This product is not recommended for new designs. Existing customers should contact their local sales office for more information.

Adjustable Overvoltage Protection Switch

Description

The KTS1663 overvoltage protection device features an ultra-low 26mΩ (typical) on-resistance high current integrated MOSFET which actively protects low-voltage systems from voltage supply faults up to +40V.

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

The KTS1663 offers three different fixed OVP options, plus a fully adjustable option. When the OVLO input is connected to GND, the KTS1663 automatically chooses the internal fixed OVLO threshold, preset to 5.95V (typical). Allowing OVLO to float, gives a preset of 10.2V (typical) and connecting a resistor to GND between 30kΩ and 80kΩ gives a preset of 13.5V (typical) The overvoltage protection threshold can also be fully adjusted with an optional external resistor divider to a voltage between 4V and 28V.

The KTS1663 features an open-drain output POK indicating a stable supply between the minimum supply voltage and OVLO threshold. In addition, a VDET output is provided to indicate the presence of a voltage at VBUS and is independent of the OVP switch. In case the device temperature exceeds the maximum junction temperature, the device switches off.

The KTS1663 is available in a RoHS and Green compliant 12-Bump 1.28 x 1.94 x 0.62mm WLCSP.

Features

  • Wide Input voltage range: 2.5V to 40V
    • Up to 4.5A current capability
    • Integrated 26mΩ (typ) N-Channel MOSFET
    • Fast OVP turn-off response time: 100ns
  • Selectable trip-point options
    • Fixed 5.95V
    • Fixed 10.2V
    • Fixed 13.5V
    • Adj. 4V to 28V
  • Auto-enabled switch with 18ms debounce time
  • Under voltage (UVLO), Short-circuit and thermal shutdown protection
  • Open-drain power good output
  • VDET output to indicate the presence of VBUS
  • ESD Protection
    • Human Body Model: ±2.0kV
  • Pb-free WLCSP-12 package
  • -40°C to +85°C Temperature Range

Applications

  • Smartphones
  • Mobile Internet Devices
  • Tablet Computers
  • Peripherals

Packaging Information

Package Dimensions Package Code
WLCSP34-12 1.940mm x 1.280mm x 0.620mm UW

Parameters

Vin (Min) Vin (Max) Switching Frequency (MHz) Output Auto-Discharge Max Current (A) Package
2.5V 40V – 4.5 WLCSP12 1.28mm x 1.94mm x 0.62mm

Purchase

Purchase Options
Buy from Digi-Key
Buy from Mouser