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双路、USB开关,带有故障屏蔽

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) 600
Current Limit (mA) (max) 600
# Power Switches 2
USB Yes
Fault Indicator Yes
Current Limit Accuracy (%) 33
Current Limit Set By Preset
RON (Ω) (typ) 0.075
VSUPPLY (V) (min) 4
VSUPPLY (V) (max) 5.5
Oper. Temp. (°C) -40 to +85
Package/Pins UMAX/10
Budgetary
Price (See Notes)
1.08
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简化框图

技术文档

数据资料 双路、USB开关,带有故障屏蔽 Nov 01, 2000

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参量

Parametric specs for Current Limit and USB Power Switches
Current Limit (mA) (min) 600
Current Limit (mA) (max) 600
# Power Switches 2
USB Yes
Fault Indicator Yes
Current Limit Accuracy (%) 33
Current Limit Set By Preset
RON (Ω) (typ) 0.075
VSUPPLY (V) (min) 4
VSUPPLY (V) (max) 5.5
Oper. Temp. (°C) -40 to +85
Package/Pins UMAX/10
Budgetary
Price (See Notes)
1.08

主要特征

  • Dual USB Switch in Tiny 10-Pin µMAX Package
  • Guaranteed 500mA Load per Channel
  • Built-In 20ms Fault Blanking
  • Compliant to USB Specifications
  • +4.0V to +5.5V Input Voltage Range
  • 45µA Quiescent Current
  • 3µA Shutdown Current
  • Independent Shutdown Control
  • Independent active-low FAULT Indicator Outputs
  • Thermal-Overload Protection

应用/用途

  • 计算机:台式机、工作站和服务器
  • 坞站
  • 笔记本电脑
  • PDA与掌上电脑
  • USB集线器
  • USB端口

描述

The MAX1812 is a dual current-limited switch specifically made for USB applications. Each channel is guaranteed to supply 500mA and meets USB specifications. The MAX1812's low quiescent supply current (45µA) and shutdown current (3µA) conserve battery power in portable applications.

The MAX1812 has multiple safety features to ensure that the USB port is protected. Built-in thermal-overload protection limits power dissipation and junction temperature. The device also has accurate internal current-limiting circuitry to protect the input supply against both overload and short-circuit conditions. Independent fault signals (active-low FAULTA and active-low FAULTB) notify the microprocessor when a thermal-overload, current limit, undervoltage lockout, or short-circuit fault occurs. A 20ms fault-blanking feature enables the circuit to ignore momentary faults, such as those caused when hot-swapping a capacitive load, thereby preventing false alarms to the host system.

The MAX1812 is available in a space-saving 10-pin µMAX package. For single versions of this device, refer to the MAX1693, MAX1694, and MAX1607 data sheets.

简化框图

MAX1812:典型工作电路 MAX1812:典型工作电路 Zoom icon

技术文档

数据资料 双路、USB开关,带有故障屏蔽 Nov 01, 2000

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

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