The Infineon BTS428L2ATMA1 is a single-channel PROFET® high-side power switch in a PG-TO252-5-1 (DPak) surface-mount package. It switches a resistive or inductive load on the high side with a typical on-resistance of 50 mOhm, sinking up to 5.8 A continuous.
On/Off interface with Status Flag feedback
The input is a non-inverting On/Off logic pin — no Vcc supply rail required, the gate drive is self-biased from the load supply. A Status Flag output (open-drain, active low) asserts during fault conditions: over-current, over-temperature, or over-voltage. This flag can feed a microcontroller GPIO or a diagnostic lamp. The 1:1 input-to-output ratio means one logic signal controls the single output channel.
Protection set for unregulated loads
Fixed current limiting holds the output current to a safe level during a short circuit or heavy overload; the switch does not latch off but cycles in thermal limit until the fault clears. Over-temperature protection shuts the output off when the junction exceeds the thermal threshold, with auto-restart on cool-down. Over-voltage clamping protects the switch and downstream load from supply transients up to the absolute maximum rating. These protections are integrated — no external sense resistor, no comparator, no TVS for typical automotive transients.
Housed in a PG-TO252-5-1 (DPak, 4 leads plus tab) surface-mount package. The DPak footprint is standard; the tab's thermal pad connects to the output node, so the PCB layout must isolate the tab pad from ground.
ROHS3 compliant — no exemption-timed substances. The base product number is BTS428L2; the full order code includes the package and reel suffix.