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LP2981A-50DBVR

Public Made by Adom

by adom

Texas Instruments Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs lp2981a-50dbvr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
lp2981a-50dbvr-etched.fit.json lp2981a-50dbvr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
lp2981a-50dbvr-etched.glb lp2981a-50dbvr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
lp2981a-50dbvr-etched.step lp2981a-50dbvr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
lp2981a-50dbvr-hero.glb Publish 0.2.1 · Ray
lp2981a-50dbvr-hero.overlay.json Publish 0.2.1 · Ray
lp2981a-50dbvr.glb Publish 0.1.0 · Ray
lp2981a-50dbvr.kicad_mod Publish 0.1.0 · Ray
lp2981a-50dbvr.kicad_sym Publish 0.1.0 · Ray
lp2981a-50dbvr.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect an… · Ray
lp2981a-50dbvr.step Publish 0.1.0 · Ray
package.json Publish 0.2.1 · Ray
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
page.json Publish 0.2.1 · Ray
README.md lp2981a-50dbvr: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

LP2981A-50DBVR

Texas Instruments · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5

LP2981A-50DBVR from Texas Instruments, in a SOT-23-5. 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 Supply input. Recommended operating range 2.2 V to 16 V (absolute max 16 V). A ≥1 µF input capacitor is recommended.
2 GND power_in Device ground reference. Ground pin current is typically 200 µA at 25 mA load and 600 µA at 100 mA load.
3 ON/OFF input Active-low shutdown control input. Drive high (>1.6 V) to enable the regulator; drive low (<0.15 V) to shut down (IQ ≈ 0.01 µA). Must be actively terminated; tie to VIN if unused. Absolute max 16 V.
4 NC unconnected No connect. Leave floating or tie to ground; no internal connection.
5 VOUT power_out Regulated 5.0-V output, 100 mA continuous (short-circuit protected, ~150 mA current limit). Requires a 4.7 µF output capacitor for stability.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOT-23-5
Category PMIC
Pins 5

Ordering variants

Same part, different packaging or reel option.

  • LP2981A-50DBVR
  • LP2981A-50DBVRDBVT

CAD (KiCad official)

  • Symbol: LP2981A-50DBVR
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: lp2981a-50dbvr-etched.step / lp2981a-50dbvr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lp2981a-50dbvr.step / lp2981a-50dbvr.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
lp2981a-50dbvr.step 85 KB You want the bare part, or you mark your own boards.
lp2981a-50dbvr-etched.step 2.5 MB You want the part with LP2981A-50DBVR already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 605 faces against 102 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: Texas Instruments datasheet (23 pp, sha256 ad245dedca86e10b, retrieved 2026-08-17, tier: lcsc)
  • 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