engineering tools are available only on desktop screens.

DC-DC efficiency

Efficiency, input power, output power, and losses. For bench-validating a buck/boost or sanity-checking a datasheet curve.

Power flow — W lost
Vin — W DC-DC η = — Vout — W loss
Typical η vs load curve measured point on a synthetic curve
100% 75% 50% 0% 0 — A Iout →
Engineering notes

Formula

  • Pin = Vin · Iin
  • Pout = Vout · Iout
  • η = Pout / Pin

Typical efficiencies

  • Synchronous buck: 90–96% at mid load.
  • Boost: 85–92%.
  • Linear regulator: Vout/Vin.
  • Below 70%: check switching freq, inductor, ripple.

Result

Live