Reverse blocking load switch suits consumer applications

March 18, 2015 // By Graham Prophet
Semtech’s SC33020H Load Switch platform occupies a 0.9 x 0.9, 4-bump Chip Scale Package (CSP) with on-resistance of 32mΩ. It provides power rail control for up to 2A with reverse current blocking protection for both portable and non-portable devices, including wearables and action video cameras.

This reverse blocking load switch gives designers effective power rail control and protection and enhances system performance due to the ultra-low on-resistance, Semtech says. The switch accepts 1.6V to 5.5V supply input rail and whenever the output voltage goes higher than the input rail the switch blocks current from flowing in reverse direction to protect sensitive upstream circuitry or to prevent excessive power leakage loss in application standby states. The reverse blocking feature is present at all times regardless of the switch ON/OFF state. The Load Switch is ESD-hardened to greater than 4kV for robust circuit protection.

SC33020H is priced at $0.38 (5000).