High Current Switching

Analog switches are sometimes required to conduct appreciable amounts of current, either continuous, or instantaneous - such as charging or discharging a capacitor. For best reliability, it is recommended that instantaneous current be limited to less than 80mA peak and that average power over any 100 millisecond period be limited to ≤ I2 x RON (absolute maximum derated power- quiescent power). Note that RON increases at high current levels, which is characteristic of any FET switch. Switching elements may be connected in parallel to reduce RON.