MAX891L

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


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说明

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 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 VIN = 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

请查看具体的参数规格 Current Limit and USB Power Switches (80)


Part NumberPower SwitchesCurrent Limit
(mA)
Current Limit
(mA)
Fault IndicatorCurrent Limit Accuracy
(%)
Current Limit Set ByLowest Adj. Setting
(A)
RON
(Ω)
VSUPPLY
(V)
VSUPPLY
(V)
Oper. Temp.
(°C)
Package/PinsBudgetary
Price
minmaxtypminmaxSee Notes
MAX891L 1500500Yes15Resistor0.10.122.75.5-40 to +85
UMAX/8
$1.60 @1k
MAX892L 2502500.050.25
UMAX/8
$1.63 @1k

Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。
产品可靠性报告: MAX891L.pdf 
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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