TLE42754D from Infineon, in a TO-252-4. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	I	power_in	Input supply pin. Regulated input from the vehicle battery / raw supply (operating input up to 42 V; withstands -42 V to 45 V). An input capacitor C_I to GND close to the IC terminals is recommended for compensating line influences.
2	RO	output	Reset Output. Open-collector output driven by the internal reset generator when the output voltage falls below V_Q,rt (typ. 4.65 V). Requires an external pull-up resistor to a positive potential; leave open if the reset function is not needed.
3	GND	power_in	Ground. On the TLE42754D (PG-TO252-5), pin 3 is not internally connected as GND on the leads; ground is provided via the TAB. (On the TLE42754G PG-TO263-5, pin 3 is internally connected to the tab.) Connect to system ground.
4	D	passive	Reset Delay Timing. Connect a ceramic capacitor from D to GND to program the power-on/undervoltage reset delay time. Leave open if the reset function is not needed.
5	Q	power_out	Regulated Output. 5 V ± 2% output capable of sourcing up to 450 mA with integrated current limiting. Block to GND with an output capacitor C_Q close to the IC terminals, respecting the C_Q/ESR values in the Functional Range table.
TAB	GND	power_in	Exposed metal TAB. Serves as the device ground and primary heat-sinking path; connect to the heatsink area / ground plane on the PCB.

Key specifications

Parameter	Value
Manufacturer	Infineon
Package	TO-252-4
Category	PMIC
Pins	6

Ordering variants

Same part, different packaging or reel option.

TLE42754DD
TLE42754DG
TLE42754DE

CAD (KiCad official)

Symbol: TLE42754D
Footprint: Package_TO_SOT_SMD:TO-252-2
3D model: TO-252-4 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`tle42754d.step`	178 KB	You want the bare part, or you mark your own boards.
`tle42754d-etched.step`	1.5 MB	You want the part with `TLE42754D` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 428 faces against 127 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Infineon datasheet (29 pp, sha256 903108b634588660, retrieved 2026-08-17, tier: lcsc)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF