MAX1693, MAX1693H

USB Current-Limited Switches with Fault Blanking

Single, USB Current Limited Switch with Fault Blanking in a µMAX Package

Please check latest availability status for a specific part variant.


The MAX1693/(MAX1693H)/MAX1694 are current-limited, 60mΩ switches with built-in fault blanking. Their accurate preset current limit of 0.7A to 1.0A makes them ideally suited for USB applications. Their low quiescent supply current (14µA) and shutdown current (1µA) conserve battery power in portable applications. The MAX1693/(MAX1693H)/MAX1694 operate with inputs from +2.7V to +5.5V, making them ideal for both +3V and +5V systems.

A fault signal notifies the microprocessor that the internal current limit has been reached. A 10ms fault-blanking feature allows momentary faults (such as those caused when hot-swapping into a capacitive load) to be ignored, thus preventing false alarms to the host system. This fault blanking also prevents a fault signal from being issued when the device is powering up.

In the MAX1693/(MAX1693H), an output overcurrent condition causes the switch to current limit at 0.7A to 1.0A and active-low FAULT to go low after the 10ms blanking period. When the overcurrent condition is removed, active-low FAULT returns to its high-impedance state. In the MAX1694, any overcurrent longer than 10ms will latch the switch open and set active-low FAULT low. The latch is cleared by cycling the active-low ON input or by powering up the device again. This feature saves power by preventing the device from thermally cycling on and off in case of a persistent short-circuit condition.

The MAX1693/(MAX1693H)/MAX1694 have several safety features to ensure that the USB port is protected. Built-in thermal-overload protection limits power dissipation and junction temperatures. Both devices have accurate internal current-limiting circuitry to protect the input supply against overload. They are available in space-saving 10-pin µMAX® packages.
MAX1693, MAX1693H, MAX1694: Typical Operating Circuit MAX1693, MAX1693H, MAX1694: Typical Operating Circuit Enlarge+

Key Features

  • Accurate Current Limit (0.7A min, 1.0A max)
  • Guaranteed 0.75A Short-Circuit Protection
  • 10ms Internal Fault-Blanking Timeout
  • No Fault Signal During Power-Up
  • Latched active-low FAULT Output Turns Off Power Switch (MAX1694)
  • Thermal Shutdown Protection
  • +2.7V to +5.5V Supply Range
  • 14µA Supply Current
  • Small 10-Pin µMAX Package


  • Battery Chargers
  • Docking Stations
  • Hot Plug-In Power Supplies
  • Notebook Computers
  • Portable Equipment
  • USB Ports and Hubs

See parametric specs for Current Limit and USB Power Switches (80)

Part NumberUSBPower SwitchesCurrent Limit
Current Limit
Fault IndicatorCurrent Limit Accuracy
Current Limit Set ByLowest Adj. Setting
Oper. Temp.
minmaxtypminmaxSee Notes
MAX1693 Yes17001000Yes18Preset0. to +85
$0.83 @1k
$0.79 @1k
$0.83 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
Product Reliability Reports: MAX1693.pdf 
Request Reliability Report for: MAX1693H 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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