component
LM317LD
Public Made by Adomby adom
UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLM317LD
UMW · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOP-8
LM317LD from UMW, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VIN | power_in | Regulator input; input-output differential must not exceed 40V and must be at least 3V for the specified regulation. |
| 2 | VOUT | power_out | Regulated output, adjustable from 1.2 to 37V and supplying more than 0.1A of load current. |
| 3 | VOUT/3 | power_out | Additional regulated output pin (labelled VOUT/3 on the SOP-8 pinout), the third of the output pins. |
| 4 | ADJ | input | Adjustment pin that sets the output voltage via the R1/R2 divider (VO=1.25V(1+R2/R1)+Iadj R2), with IADJ typically 50µA. |
| 5 | NC/2 | unconnected | No connect pin (second NC, labelled NC/2 on the SOP-8 pinout). |
| 6 | VOUT/4 | power_out | Additional regulated output pin (labelled VOUT/4 on the SOP-8 pinout), the fourth of the output pins. |
| 7 | VOUT/2 | power_out | Additional regulated output pin (labelled VOUT/2 on the SOP-8 pinout), the second of the output pins. |
| 8 | NC | unconnected | No connect pin. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | SOP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
LM317LD - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
lm317ld-etched.step/lm317ld-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm317ld.step/lm317ld.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UMW datasheet (8 pp, sha256
47c632ae21db9ba9, retrieved 2026-10-09, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).