The KTS1697A is a low-resistance, high-current load switch with soft-start, over-voltage protection, “ideal diode” reverse-current protection with fast recovery, short-circuit protection, over-current protection, over-temperature protection, and integrated TVS. It is optimized to protect systems with USB Type-C PD ports and barrel connectors that sink up to 140W at 20V and must withstand up to 29V on VBUS.

Automatic reverse-current protection acts as an “ideal diode” with fast recovery and isolates VBUS when charging or powering the system via another port, regardless of the enable status. Soft-start limits inrush current when turning on with large capacitors at the output. The integrated TVS provides IEC industry standard ESD and ±90V surge ratings.

The KTS1697A is packaged in advanced, fully “green” compliant, 2.70 x 2.70mm, 25-bump Wafer-Level ChipScale Package (WLCSP).



  • 3V to 23V Operating Voltage Range
  • 29V Abs. Max. Rating at IN and OUT
  • 7A Continuous Current Rating
    • 15A Pulse Current Rating (duration Pd limited)
  • 11mΩ typ. On-Resistance from IN to OUT
  • Soft-Start (SS) Limits Inrush Current
  • Over-Voltage Protection (OVP) at IN
    • 23V Internally Fixed
    • 4V to 23V External Resistor Programmable
  • “Ideal Diode” Reverse-Current Protection (RCP)
    • RCP Fast Recovery without Fault Indication
  • Short-Circuit Protection (SCP) at OUT
  • Over-Current Protection (OCP)
  • Over-Temperature Protection (OTP)
  • Transient Voltage Suppression (TVS) at IN
    • ±90V Surge Protection (IEC61000-4-5)
    • ±8kV ESD Contact Discharge (IEC61000-4-2)
    • ±15kV ESD Air Gap Discharge (IEC61000-4-2)
  • EN Active-Low Enable Logic Input
  • Auto-Retry after All Faults
  • ACOK Open-Drain Output Flag
  • -40°C to 85°C Operating Temperature Range
  • 25-bump WLCSP 2.70 x 2.70mm (0.5mm pitch)


  • Notebooks, Netbooks, Ultra-Books, Tablets
  • Mini Desktop PCs, Docking Stations, Monitors

Packaging Information

Package Dimensions Bumps Package Code
WLCSP55-25 2.70mm x 2.70mm x 0.62mm 25 OAB


Vin (min)  Vin (max)  ON Resistance (mΩ) Max Current (A) OVP Trip Point (V) OVP Turn Off Response Time (ns) IEC 61000-4-2 ESD (Air Discharge) IEC 61000-4-2 ESD (Contact Discharge)
3V 29V 11 7 Fixed: 23V Adj: 4 – 23 ±90 ±15kV ±8kV

Technical Documentation

Description Documents Type
Package Outline DrawingWLCSP55-25 OAB PODPDF

Evaluation Tools

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


Part Number Marking Operating Temperature Package
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