Top

Triple 1.2A USB Switch in 4mm x 4mm Thin QFN

Product Details

Key Features

View Less

Simplified Block Diagram

Technical Docs

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 .

Parameters

Parametric specs for Current Limit and USB Power Switches
Current Limit (mA) (min) 490
Current Limit (mA) (max) 1200
# Power Switches 3
USB Yes
Fault Indicator Yes
Current Limit Accuracy (%) 12.5
Current Limit Set By Resistor
Lowest Adj. Setting (A) 0.4
RON (Ω) (typ) 0.06
VSUPPLY (V) (min) 2.7
VSUPPLY (V) (max) 5.5
Oper. Temp. (°C) -40 to +85
Package/Pins TQFN/16
Budgetary
Price (See Notes)
1.9

Key Features

  • Tiny 16-Pin 4mm x 4mm Thin QFN Package
  • Reverse-Current Blocking
  • Programmable Current Limit
  • Auto-Restart when Fault Is Removed
  • 12% Accurate Current Limit
  • Up to 1.2A Load Current for Each Output
  • Thermal-Overload Protection
  • Built-In 20ms Fault Blanking
  • Compliant with All USB Specifications
  • 2.7V to 5.5V Input Supply Range
  • Independent Fault Indicator Outputs
  • Active-High/Active-Low Select Pin
  • ±15kV ESD Protection (with Caps)

Applications/Uses

  • Desktop Computers
  • Docking Stations
  • Notebook Computers
  • USB Hubs
  • USB Ports

Description

The MAX1564 triple, current-limited USB switch comes in a space-saving, 16-pin, 4mm x 4mm thin QFN package. Each channel meets all IEC specifications for USB ports. The device is capable of supplying up to 1.2A from each output. The MAX1564 has multiple protection features, including thermal shutdown to limit junction temperature in case of a prolonged short or overload condition. Reverse-current protection circuitry blocks current flow from output to input regardless of the switch state. The IC has accurate, user-programmable current-limiting circuitry to protect the input supply against overload.

Each output of the MAX1564 has short-circuit protection that latches off the switch when the output is shorted for more than 20ms, thereby saving system power. Auto-restart then tests the shorted output with a 25mA current to determine when the short is removed, then automatically restarts the output. Independent open-drain fault signals notify the microprocessor that the internal current limit has been reached. A 20ms fault-blanking feature allows momentary faults to be ignored, such as those caused when hot-swapping into a capacitive load. This feature helps avoid issuing false alarms to the host system. Blanking also suppresses errant fault signals when the device is powering up.

Simplified Block Diagram

MAX1564: Typical Application Circuit MAX1564: Typical Application Circuit Zoom icon

Technical Docs

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 .