Static Power Dissipation

P = Vdd × Ileakage

Quick answer

This calculator solves P = Vdd × Ileakage for Static Power. With Supply Voltage 12 V, Leakage Current 50 µA, the result is 0.6 mW. It solves in 3 directions, so you can enter the values you have and get the one you need.

Calculator

Static Power (mW)
—

Formula

P = Vdd × Ileakage

Description

Static power dissipation in CMOS circuits is caused by leakage currents that flow even when transistors are not switching. Sub-threshold leakage increases exponentially as threshold voltages are reduced in advanced process nodes. Gate oxide tunneling current also contributes in very thin oxide processes. For modern processors at 7nm and below, static power can account for 30-50% of total power consumption. Low-power designs use power gating, multi-threshold transistors, and body biasing to manage leakage.

Variables

  • P — Static power dissipation (W)
  • Vdd — Supply voltage (V)
  • Ileakage — Total leakage current (A)

Practical Notes

Leakage current roughly doubles for every 10°C increase in temperature, creating a thermal runaway risk if not managed. Sleep and deep-sleep modes in microcontrollers reduce leakage by powering down unused sections. Typical MCU sleep currents range from nanoamps to microamps depending on what peripherals remain active.

Symbols and units

Symbol Meaning Default unit Accepted units
P Static Power mW µW, mW, W, kW
Vdd Supply Voltage V pV, nV, µV, mV, V, kV
I Leakage Current µA pA, nA, µA, mA, A, kA

Step by step

  1. 1. What you know: Supply Voltage 12 V, Leakage Current 50 µA
  2. 2. The relation: P = Vdd × Ileakage
  3. 3. Substitute: Vdd = 12 V, I = 50 µA
  4. 4. Result: Static Power = 0.6 mW

Worked examples

Minimum range

Given: Supply Voltage 0.33 V, Leakage Current 100 nA

Result: Static Power = 0.033 µW

Low range

Given: Supply Voltage 3.3 V, Leakage Current 1 µA

Result: Static Power = 3.3 µW

Typical

Given: Supply Voltage 12 V, Leakage Current 50 µA

Result: Static Power = 0.6 mW

High range

Given: Supply Voltage 0.23 kV, Leakage Current 0.5 mA

Result: Static Power = 115 mW

Maximum range

Given: Supply Voltage 2.3 kV, Leakage Current 5 mA

Result: Static Power = 11.5 W

Solving for each variable

Solve for Static Power

Supply Voltage 0.33 V, Leakage Current 100 nA → 0.033 µW

Solve for Supply Voltage

Static Power 100 µW, Leakage Current 100 nA → 1 kV

Solve for Leakage Current

Static Power 100 µW, Supply Voltage 0.33 V → 0.303 mA

How Static Power changes with Supply Voltage

Supply Voltage (input) Static Power (result)
1.2 V 60 µW
3 V 150 µW
6 V 0.3 mW
9 V 0.45 mW
12 V 0.6 mW
18 V 0.9 mW
24 V 1.2 mW
48 V 2.4 mW
84 V 4.2 mW
120 V 6 mW

The same result in other units

Unit Value
µW 600
mW 0.6
W 0.0006

Embed this calculator

Paste this into any page. It keeps working when this page updates, and credits the source.

<iframe src="https://vbatpower.com/embed/digital-static-power/" width="100%" height="460" style="border:1px solid #1f2a37;border-radius:12px" loading="lazy" title="Static Power Dissipation"></iframe>
<p><a href="https://vbatpower.com/formulas/digital-static-power/">Static Power Dissipation</a> Calculator by vbatpower.com</p>

Frequently asked questions

How do you calculate Static Power Dissipation?

Use P = Vdd × Ileakage. With Supply Voltage 12 V, Leakage Current 50 µA, Static Power works out to 0.6 mW.

What is the formula for Static Power Dissipation?

The formula is P = Vdd × Ileakage. Static power dissipation in CMOS circuits is caused by leakage currents that flow even when transistors are not switching.

How do you find Supply Voltage when you know the other values?

Rearrange for Supply Voltage: with Static Power 100 µW, Leakage Current 100 nA, Supply Voltage is 1 kV.

How do you find Leakage Current when you know the other values?

Rearrange for Leakage Current: with Static Power 100 µW, Supply Voltage 0.33 V, Leakage Current is 0.303 mA.

What units does Static Power Dissipation use?

Static Power is shown in µW, mW, W. Values are held in SI base units internally, so you can mix prefixes without converting by hand.

Related Concepts

All Digital Logic formulas →
CMOS Dynamic Power Rise Time to Bandwidth Setup Time Margin Static Power Dissipation Clock Skew Timing Margin Logic Noise Margin Digital Fanout Pull-Up Resistor for Logic

Need more features?

Save calculations, import telemetry data, simulate battery discharge, and collaborate with your team.

Try the App