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Dual USB Switch with Fault Blanking

Product Details

Key Features

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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)
1.15
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Simplified Block Diagram

Technical Docs

Data Sheet Dual USB Switch with Fault Blanking Nov 01, 2000

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Parameters

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)
1.15

Key Features

  • 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

Applications/Uses

  • Computers: Desktop, Workstation, Server
  • Docking Stations
  • Notebook Computers
  • PDAs and Palmtop Computers
  • USB Hubs
  • USB Ports

Description

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.

Simplified Block Diagram

MAX1812: Typical Operating Circuit MAX1812: Typical Operating Circuit Zoom icon

Technical Docs

Data Sheet Dual USB Switch with Fault Blanking Nov 01, 2000

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .