+5 Volt Electronic eFuse NIS6351 The NIS6351 is a cost effective, resettable fuse which can greatly enhance the reliability of a USB application from both catastrophic and shutdown failures. It is designed to buffer the load device from excessive input voltage which can damage sensitive circuits and to protect the input side www.onsemi.com circuitry from reverse currents. It includes an overvoltage clamp circuit that limits the output voltage during transients but does not shut the unit down, thereby allowing the load circuit to continue its operation. Features WDFNW10, 3 x 3 CASE 515AB 85 m Max R DS(on) Integrated Reverse Current Protection Adjustable Output Current Limit Protection with Thermal Shutdown MARKING DIAGRAM IEC6100042 Level 4 ESD Protection for V up to 7 kV bus Fast Response Overvoltage Clamp Circuit with Selectable Level XXXXX XXXXX Internal Undervoltage Lockout Circuit ALYW Digital Enable with Separate FLAG for Fault Identification Integrated Current Monitoring A = Assembly Location Both Latching and AutoRetry Options Available L = Wafer Lot These Devices are PbFree, Halogen Free/BFR Free and are RoHS Y = Year W = Work Week Compliant = PbFree Package Typical Applications (Note: Microdot may be in either location) Automotive Infotainment USB 2.0/3.0/3.1 VBUS PIN CONNECTIONS USB TypeC PD Charging 1 Solid State Drives V SRC CC Mother Boards V SRC CC GND N/C Ilim I EN MON Vc SEL FLAG (Top View) ORDERING INFORMATION See detailed ordering, marking and shipping information on page 8 of this data sheet. Semiconductor Components Industries, LLC, 2020 1 Publication Order Number: August, 2020 Rev. 1 NIS6351/DNIS6351 +3.3V System NIV1161/NIV2161 Power Vcc D D USB Transceiver IC D+ D+ GND USB 2.0 Connector Vbus +5V C 22F L System 47F C IN Power Vcc Source GND Vcc Source Rlim GND Ilim NIS6351 R MON 1 F 1k Imon EN Enable Vc SEL FLAG FLAG Floating or Grounded Figure 1. Typical USB 2.0 Application Circuit VCC EN EN Reverse Current FLAG FLAG Charge Thermal Pump Shutdown Source UVLO Current Current Voltage Limit Vc SEL Sense Clamp Imon Ilim GND Figure 2. Block Diagram PIN FUNCTION DESCRIPTION Pin No. Pin Name Description 1, 2 V Positive input voltage to the device. (Low ESR capacitor of minimum 47 F from V to GND is required) CC CC 3 GND Negative input voltage to the device. This is used as the internal reference for the IC. 4 I This pin can be used to monitor the output current by using an external pulldown resistor and decoupling MON capacitor. 5 Vc SEL The Vc SEL pin allows the overvoltage clamp to be set at either a 5.6 V or 6.2 V minimum. 6 FLAG If a thermal fault occurs, the voltage on this pin will go to a low state to signal a monitoring circuit that the device is in thermal shutdown. 7 EN When this pin is pulled low the eFuse is turned off. It can be used to enable or disable the output of the device by pulling it to ground using an open drain or open collector device, as it has an internal pull up. 8 Ilim A resistor between this pin and the source pin sets the overload and short circuit current limit levels. 9, 10 Source Source of the internal power FET and the output terminal of the fuse 11 N/C (EP) (Exposed Pad) This pad to be used as heatsink only with no electrical connection. It should be connected to a large area of copper on the PCB, or to the PCBs GND plane. www.onsemi.com 2