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LM25085 Switching Regulator Design Calculator

See our other Electronics Calculators.

This calculator computes the energy in a capacitor, given the voltage across it.

If you specify a load resistor it will also compute the time constant, or the time until the voltage drops to 37%, or charges to 63%.


Input:

Voltage across capacitor (V)
Capacitance (uF)
Load Resistance (Optional) (Ohms)

Result:

Energy (Joules)
Time Constant (seconds)

See our standard resistor calculator for a real world resistor value.

Equations:

E= V^2*C/2

TC= R*C

1/e = 36.8%

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