The KTS1898 is a USB VBUS safety management load switch for up to 165W current-sink input for 28V EPR systems. The input operating range is 3V to 32V with input/output withstand up to 35VDC. Ultra-fast overvoltage protection (OVP) is internally set to 33V, but optionally adjusted via external resistors. Low on-resistance minimizes heat and voltage droop. Reverse-current protection (RCP) acts as a 20mV “ideal diode” with fast recovery.

Additional safety management includes ultra-fast over-current protection (OCP), short-circuit protection (SCP) during and after soft-start, over-temperature protection (OTP), and an integrated transient voltage suppressor (TVS) for IEC industry standard ±30kV ESD and ±100V surge ratings.

The KTS1898 is packaged in advanced, fully “green” compliant, 2.56mm x 2.56mm, 25-bump Wafer-Level
Chip-Scale Package (WLCSP).


  • 3V to 32V Operating Voltage Range
  • 35VDC Abs. Max. Rating at IN and OUT
  • 6A Continuous Current Rating
  • 24mΩ typ. On-Resistance from IN to OUT
  • Soft-Start (SS) Limits Inrush Current
  • Over-Voltage Protection (OVP) at IN
    • 33V, 100ns Internally Fixed
    • 4V to 33V External Resistor Programmable
  • “Ideal Diode” Reverse-Current Protection (RCP)
    • VF = 20mV and 15µs Fast Recovery
  • Short-Circuit Protection (SCP) during & after SS
  • 12A, 150ns Over-Current Protection (OCP)
  • Over-Temperature Protection (OTP)
  • Transient Voltage Suppression (TVS) at IN
    • ±100V Surge Protection (IEC61000-4-5)
    • ±30kV ESD Contact Discharge (IEC61000-4-2)
    • ±30kV ESD Air Gap Discharge (IEC61000-4-2)
  • EN (KTS1898A) or EN (KTS1898B) Enable Logic
  • Hiccup Mode Auto-Retry after Faults
  • ACOK Open-Drain Output Flag
  • -40°C to 85°C Operating Temperature Range
  • 25-bump WLCSP 2.56 x 2.56mm (0.5mm pitch)


  • Notebooks, Gaming PCs
  • Mini Desktop PCs, Docking Stations, Monitors

Packaging Information

Package Dimensions Bumps Package Code Package Outline Drawing
WLCSP55-25 2.560mm x 2.560mm x 0.555mm 25 OAE PDF


Vin (min)  Vin (max)  Surge (V) RON (mΩ) IMAX (A) RBP RCP OCP OVP Adj.
3V 32V ±100 25 5.0 Yes Yes Yes 4V~31V

Technical Documentation

Description Documents Type
Package Outline DrawingWLCSP55-25 OAE PODPDF

Evaluation Tools

Documents Type
User ManualPDF
Quick Start GuidePDF
Bill of MaterialsXLSX


Part Number Marking Operating Temperature Package

* Future device; contact an authorized Kinetic Technologies representative for availability.

Purchase Options
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