AP91352 SAS DISABLE +5V eFUSE WITH INTEGRATED ISOFET Description Pin Assignments The eFuse is a 5V protection device with a bidirectional switch that (Top View) incorporates input slew rate control to reduce input surge current and reverse current detection to prevent discharge to VCC from VOUT. GND The eFuse protection features include under voltage lockout, a fixed 12 2.5A current limit, trimmed fast response over voltage protection and 1 11 VCC VOUT thermal shutdown. The EN/FAULT line is a tri-state bidirectional interface that can be used to disable the output by pulling the line low VCC 2 10 VOUT through an external open drain device. If a thermal fault occurs, the VCC 3 9 VOUT voltage on the pin will go to an intermediate voltage indicating a fault 13 and it can be connected to another device to cause simultaneous shut 4 8 NC SAS down. The SAS pin is an ESD protected interface that allows direct 5 EN/FAULT 7 NC external control of the eFuse. Driving the SAS pin high pulls the 6 enable line low causing the eFuse to shutdown and enter a low quiescent current state. NC W-QFN3020-12 The integrated Isofet latches off when the reverse current is detected. This can be reset only by triggering the under voltage lock out, by EN/FAULT pin or when voltage on the output pin (VOUT) falls below Applications the supply pin voltage (VCC) in AP91352. HHD Drives SSD Drives The AP91352 is available in a standard Green W-QFN3020-12 Mother Board Power Management package and is RoHS compliant. Printer Load Power Management Fan Drives Features SAS Disable 2.1V Signal Disables the eFuse ESD Compliant to 1kV HBM and 500V CDM Integrated Isofet that latches off when reverse current is detected. Latch off is reset by VOUT Falling below VCC UVLO Trigger EN/FAULT Pin Input Tolerant of Continuous +12V 50m Typical Total on Resistance Fixed 2.5A Over Current Protection (OCP) Over Voltage Protection (OVP) Fixed 13ms +/- 20% Slew Rate Control (SRC) Over Temperature Protection (OTP) Under Voltage Lockout (UVLO) Thermally Efficient Low Profile Package, W-QFN3020-12 Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See AP91352 Typical Applications Circuit EN N Pin Descriptions Pin Number Pin Name Description Supply input, a 1F capacitor is needed to supply internal charge pump. The capacitor return 1, 2, 3 VCC should be connected directly to the GND pin. 4 SAS SAS Disable, When this pin is pulled high to a voltage greater then 2.1V, the eFuse is turned off. The EN/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 device. If a thermal fault occurs, 5 EN/FAULT the voltage on this pin will go to an intermediate state to signal a monitoring circuit that the device is in thermal shutdown. It can also be connected to another device in this family to cause a simultaneous shutdown during thermal events. 6, 7, 8 NC Do not connect on PCB, internally connected for production purpose Output: eFuse controlled output a 20F capacitor is needed for over voltage protection stability. 9, 10, 11 VOUT The capacitor return should be connected directly to the GND pin. 12 GND Ground 13 GND Ground exposed pad 2 of 12 AP91352 May 2016 Diodes Incorporated www.diodes.com Document number: DS38109 Rev. 2 - 2 NEW PRODUCT