LM217LD13TR from STMicroelectronics, in a SOIC-8. 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 supply. Input-to-output differential up to 40 V max. A 0.1 uF bypass capacitor to ground is recommended near the pin.
2	VOUT	power_out	Regulated output. Adjustable from 1.2 V to 37 V; delivers up to 100 mA of load current. Requires a minimum load current (typ. 3.5 mA) for regulation.
3	VOUT	power_out	Regulated output (internally tied to pin 2). SO-8 doubles the output pin for improved current handling and thermal performance.
4	ADJ	input	Adjustment pin. Connects to the top of the external resistor divider that sets Vout = Vref x (1 + R2/R1) + Iadj x R2, with Vref = 1.25 V typ. Adjust pin current is 50 uA typ (100 uA max).
5	NC	unconnected	No internal connection. Leave floating or tie to a copper pour for mechanical support.
6	VOUT	power_out	Regulated output (internally tied to pins 2 and 3). SO-8 provides three output pins for improved current handling and thermal dissipation.
7	VOUT	power_out	Regulated output (internally tied to pins 2, 3, and 6). SO-8 pins 2/3/6/7 are all the regulator output.
8	NC	unconnected	No internal connection. Leave floating or tie to a copper pour for mechanical support.

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	SOIC-8
Category	PMIC
Pins	8

Ordering variants

Same part, different packaging or reel option.

LM217LD13TR
LM217LD13TRLM317LD13TR
LM217LD13TRLM317LZ
LM217LD13TRLM317LZ-AP
LM217LD13TRLM317LZ-TR
LM217LZ-TR

CAD (KiCad official)

Symbol: LM217LD13TR
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`lm217ld13tr.step`	122 KB	You want the bare part, or you mark your own boards.
`lm217ld13tr-etched.step`	1.8 MB	You want the part with `LM217LD13TR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 464 faces against 147 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: STMicroelectronics datasheet (23 pp, sha256 6f70ef728068a972, 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