+12 Volt Electronic Fuse NIS5420 Series The NIS5420 eFuse is a cost effective, resettable fuse which can greatly enhance the reliability of a hard drive or other circuit from both catastrophic and shutdown failures. It is designed to buffer the load device from excessive input voltage which can damage sensitive circuits. It also includes an overvoltage www.onsemi.com clamp circuit that limits the output voltage during transients but does not shut the unit down, thereby allowing the load circuit to continue operation. 4.6 AMP, 12 VOLT Features ELECTRONIC FUSE Integrated Power Device Power Device Thermally Protected MARKING No External Current Shunt Required DIAGRAM 8 V to 18 V Input Range XXXXX 39 m Typical WDFN10 XXXXX Internal Charge Pump CASE 522AA ALYW Internal Undervoltage Lockout Circuit Internal Overvoltage Clamp XXX = Specific Device Code ESD Ratings: Human Body Model (HBM) 2000 V A = Assembly Location L = Wafer Lot These Devices are PbFree, Halogen Free/BFR Free and are RoHS Y = Year Compliant W = Work Week = PbFree Package Typical Applications (Note: Microdot may be in either location) Hard Drives Mother Board Power Management Fan Drives PIN CONNECTIONS Src GND dV/dt Src En/Flt V Src CC I Src LIM NC/I Src SENSE WDFN10 (Top View) ORDERING INFORMATION See detailed ordering, marking and shipping information in the ordering information section on page 11 of this data sheet. Semiconductor Components Industries, LLC, 2018 1 Publication Order Number: March, 2021 Rev. 2 NIS5420/DNIS5420 Series VCC Charge Enable Pump ENABLE/ FAULT SOURCE Thermal Current I LIMIT Limit Shutdown UVLO dv/dt dv/dt Voltage Control Clamp GND Figure 1. Block Diagram (NIS5420MT3, NIS5420MT4, NIS5420MT5) VCC Charge Enable Pump ENABLE/ FAULT SOURCE Current Thermal I LIMIT Limit Shutdown Current I SENSE Monitor UVLO dv/dt dv/dt Voltage Control Clamp GND Figure 2. Block Diagram (NIS5420MT1, NIS5420MT2, NIS5420MT6, NIS5420MT7, NIS5420MT8 www.onsemi.com 2