TLV1117-50IDCYR 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 reference for the fixed-voltage (5 V) version. This pin is labeled ADJ/GND in the datasheet; on the -50 fixed-output variant it is tied to the internal reference return and must be connected to system ground.
2	VOUT	power_out	Regulated 5-V output. Typical VOUT = 5.0 V (4.90 V to 5.10 V over line/load, TLV1117-50I). Sources up to 800 mA. Requires an output capacitor with ESR between 0.2 Ω and 10 Ω (10-µF tantalum/aluminum electrolytic recommended) for stability.
3	VIN	power_in	Unregulated input supply. Recommended VIN = 6.4 V to 15 V for the 5-V option (headroom above VOUT + dropout). Absolute maximum continuous input voltage is 16 V. A 10-µF input capacitor is recommended.
4	VOUT	power_out	Tab pin, electrically connected to the VOUT node and serving as the primary thermal path. Should be soldered to a copper pour tied to VOUT to sink the regulator's dissipated power.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

TLV1117-50IDCYR
TLV1117-50IDCYR50CDCY
TLV1117-50IDCYR50CDCYR
TLV1117-50IDCYR50CKVUR
TLV1117-50IDCYR50IKVUR
TLV1117-50IDCYR50CDRJR
TLV1117-50IDRJR
TLV1117-50IDCYRCKCS
TLV1117-50IDCYRCKCT
TLV1117-50IDCYRCKTTR
TLV1117-50IDCYRIKTTR

CAD (KiCad official)

Symbol: TLV1117-50IDCYR
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 (35 pp, sha256 379f0597207846a7, 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