KTS1681A 4 Amp Over-Voltage Protection IC with Sense Output Features Brief Description Wide Input voltage range: 2.3V to 28V The KTS1681A over-voltage protection (OVP) device Up to 4A Continuous current capability features an ultra-low 28m (typical) on-resistance high Integrated 28m (typ) N-Channel MOSFET current integrated MOSFET which actively protects low- Wide Over-Voltage threshold range voltage systems from voltage supply faults up to +28V . DC Fixed internal: 5.95V An internal clamp protects the device from surges up to Adjustable: 4V to 22V 100V. Fast OVP response time: 0.1s (typ.) An input voltage exceeding the over-voltage threshold will Internal 15ms Startup Debounce cause the internal MOSFET to turn off, preventing Integrated Surge Protection up to 100V excessive voltage from damaging downstream devices. Low Quiescent Current: 70A (typ.) When the OVLO input set below the external OVLO select Thermal Shutdown and Short Circuit Protection voltage, the KTS1681A automatically chooses the internal Compliance to IEC61000-4-2 (Level 4) fixed OVLO threshold, preset to 5.95V (typical). The over- Contact: 8kV voltage protection threshold can be adjusted with optional Air Gap: 15kV resistor divider to a voltage between 4V and 22V. ESD Protection Human Body Model: 2kV The KTS1681A is protected against over-current faults by Pb-free Package: 12-Bump WLCSP an internal over-temperature protection shutdown feature. -40C to +85C Temperature Range The KTS1681A is available in a RoHS and Green compliant 12-Bump 1.70mm x 1.21mm x 0.62mm WLCSP. Applications Smartphones Tablet Mobile Internet Devices, Peripherals Typical Application Adapter/USB Battery Charger IN OUT IC C OUT C IN 1F KTS1681A R1 1nF PMIC VDET OVLO CTRL Application GND Processor R2 December 2018 Revision 04d Page 1 Company Confidential KTS1681A Pin Descriptions Pin Name Function A1 CTRL OUT power path is Enabled when CTRL is logic Low. Output of internal main high-current power switch. Connect OUT pins together in the PCB for A2, A3, B2 OUT proper operation. A4, B4, C4 GND Ground. Connect GND pins together in the PCB for proper operation. B1 VDET Output from IN pin, with internal protection clamp. VDET can source 1mA. B3, C2, C3 IN Voltage Input. Connect IN pins together in the PCB for proper operation. External OVLO Adjustment. Connect OVLO to GND when using the internal fixed threshold. C1 OVLO Connect a resistor-divider to OVLO to set the adjustable OVLO threshold. The optional external resistor divider is unrelated to the internal threshold. WLCSP34-12 TOP VIEW TOP VIEW WLCSP-12 A CTRL OUT OUT GND WW 12-Bump 1.16mm x 1.65mm x 0.64mm B VDET OUT IN GND WLCSP Package XXYY Top Code XX = Device Code C OVLO IN IN GND ZZZZ YY = Date Code, ZZ = Assembly Code 1 2 3 4 12-Bump 1.70mm x 1.21mm x 0.62mm WLCSP Package Top Mark WW = Device ID Code = LG XX = Date Code, YY = Assembly Code ZZZZ = Serial Number December 2018 Revision 04d Page 2 Company Confidential