BTF3125EJ Smart Low-Side Power Switch 1 Overview Features Single channel device 3.3V and 5V compatible logic input PWM switching capability 20kHz for 10-90% duty cycle Electrostatic discharge protection (ESD) Adjustable switching speed Digital latch feedback signal Very low power DMOS leakage current in OFF state DMOS turn on capability in inverse current situation Green Product (RoHS compliant) Potential applications Suitable for resistive, inductive and capacitive loads Replaces electromechanical relays, fuses and discrete circuits Allows high inrush currents and active freewheeling Product validation Qualified for automotive applications. Product validation according to AEC-Q100/101. Description The BTF3125EJ is a 125 m single channel Smart Low-Side Power Switch with in a PG-TDSO-8-31 package providing embedded protective functions. The power transistor is built by an N-channel vertical power MOSFET. The device is monolithically integrated. The BTF3125EJ is automotive qualified and is optimized for 12V automotive and industrial applications. Table1 Product Summary Operating voltage range V 3 .. 28 V OUT Maximum battery voltage V 40 V BAT(LD) Operating supply voltage range V 3.0 .. 5.5 V DD Maximum input voltage V 5.5 V IN Maximum On-State resistance at T = 150C, V = 5V, V = 5V R 250 m j DD IN DS(ON) Datasheet 1 Rev. 1.0 www.infineon.com/hitfet 2018-08-08 BTF3125EJ Smart Low-Side Power Switch Overview Table1 Product Summary (contd) Nominal load current I 2A L(NOM) Minimum current limitation I 5 A L(LIM) Minimum current limitation trigger level I 12 A L(LIM)TRIGGER Maximum OFF state load current at T 85C I 1A J L(OFF) Maximum stand-by supply current at T = 25C I 6A J DD(OFF) Type Package Marking BTF3125EJ PG-TDSO-8-31 F3125EJ Diagnostic Functions Short circuit to battery Over temperature shut down Stable latching diagnostic signal Protection Functions Over temperature shutdown with auto-restart Active clamp over voltage protection of the output (OUT, cooling tab) Current limitation Enhanced short circuit protection Detailed Description The device is able to switch all kind of resistive, inductive and capacitive loads, limited by maximum clamping energy and maximum current capabilities. The BTF3125EJ offers dedicated ESD protection on the IN, V , ENABLE, STATUS and SRP pin which refers to DD the GND ground pin, as well as an over voltage clamping of the OUT to Source/GND. The over voltage protection gets activated during inductive turn off conditions or other over voltage events (like load dump). The power MOSFET is limiting the drain-source voltage, if it rises above the V OUT(CLAMP). The over temperature protection prevents the device from overheating due to overload and/or bad cooling conditions. The BTF3125EJ has an auto-restart thermal shutdown function. The device will turn on again, if input is still high, after the measured temperature has dropped below the thermal hysteresis. Datasheet 2 Rev. 1.0 2018-08-08