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LP3961EMPX-1.8

Public Made by Adom

by adom

Texas Instruments Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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LP3961EMPX-1.8

Texas Instruments · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-5

LP3961EMPX-1.8 from Texas Instruments, in a SOT-223-5. 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 SD input Shutdown input with an operating range of −0.3 V to VIN + 0.3 V, and the datasheet requires it to be pulled high through a 10-kΩ pullup resistor.
2 IN power_in Input supply pin for the regulator, specified for 2.5 V to 7 V operation (survival −0.3 V to 7.5 V), with the minimum operating input equal to VOUT(NOM) + VDROPOUT or 2.5 V, whichever is greater.
3 OUT power_out Regulated output voltage pin, rated for a maximum DC operating current of 0.8 A, short-circuit protected, with survival voltage −0.3 V to 7.5 V.
4 ERROR output ERROR flag output that goes low when the output voltage drops 10% below nominal, with a maximum voltage of VIN + 0.3 V, and it must be pulled high through a 10-kΩ resistor or connected to ground if unused.
5 GND power_in Ground pin for the regulator.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOT-223-5
Category Power Management (PMIC)
Pins 5

CAD (KiCad official)

  • Symbol: LP3961EMPX-1.8
  • Footprint: Package_TO_SOT_SMD:SOT-223-5
  • 3D model: SOT-223-5, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 1.45 mm nominal SOT height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
  • 3D model files: lp3961empx-1-8-etched.step / lp3961empx-1-8-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lp3961empx-1-8.step / lp3961empx-1-8.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (33 pp, sha256 84dbca76243c9a35, retrieved 2026-10-08, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-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