This document introduces the MIC2027/2077 quad USB power distribution switch, which features overcurrent protection and thermal shutdown, and has an integrated soft-start circuit to minimize inrush current in applications with highly capacitive loads. The switch also provides a fault status output signal to indicate overcurrent and thermal shutdown conditions.
The MIC2027 and MIC2077 are quad high-side MOSFET switches optimized for general-purpose power distribution requiring circuit protection. They are internally current limited and have thermal shutdown that protects the device and load. The MIC2077 offers 'smart' thermal shutdown that reduces current consumption in fault modes, while the MIC2027 latches off until the faulty load is removed. Both devices employ soft-start circuitry to minimize inrush current in applications with highly capacitive loads.
| On-resistance per channel | 140mΩ maximum |
|---|---|
| Operating voltage range | 2.7V to 5.5V |
| Continuous current per channel | 500mA minimum |
| Supply current (switch off) | 1.5 µA to 10 µA |
| Supply current (switch on) | 200 µA to 320 µA |
| Short-circuit output current | 0.5 A to 1.25 A |
| Overcurrent flag response delay | 1.5 ms to 37 ms |
The devices operate with a supply voltage range of 2.7V to 5.5V.
The MIC2077 offers 'smart' thermal shutdown that reduces current consumption in fault modes, whereas the MIC2027 latches off until the load is removed.
The maximum on-resistance per channel is 140mΩ.