component
LM2991SX
Public Made by Adomby 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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README.mdadded+42@@ -0,0 +1,42 @@+# 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](https://www.ti.com/cn/lit/gpn/lm2991) (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](docs/lm2991sx-datasheet.pdf)
page.jsonadded+132@@ -0,0 +1,132 @@+{+ "slug": "lm2991sx",+ "version": "0.1.0",+ "type": "component",+ "description": "Texas Instruments Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-263-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "power management (pmic)",+ "lm2991sx",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "lm2991sx.kicad_sym",+ "lm2991sx.kicad_mod",+ "lm2991sx.glb",+ "lm2991sx.step",+ "lm2991sx.lbr",+ "docs/hero.png",+ "docs/lm2991sx-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ],+ "component": {+ "mpn": "LM2991SX",+ "manufacturer": "Texas Instruments",+ "package": "TO-263-5",+ "pin_count": 6,+ "category": "Power Management (PMIC)",+ "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",+ "datasheet": "https://www.ti.com/cn/lit/gpn/lm2991",+ "parts": {+ "symbol": "lm2991sx.kicad_sym",+ "footprint": "lm2991sx.kicad_mod",+ "model_3d": "lm2991sx-etched.glb",+ "model_3d_plain": "lm2991sx.glb",+ "model_3d_step": "lm2991sx-etched.step",+ "model_3d_step_plain": "lm2991sx.step",+ "lbr": "lm2991sx.lbr"+ },+ "distributor_links": {+ "lcsc": "C201552"+ },+ "pins": [+ {+ "number": "1",+ "name": "ADJ",+ "type": "input",+ "description": "Feedback pin to the control loop for programming the output voltage."+ },+ {+ "number": "2",+ "name": "ON/OFF",+ "type": "input",+ "description": "TTL/CMOS compatible ON/OFF input to enable (low) or disable (high, minimum 2.4 V at temperature extremes) the regulator output."+ },+ {+ "number": "3",+ "name": "IN",+ "type": "power_in",+ "description": "Negative input voltage supply operating from −26 V to −6 V, internally connected to thermal tab."+ },+ {+ "number": "4",+ "name": "GND",+ "type": "power_in",+ "description": "Ground reference."+ },+ {+ "number": "5",+ "name": "OUT",+ "type": "power_out",+ "description": "Regulated negative output voltage from −3 V to −24 V, typical range −2 V to −25 V, with maximum load current of 1 A."+ },+ {+ "number": "6",+ "name": "EP",+ "type": "passive",+ "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.2",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.2",+ "primary_model": "claude-haiku-4-5-20251001",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "exposed pad 6 added from the footprint",+ "dropped thermal pad ['EP'] absent from footprint"+ ],+ "pages_sent": 28,+ "cost_usd": 0.2338,+ "at": "2026-09-23T19:59:47"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/lm2991",+ "pages": 28,+ "sha256": "a1c687953da1d6a9",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 6,+ "described": 6,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ }+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}