78D05AL-TN3-R from UTC Unisonic Tech, in a TO-252-2(DPAK). 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	VIN	power_in	Unregulated positive input voltage. Accepts up to 35V absolute maximum; for 5V output, recommended VIN range is 7.5V to 20V with a typical dropout of 2.0V. A 0.33 uF bypass capacitor should be placed close to this pin.
2	GND	power_in	Common ground reference for both input and output. The tab (heat slug) of the TO-252 package is electrically connected to this pin.
3	VOUT	power_out	Regulated +5V output, factory trimmed to 5.0V typical (4.80V-5.20V for IOUT=5mA-1A). Delivers up to 1A continuous output current with internal short-circuit limiting to ~250mA and 1.8A peak. A 0.1 uF output capacitor is recommended for stability and transient response.

Key specifications

Parameter	Value
Manufacturer	UTC Unisonic Tech
Package	TO-252-2(DPAK)
Category	PMIC
Pins	3

Ordering variants

78D05AL-TN3-R
78D05AL-TN3-R78D05AG-TN3-R
78D05AL-TN3-R78D05AL-TM3-T
78D05AL-TN3-R78D05AG-TM3-T
78D05AL-TN3-R78D05AG-AA3-R
78D05AL-TN3-R78D05AL-TNA-R
78D05AL-TN3-R78D05AG-TNA-R

CAD (KiCad official)

Symbol: 78D05AL-TN3-R
Footprint: Package_TO_SOT_SMD:TO-252-2
3D model: TO-252-2(DPAK) (KiCad packages3D, STEP)

Provenance

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

Datasheet: UTC Unisonic Tech datasheet (10 pp, sha256 c5fc6db88bc91244, retrieved 2026-08-17, tier: manufacturer)
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