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LP3985IM5X-3.3

Public Unreviewed

by Ray

Texas Instruments LP3985IM5X 3 3 NOPB Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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LP3985IM5X-3.3

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

LP3985IM5X-3.3 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 IN power_in Input voltage of the LDO. Accepts 2.5 V to 6 V (abs max 6.5 V). Requires a 1-µF input capacitor to GND.
2 GND power_in Common ground reference for the device. All voltages are referenced to this pin.
3 EN input Enable input, active high. VIH ≥ 1.4 V enables the regulator; VIL ≤ 0.4 V places it in shutdown (<1.5 µA IQ). Must not be left floating; range 0 V to VIN.
4 BYPASS passive Optional noise-reduction bypass capacitor node (typically 0.01 µF to GND). Reduces output noise without slowing load transient response; leave open if unused.
5 OUT power_out Regulated 3.3-V output of the LDO. Delivers up to 150 mA continuous; requires a 1-µF ceramic or high-quality tantalum output capacitor to GND 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.

  • LP3985IM5X-3.3
  • LP3985IM5X-3.3ITL-3.3
  • LP3985IM5X-3.3ITLX-3.3

The extractor listed these alongside LP3985IM5X-3.3, but they are different parts with different electrical characteristics. Do not order them as substitutes.

  • LP3985IM5X-3.3IM5-3.3

CAD (KiCad official)

  • Symbol: LP3985IM5X-3.3
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
lp3985im5x-3-3.step 85 KB You want the bare part, or you mark your own boards.
lp3985im5x-3-3-etched.step 2.6 MB You want the part with LP3985IM5X-3.3 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 623 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 (33 pp, sha256 7b66304d9cd4ba89, 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