Description

The KTS1897 is a USB VBUS safety management load switch for up to 182W current-sink input for 28V EPR systems. The input operating range is 3V to 33V with VBUS withstand up to 39VDC and VSYS up to 35VDC. Ultra-fast over-voltage protection (OVP) is internally set to 33V but optionally adjusted via external resistors. Low on-resistance minimizes heat and voltage droop.

KTS1897A/B has automatic reverse-current protection (RCP) feature which acts as an “ideal diode” with fast recovery and isolates VBUS when charging or powering the system via another port. KTS1897C/D supports bi-directional mode when enabled. Additional safety management includes short-circuit protection (SCP) during soft-start, Over-Current Protection (OCP) and over-temperature protection (OTP).

The KTS1897 is packaged in advanced, fully “green” compliant, 2.56mm x 2.00mm, 20-bump Wafer-Level Chip-Scale Package (WLCSP).

Features

  • 3V to 33V Operating Voltage Range
  • 39VDC Abs. Max. Rating at VBUS and 35V at VSYS
  • 6.5A Continuous Current Rating
  • 24mΩ typ. On-Resistance from VBUS to VSYS
  • Soft-Start (SS) Limits Inrush Current
  • Over-Voltage Protection (OVP) at VBUS
    • 33V, 100ns Internally Fixed
    • 4V to 33V External Resistor Programmable
  • Over-Voltage Protection (OVP) latch off at VCHSYS
    • 4V to 28V External Resistor Programmable
  •  “Ideal Diode” Reverse-Current Protection (RCP, KTS1897A/B only)
    • VF = 20mV and 15µs Fast Recovery
    • Bi-directional Mode when enabled (KTS1897C/D only)
  • Reverse blocking when disabled
  • Short-Circuit Protection (SCP) at VBUS & VSYS
  • Over-Current Protection (OCP)
  • Over-Temperature Protection (OTP)
  • EN (KTS1897A/C) or EN (KTS1897B/D) Enable Logic
  • Hiccup Mode Auto-Retry after Faults
  • -40°C to 85°C Operating Temperature Range
  • 20-bump WLCSP 2.56 x 2.00mm (0.5mm pitch)

Applications

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

Packaging Information

Package Dimensions Package Code
WLCSP54-20 2.000mm x 2.560mm x 0.555mm IAD

Technical Documentation

Description Documents Type
DatasheetKTS1897-04cPDF

Purchase

Purchase Options
Buy from Digi-Key
Buy from Mouser