Features

• Wide Input voltage range: 2.3V to 28V
• Up to 4A Continuous current capability
• Integrated 38mΩ (typ) N-Channel MOSFET
• Wide Over-Voltage threshold range
 Fixed internal: 5.95V
 Adjustable: 4V to 22V
• Fast OVP response time: 0.1μs (typ.)
• Microphone Mode for audio signal on IN
• Internal 15ms Startup Debounce
• Integrated Surge Protection up to 100V
• Low Quiescent Current: 70μA (typ.)
• Thermal Shutdown and Short Circuit Protection
• Compliance to IEC61000-4-2 (Level 4)
 Contact: ±8kV
 Air Gap: ±15kV
• ESD Protection
 Human Body Model: ±2kV
• Pb-free Package: 12-Bump WLCSP
• -40°C to +85°C Temperature Range

Applications

• Smartphones
• Tablet
• Mobile Internet Devices, Peripherals

Brief Description

The KTS1681 over-voltage protection (OVP) device
features an ultra-low 38mΩ (typical) on-resistance high
current integrated MOSFET which actively protects lowvoltage
systems from voltage supply faults up to +28VDC.
An internal clamp protects the device from surges up to
100V.
An input voltage exceeding the over-voltage threshold will
cause the internal MOSFET to turn off, preventing
excessive voltage from damaging downstream devices.
When the OVLO input set below the external OVLO select
voltage, the KTS1681 automatically chooses the internal
fixed OVLO threshold, preset to 5.95V (typical). The overvoltage
protection threshold can be adjusted with optional
resistor divider to a voltage between 4V and 22V.
The device features a microphone mode which disables
the OVP switch and allows the microphone signal present
on the input to be output at VDET pin without an additional
multiplexer circuit. The KTS1681 is protected against overcurrent
faults by an internal over-temperature protection
shutdown feature.
The KTS1681 is available in a RoHS and Green compliant
12-Bump 1.288mm x 1.988mm x 0.64mm WLCSP.