ST890 1.2 A current limited high side power switch with thermal shutdown
The ST890 is a low voltage, P-channel MOSFET power switch designed for high side load switching applications. It operates with input voltages ranging from 2.7 V to 5.5 V, making it suitable for both 3 V and 5 V systems. The device features internal current limiting circuitry to protect the input supply against overload and thermal overload protection to limit power dissipation and junction temperatures.
| Operating voltage | 2.7 V to 5.5 V |
|---|---|
| Maximum continuous switching current | 1.5 A |
| ON resistance (typical at 4.5V) | 90 mQ |
| Operating ambient temperature range | -40 to +85 °C |
| Thermal shutdown threshold | 130 °C |
The device operates with inputs from 2.7 V to 5.5 V.
The current limit is programmed with a resistor connected from the SET pin to ground.