NIS5431 Series +3.3 Volt Electronic Fuse The NIS5431 series 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 4.5 AMP, 3.3 VOLT operation. ELECTRONIC FUSE Features Integrated Power Device Power Device Thermally Protected No External Current Shunt Required WDFN10 40 m Typical CASE 522AA Internal Charge Pump Internal Undervoltage Lockout Circuit Internal Overvoltage Clamp MARKING DIAGRAM ESD Ratings: Human Body Model (HBM) 2000 V Pin Function 1 31 Machine Model (MM) 200 V 15 SOURCE AYW 6I LIMIT+ These are PbFree Devices and are RoHS Compliant 7I LIMIT 8 Enable/Fault Typical Applications 9 dv/dt Mother Board 10 GND 11 (flag) VCC Hard Drives Fan Drives 31 = Specific Device Code A = Assembly Location Y = Year W = Work Week = PbFree Package (Note: Microdot may be in either location) ORDERING INFORMATION Device Features Package Shipping NIS5431MT1TXG Thermal Latching WDFN10 3000 / Tape & Reel (PbFree) For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. Semiconductor Components Industries, LLC, 2015 1 Publication Order Number: November, 2015 Rev. 1 NIS5431/DNIS5431 Series VCC Charge Enable Pump ENABLE/ FAULT SOURCE Current Thermal I LIMIT Limit Shutdown UVLO dv/dt dv/dt Voltage Control Clamp GND Figure 1. Block Diagram Table 1. FUNCTIONAL PIN DESCRIPTION Pin Function Description 15 Source This pin is the source of the internal power FET and the output terminal of the fuse. 7 I A resistor between this pin and the source pin sets the overload and short circuit current limit Limit levels. 8 Enable/Fault The enable/fault pin is a tristate, bidirectional interface. 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. If a ther- mal fault occurs, the voltage on this pin will go to an intermediate state to signal a monitoring cir- cuit that the device is in thermal shutdown. It can also be connected to another device in this fami- ly to cause a simultaneous shutdown during thermal events. 9 dv/dt The internal dv/dt circuit controls the slew rate of the output voltage at turn on. It has an internal capacitor that allows it to ramp up over a period of 1.4 ms. An external capacitor can be added to this pin to increase the ramp time. If an additional time delay is not required, this pin should be left open. 10 Ground Negative input voltage to the device. This is used as the internal reference for the IC. 11 (belly pad) V Positive input voltage to the device. CC MAXIMUM RATINGS Rating Symbol Value Unit Input Voltage, operating, steadystate (V to GND, Note 1) V 0.6 to 14 V CC IN Thermal Resistance, JunctiontoAir C/W JA 2 0.1 in copper (Note 2) 227 2 0.5 in copper (Note 2) 95 Thermal Resistance, JunctiontoLead (Pin 1) 27 C/W JL Thermal Resistance, JunctiontoCase 20 C/W JC Total Power Dissipation T = 25C P 1.3 W A max Derate above 25C 10.4 mW/C Operating Temperature Range (Note 3) T 40 to 150 C J Nonoperating Temperature Range T 55 to 155 C J Lead Temperature, Soldering (10 Sec) T 260 C L Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. 1. Negative voltage will not damage device provided that the power dissipation is limited to the rated allowable power for the device. 2. 1 oz copper, doublesided FR4. 3. Thermal limit is set above the maximum thermal rating. It is not recommended to operate this device at temperatures greater than the maximum ratings for extended periods of time. www.onsemi.com 2