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LM2991SX

Public Made by Adom

by adom

Texas Instruments Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-263-5. Pinout cross-checked by two models against 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 lm2991sx: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 24d ago
viewers lm2991sx: viewers · Ray 1mo ago
lm2991sx-etched.fit.json lm2991sx: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
lm2991sx-etched.glb lm2991sx: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 24d ago
lm2991sx-etched.step lm2991sx: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 24d ago
lm2991sx.glb Publish 0.1.0 · Ray 1mo ago
lm2991sx.kicad_mod Publish 0.1.0 · Ray 1mo ago
lm2991sx.kicad_sym Publish 0.1.0 · Ray 1mo ago
lm2991sx.lbr Publish 0.1.0 · Ray 1mo ago
lm2991sx.step Publish 0.1.0 · Ray 1mo ago
package.json lm2991sx: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 24d ago
page.json lm2991sx: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 24d ago
README.md Initial commit: component/lm2991sx · Ray 1mo ago

LM2991SX

Texas Instruments · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-263-5

LM2991SX from Texas Instruments, in a TO-263-5. 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 ADJ input Feedback pin to the control loop for programming the output voltage.
2 ON/OFF input TTL/CMOS compatible ON/OFF input to enable (low) or disable (high, minimum 2.4 V at temperature extremes) the regulator output.
3 IN power_in Negative input voltage supply operating from −26 V to −6 V, internally connected to thermal tab.
4 GND power_in Ground reference.
5 OUT power_out Regulated negative output voltage from −3 V to −24 V, typical range −2 V to −25 V, with maximum load current of 1 A.
6 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package TO-263-5
Category Power Management (PMIC)
Pins 6

CAD (KiCad official)

  • Symbol: LM2991SX
  • Footprint: Package_TO_SOT_SMD:TO-263-5_TabPin6
  • 3D model: TO-263-5 (KiCad packages3D, STEP)
  • 3D model files: lm2991sx-etched.step / lm2991sx-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm2991sx.step / lm2991sx.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (28 pp, sha256 a1c687953da1d6a9, retrieved 2026-09-23, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-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