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LM317LD

Public Made by Adom

by 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.

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LM317LD

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm317ld.step / lm317ld.glb are 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, primary claude-sonnet-5-5 (text+vision), consensus claude-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).

Datasheet PDF