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LP2981-33DBVR

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 lp2981-33dbvr: 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
lp2981-33dbvr-etched.fit.json lp2981-33dbvr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
lp2981-33dbvr-etched.glb lp2981-33dbvr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
lp2981-33dbvr-etched.step lp2981-33dbvr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
lp2981-33dbvr-hero.glb Publish 0.2.1 · Ray
lp2981-33dbvr-hero.overlay.json Publish 0.2.1 · Ray
lp2981-33dbvr.glb Publish 0.1.0 · Ray
lp2981-33dbvr.kicad_mod Publish 0.1.0 · Ray
lp2981-33dbvr.kicad_sym Publish 0.1.0 · Ray
lp2981-33dbvr.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
lp2981-33dbvr.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 lp2981-33dbvr: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

LP2981-33DBVR

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

LP2981-33DBVR 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. Accepts 2.2 V to 16 V (continuous absolute max 16 V). Should be bypassed with a 1-µF ceramic capacitor (CIN) close to the pin.
2 GND power_in Ground return for the regulator. Ground pin current (IGND) is typically 600 µA at 100-mA load.
3 ON/OFF input Active-low shutdown pin. Drive high (≥1.6 V over temp) to enable the regulator; drive low (≤0.15 V over temp) to place the device in shutdown (~0.01 µA typical). Must be actively terminated; tie to VIN if unused. Absolute max 16 V; operating range 0 V to VIN.
4 NC unconnected No internal connection. Can be left floating or tied to ground.
5 VOUT power_out Regulated 3.3-V output, 100-mA continuous capability (short-circuit protected, ~150 mA). Requires a minimum 4.7-µF output capacitor (COUT) 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.

  • LP2981-33DBVR
  • LP2981-33DBVRDBVT

CAD (KiCad official)

  • Symbol: LP2981-33DBVR
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: lp2981-33dbvr-etched.step / lp2981-33dbvr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lp2981-33dbvr.step / lp2981-33dbvr.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
lp2981-33dbvr.step 85 KB You want the bare part, or you mark your own boards.
lp2981-33dbvr-etched.step 2.5 MB You want the part with LP2981-33DBVR already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 604 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 (22 pp, sha256 51443d0a50026bd7, 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