MAX1562

PRODUCTION

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

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Overview

  • 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

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.

Applications

  • Desktop Computers
  • Docking Stations
  • Notebook Computers
  • PDAs and Palmtop Computers
  • USB Ports and Hubs

MAX1562
Programmable, 4A, USB, Current-Limited Switches with Autoreset and Fault Blanking
MAX1562, MAX1562H, MAX1563: Typical Operating Circuit
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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Protection Switches & Controllers 3
MAX1940 PRODUCTION Triple USB Switch with Autoreset and Fault Blanking
MAX1823 PRODUCTION Dual USB Switch with Fault Blanking and Autoreset
MAX1946 PRODUCTION Single USB Switch with Autoreset and Fault Blanking in Tiny TDFN
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Evaluation Kits

MAX1563EVKIT

Evaluation Kit for the MAX1562, MAX1562H, MAX1563

Features and Benefits

  • 4V to 5.5V Single-Supply Operation
  • On-Board Shutdown Control
  • Evaluates Both MAX1563 (Thin QFN) and MAX1562 (SO)
  • Fully Assembled and Tested Surface-Mount Board

Product Details

The MAX1563 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board that evaluates the MAX1563 (4mm x 4mm thin QFN) programmable 4A USB switch. The EV kit includes on-board shutdown control that can be set for active-high or active-low logic. The EV kit PC board also includes a separate layout to evaluate the MAX1562 3A 8-pin SO.

MAX1563EVKIT
Evaluation Kit for the MAX1562, MAX1562H, MAX1563

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