Programmable, 4A, USB, Current-Limited Switches with Autoreset and Fault Blanking

Smallest Programmable, 4A, Current-Limited USB Switch with Autoreset and Fault Blanking Half the Size of Competitors

Please check latest availability status for a specific part variant.


The MAX1562/MAX1562H/MAX1563 single current-limited switches provide up to 4A to power up to eight USB ports. They operate from a 4V to 5.5V input supply and consume only 40µA of quiescent current when operating and only 3µA in shutdown.

The MAX1562/MAX1562H/MAX1563s' autoreset feature latches the switch off if the output is shorted, thereby saving system power. When the short is removed, the switch is reactivated. A fault-blanking feature enables the circuit to ignore momentary faults, such as those caused when hot swapping a capacitive load, preventing false alarms to the host system. Fault blanking also prevents fault signals from being issued when the device powers up the load.

The MAX1562/MAX1562H/MAX1563 provide several safety features to protect the USB port. Built-in thermal-overload protection turns off the switch when the die temperature exceeds +160°C. Accurate internal current-limiting circuitry protects the input supply against both overload and short-circuit conditions. An open-drain fault signal (FAULT) notifies the microprocessor when a thermal-overload, current-limit, undervoltage lockout (UVLO), or short-circuit fault occurs.

The MAX1562 has an active-low ON, and the MAX1562H has an active-high ON enable input. The MAX1563 has a selectable active-high or active-low, logic-controlled enable. The current limit is programmed from 1A to 4A using a resistor.

The MAX1562/MAX1562H are available in 8-pin SO packages and are pin-compatible upgrades to the MIC2545A/MIC2549A. The MAX1563 provides the same features and higher current performance in a smaller 12-pin (4mm x 4mm) Thin QFN package. These devices operate over an extended temperature range (-40°C to +85°C). An evaluation kit is available to speed designs.
MAX1562, MAX1562H, MAX1563: Typical Operating Circuit MAX1562, MAX1562H, MAX1563: Typical Operating Circuit Enlarge+

Key Features

  • Programmable Current Limit (1A to 4A) with Resistor
  • Autoreset Feature Saves System Power
  • 20ms Fault-Blanking Circuitry
  • Active-High/Low Control Logic
  • Fault-Indicator Output
  • Thermal-Overload Protection
  • Smaller 4mm x 4mm Thin QFN Package (MAX1563)
  • 3µA Shutdown Current


  • Desktop Computers
  • Docking Stations
  • Notebook Computers
  • PDAs and Palmtop Computers
  • 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.
(min)(max)(typ)(min)(max)(See Notes)
MAX1562 Yes110004000Yes20Resistor10.02645.5-40 to +85
SOIC (N)/8
$1.16 @1k
$1.10 @1k
$1.26 @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.

MAX1563EVKIT: Evaluation Kit for the MAX1562, MAX1562H, MAX1563
Product Reliability Reports: MAX1563.pdf 
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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