TLV1117LV28DCYR from Texas Instruments, in a SOT-223-4. 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	GND	power_in	Ground pin. Common return for the regulator; connect directly to the system ground plane.
2	OUT	power_out	Regulated 2.8V output pin. Requires a 1 µF (min) ceramic output capacitor for stability; delivers up to 1A of load current with typical dropout of 455 mV at 1A (Vout ≥ 3.3V) / 570 mV at 1A (Vout < 3.3V).
3	IN	power_in	Unregulated input pin. Operates from 2V to 5.5V (absolute max 6V). Bypass with a 1 µF ceramic capacitor close to the pin.
Tab	OUT	power_out	SOT-223 heat-slug tab, electrically connected to the OUT pin. Solder to a copper pour for thermal dissipation (θJA = 62.9 °C/W).

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOT-223-4
Category	PMIC
Pins	4

Ordering variants

Same part, different packaging or reel option.

TLV1117LV28DCYR

CAD (KiCad official)

Symbol: TLV1117LV28DCYR
Footprint: Package_TO_SOT_SMD:SOT-223
3D model: SOT-223-4 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Texas Instruments datasheet (25 pp, sha256 0f459b8f652927f7, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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