RS Components 其他网络设备 限流开关 MAX890LESA+ 使用说明.pdfVIP

19-1146; Rev 4; 4/11 1.2A, Current-Limited, High-Side P-Channel Switch with Thermal Shutdown General Description Features M The MAX890L smart, low-voltage, P-channel, MOSFET ♦♦ +2.7V to +5.5V Input Range A X power switch is intended for high-side load-switching applications. This switch operates with inputs from ♦♦ Programmable Current Limit +2.7V to +5.5V, making it ideal for both +3V and +5V ♦♦ Low Quiescent Current 8 systems. Internal current-limiting circuitry protects the 10µA (typ) at VIN = +3.3V 9 input supply against overload. Thermal-overload pro- 0.1µA (typ) with Switch Off 0 L tection limits power dissipation and junction tempera- tures. ♦♦ Thermal Shutdown The MAX890L’s maximum current limit is 1.2A. The cur- ♦♦ FAULT Indicator Output rent limit through the switch is programmed with a resistor from SET to ground. The quiescent supply cur- ♦♦ 0.09Ω (typ) On-Resistance rent is a low 10µA. When the switch is off, the supply current decreases to 0.1µA. The MAX890L is available in an 8-pin SO package. Applications Ordering Information PCMCIA Slots