限流型、高边P沟道开关，带有热关断

 

器件号	Replacement	Explanation

说明

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The MAX891L/MAX892L smart, low-voltage, P-channel, MOSFET power switches are intended for high-side load-switching applications. These switches operate with inputs from 2.7V to 5.5V, making them ideal for both 3V and 5V systems. Internal current-limiting circuitry protects the input supply against overload. Thermal-overload protection limits power dissipation and junction temperatures.

The MAX891L/MAX892L's maximum current limits are 500mA and 250mA, respectively. The current limit through the switch is programmed with a resistor from SET to ground. When the switch is on, the quiescent supply current is a low 13µA. When the switch is off, the quiescent current decreases to 0.1µA.

The MAX891L/MAX892L are available in 8-pin µMAX® packages.

MAX891L、MAX892L：典型工作电路 放大+

关键特性

• Ultra-Small µMAX Package-Only 1.11mm High
• 2.7V to 5.5V Input Range
• Programmable Current Limit
• Low 13µA Quiescent Current at V_IN = 3.3V, 0.1µA Switch Off
• Thermal Shutdown
• FAULT-bar Indicator Output
• On-Resistances:
• 0.12Ω (MAX891L)
• 0.25Ω (MAX892L)

应用

• 接入总线插槽
• PCMCIA槽
• 便携式设备