AZ1117CH-1.8TRG1 from Diodes Incorporated AZ1117CH 1 8TRG1, in a SOT-223. 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 / regulator common return. On the fixed-voltage AZ1117C-1.8 the ADJ/GND pin functions as ground (the internal divider ties the reference to this node). Connect directly to system ground.
2	OUTPUT	power_out	Regulated 1.8V output. Nominal 1.8V ±1% at 25°C (1.782-1.818V), ±2% over -20°C to +125°C (1.764-1.836V). Requires a minimum 10 µF output capacitor with ESR < 20 Ω for stability; internally shorted to the SOT-223 tab (pin 4).
3	INPUT	power_in	Unregulated input supply. Recommended operating range up to 15V (absolute max 18V). Dropout is typically 1.2V (max 1.3V) at 0.8A on SOT-223. A 10 µF input decoupling capacitor is recommended.
4	VOUT	power_out	Large heat-slug tab on the top of the SOT-223 body; electrically connected to OUTPUT (pin 2). Solder to a copper pour on the PCB for both the OUTPUT connection and primary heat-sinking (θJA ≈ 125°C/W without heatsink, ≈100°C/W with copper heatsink).

Key specifications

Parameter	Value
Manufacturer	Diodes Incorporated AZ1117CH 1 8TRG1
Package	SOT-223
Category	PMIC
Pins	4

Ordering variants

AZ1117CH-1.8TRG1H
AZ1117CH-1.8TRG1H2
AZ1117CH-1.8TRG1R
AZ1117CH-1.8TRG1R2
AZ1117CH-1.8TRG1D

CAD (KiCad official)

Symbol: AZ1117CH-1.8TRG1
Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
3D model: SOT-223 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`az1117ch-1-8trg1.step`	64 KB	You want the bare part, or you mark your own boards.
`az1117ch-1-8trg1-etched.step`	2.0 MB	You want the part with `AZ1117CH-1.8TRG1` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 531 faces against 75 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: Diodes Incorporated AZ1117CH 1 8TRG1 datasheet (24 pp, sha256 8333717aa7b5f90f, 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