The KTS1693 overvoltage protection device features an ultra-low 9mΩ (typical) on-resistance high current integrated MOSFET which actively protects low-voltage systems from voltage supply faults up to +28VDC. An internal clamp protects the device from surges up to ±110V.

An input voltage exceeding the overvoltage threshold will cause the internal MOSFET to turn off, preventing excessive voltage from damaging downstream devices.

When the OVLO pin input is set below the external OVLO select voltage, the KTS1693 automatically chooses the internal fixed OVLO threshold, preset to 5.95V (typical). The overvoltage protection threshold is adjustable with an optional resistor divider to a voltage between 4V and 22V.

The device includes an over-current protection (OCP) circuit which is programmable via an external resistor.

The open-drain output ACOK indicates a stable supply between the minimum supply voltage and OVLO threshold. It also deasserts after 8ms if the switch is in OCP mode when OC_MODE = Low. In case of a fault condition and the device temperature exceeds the maximum junction temperature, the device switches off. The KTS1693-1 has a VDET pin instead of ACOK pin for VBUS detection function. VDET pin provides a “clamped” output voltage whenever a voltage appears on VIN, even if the power switch is off due to an overvoltage condition.

The KTS1693 is available in a RoHS and Green compliant 20-Bump 2.160 x 1.935mm WLCSP.


  • Surge and ESD protected Input
    • Surge Protection
      • IEC 61000-4-5: ±110V
    • ESD Protection
      • IEC 61000-4-2 (Level 4)
        • Contact: ±8kV
        • Air Gap: ±15kV
        • Human Body Model ±2kV
  • Wide Input voltage range
    • 2.7V to 28V
  • Low Quiescent Current 140µA typ.
  • Integrated 9mΩ (typ) N channel MOSFET
  • Fast turn-off response time 100ns
  • Programmable OCP trip point: 1.0A ~ 6.0A
  • Flexible trip-point options
    • Fixed 5.95V or Adj. 4V to 22V
  • Auto-enabled switch with typ. 0.35ms debounce time
  • Additional Under voltage (UVLO), Short-circuit and thermal shutdown protection
  • Open-drain power good output
  • Pb-free WLCSP-20 package
  • -40°C to +85°C Temperature Range


  • Smartphones
  • Tablet, Computers
  • Mobile Internet Devices, Peripherals

Packaging Information

Package Dimensions Bumps Package Code
WLCSP45-20 1.935mm x 2.160mm x 0.62mm 20 VB


Vin (min)  Vin (max)  ON Resistance (mΩ) Max Current (A)
2.7V 28V 9mΩ 6A

Technical Documentation

Description Documents Type
Package Outline DrawingWLCSP45-20 VB PODPDF

Evaluation Tools

Documents Type
User ManualPDF
Quick Start GuidePDF
Bill of MaterialsXLSX
3D BoardPDF


Part Number Marking Operating Temperature Package
KTS1693EVB-1-TR NLXXYYZZZZ -40°C to +85°C WLCSP-20
Purchase Options
Buy from Digi-Key
Buy from Mouser