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限流型、高边P沟道开关,带有热关断

低电阻p沟道开关,为系统和USB提供可调节的、精确的限流保护

产品详情

主要特征

应用/用途

Parametric specs for Current Limit and USB Power Switches
Current Limit (mA) (min) 500
Current Limit (mA) (max) 500
# Power Switches 1
Fault Indicator Yes
Current Limit Accuracy (%) 15
Current Limit Set By Resistor
Lowest Adj. Setting (A) 0.1
RON (Ω) (typ) 0.12
VSUPPLY (V) (min) 2.7
VSUPPLY (V) (max) 5.5
Oper. Temp. (°C) -40 to +85
Package/Pins UMAX/8
Budgetary
Price (See Notes)
1.7
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参量

Parametric specs for Current Limit and USB Power Switches
Current Limit (mA) (min) 500
Current Limit (mA) (max) 500
# Power Switches 1
Fault Indicator Yes
Current Limit Accuracy (%) 15
Current Limit Set By Resistor
Lowest Adj. Setting (A) 0.1
RON (Ω) (typ) 0.12
VSUPPLY (V) (min) 2.7
VSUPPLY (V) (max) 5.5
Oper. Temp. (°C) -40 to +85
Package/Pins UMAX/8
Budgetary
Price (See Notes)
1.7

主要特征

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

应用/用途

  • 接入总线插槽
  • PCMCIA槽
  • 便携式设备

描述

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.

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MAX891L、MAX892L:典型工作电路 MAX891L、MAX892L:典型工作电路 Zoom icon

技术文档

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在Maxim的知识库中搜索技术问题的答案

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Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心