Overvoltage Protector with Bidirectional Blocking and Surge Protection

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The KTS1675A over-voltage protection device features high current integrated N-Channel MOSFETs with an ultra-low IN to OUT on-resistance of 25mΩ (typical). Low-voltage systems on the output are protected from voltage supply faults up to +28V. An internal clamp on the input protects the device from surges up to ±100V.

An input voltage exceeding the over-voltage threshold causes the internal MOSFETs to turn off, preventing excessive voltage from damaging downstream devices.

The KTS1675A has a selectable internal fixed OVLO threshold preset to either 13V or 23.4V (typical) and also supports reverse bias blocking, preventing any voltage present at OUT pin feeding back into IN when the device is in the Off state.

The KTS1675A also features additional protection including enhanced ESD and thermal to protect against over-load conditions.

The device is available in a RoHS and Green compliant 20-bump, 0.4mm pitch, 2.22mm x 1.82mm WLCSP.


  • Wide Input voltage range: 3.0V to +28V
  • Integrated MOSFET switch 25mΩ typical
  • 5A Continuous Current
  • VP Select pin
    • Over-Voltage threshold trip 13V/23.4V
  • Fixed 5V Output from VSNS
  • Fast Over-Voltage response time 100ns
  • Low Quiescent Current: 160μA (typ.)
  • Integrated Protection
    • Thermal Shutdown
    • Under voltage protection (UVLO)
    • Soft-Start
    • OUT to IN Reverse Blocking
  • EN, VSNS, WRX and FLAG pins
  • Integrated Surge Protection up to +/-100V
  • Pb-free WLCSP 20-Bump, 0.4mm pitch
  • -40°C to +85°C Temperature Range


  • Smartphones and Tablets
  • Mobile Internet Devices
  • Peripherals

Packaging Information

Package Dimensions Bumps Package Code
WLCSP54-20 2.22mm x 1.82mm x 0.62mm 20 UT


Vin (min)  Vin (max)  ON Resistance Max Current (A) OVP Trip Point Package
3.0V 28V 25mΩ 5A 13V/23.4V WLCSP54-12

Technical Documentation

Description Documents Type
Package Outline DrawingWLCSP54-20 UT PODPDF


Part Number Marking Operating Temperature Package
Purchase Options
Buy from Digi-Key
Buy from Mouser