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LP3981IMM-3.03
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Texas Instruments Linear Voltage Regulators (LDO), VSSOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+44@@ -0,0 +1,44 @@+# LP3981IMM-3.03++**Texas Instruments** · Linear Voltage Regulators (LDO) · VSSOP-8++LP3981IMM-3.03 from Texas Instruments, in a VSSOP-8. 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 | OUT | power_out | Output voltage of the LDO, rated for 300-mA output current with the datasheet's maximum OUT/OUT-SENSE voltage of VIN + 0.3 V (6.5 V absolute maximum). |+| 2 | IN | power_in | Input voltage of the LDO, specified for 2.7 V to 6 V recommended operation with an absolute maximum of 6.5 V. |+| 3 | NC | unconnected | No internal connection. |+| 4 | OUT-SENSE | output | Voltage sense pin that must be connected to OUT for proper operation. |+| 5 | GND | power_in | Common ground pin; the datasheet's 'connect to PAD' note refers to the WSON thermal pad and does not apply to the VSSOP package. |+| 6 | BYPASS | passive | Optional bypass capacitor connection for noise reduction, connected to a high-impedance reference node so DC leakage on this pin must be kept low. |+| 7 | EN | input | Enable input logic, enable high; recommended range is 0 V to VIN. |+| 8 | NC | unconnected | No internal connection. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | VSSOP-8 |+| Category | Power Supply Chip |+| Pins | 8 |++## CAD (KiCad official)++- Symbol: `LP3981IMM-3.03`+- Footprint: `Package_SO:VSSOP-8_2.3x2mm_P0.5mm`+- 3D model: VSSOP-8 (KiCad packages3D, STEP)+- 3D model files: `lp3981imm-3-03-etched.step` / `lp3981imm-3-03-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lp3981imm-3-03.step` / `lp3981imm-3-03.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/lp3981) (27 pp, sha256 `f55a271103f3d9d3`, 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](docs/lp3981imm-3-03-datasheet.pdf)
page.jsonadded+201@@ -0,0 +1,201 @@+{+ "slug": "lp3981imm-3-03",+ "version": "0.1.0",+ "type": "component",+ "description": "Texas Instruments Linear Voltage Regulators (LDO), VSSOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "power supply chip",+ "lp3981imm-3.03",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "lp3981imm-3-03.kicad_sym",+ "lp3981imm-3-03.kicad_mod",+ "lp3981imm-3-03.glb",+ "lp3981imm-3-03.step",+ "lp3981imm-3-03.lbr",+ "docs/hero.png",+ "docs/lp3981imm-3-03-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html",+ "lp3981imm-3-03-hero.glb",+ "lp3981imm-3-03-hero.overlay.json"+ ],+ "component": {+ "mpn": "LP3981IMM-3.03",+ "manufacturer": "Texas Instruments",+ "package": "VSSOP-8",+ "pin_count": 8,+ "category": "Power Supply Chip",+ "subcategory": "Linear Voltage Regulators (LDO)",+ "datasheet": "https://www.ti.com/cn/lit/gpn/lp3981",+ "parts": {+ "symbol": "lp3981imm-3-03.kicad_sym",+ "footprint": "lp3981imm-3-03.kicad_mod",+ "model_3d": "lp3981imm-3-03-hero.glb",+ "model_3d_plain": "lp3981imm-3-03.glb",+ "model_3d_step": "lp3981imm-3-03-etched.step",+ "model_3d_step_plain": "lp3981imm-3-03.step",+ "lbr": "lp3981imm-3-03.lbr"+ },+ "distributor_links": {+ "lcsc": "C2866773",+ "digikey": "2156-LP3981IMM-3.03-14-ND",+ "mouser": "926-LP3981IMM-303"+ },+ "distributor_check": {+ "checked_at": "2026-10-08T16:42:49Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": "2156-LP3981IMM-3.03-14-ND",+ "status": "found",+ "lifecycle": "Active"+ },+ "mouser": {+ "pn": "926-LP3981IMM-303",+ "status": "found",+ "lifecycle": "Obsolete"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "OUT",+ "type": "power_out",+ "description": "Output voltage of the LDO, rated for 300-mA output current with the datasheet's maximum OUT/OUT-SENSE voltage of VIN + 0.3 V (6.5 V absolute maximum)."+ },+ {+ "number": "2",+ "name": "IN",+ "type": "power_in",+ "description": "Input voltage of the LDO, specified for 2.7 V to 6 V recommended operation with an absolute maximum of 6.5 V."+ },+ {+ "number": "3",+ "name": "NC",+ "type": "unconnected",+ "description": "No internal connection."+ },+ {+ "number": "4",+ "name": "OUT-SENSE",+ "type": "output",+ "description": "Voltage sense pin that must be connected to OUT for proper operation."+ },+ {+ "number": "5",+ "name": "GND",+ "type": "power_in",+ "description": "Common ground pin; the datasheet's 'connect to PAD' note refers to the WSON thermal pad and does not apply to the VSSOP package."+ },+ {+ "number": "6",+ "name": "BYPASS",+ "type": "passive",+ "description": "Optional bypass capacitor connection for noise reduction, connected to a high-impedance reference node so DC leakage on this pin must be kept low."+ },+ {+ "number": "7",+ "name": "EN",+ "type": "input",+ "description": "Enable input logic, enable high; recommended range is 0 V to VIN."+ },+ {+ "number": "8",+ "name": "NC",+ "type": "unconnected",+ "description": "No internal connection."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.3",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.3",+ "primary_model": "claude-haiku-5-5",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "extractor flagged: The datasheet says GND should 'Connect to PAD' and the 'THERMAL PAD' row applies to the WSON package; The datasheet classifies OUT-SENSE as type O (output), although it functions as a voltage sense inpu; The datasheet classifies IN as type I; it is typed here as power_in because it is the LDO supply inp"+ ],+ "pages_sent": 10,+ "cost_usd": 0.0671,+ "at": "2026-10-08T16:42:26"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/lp3981",+ "pages": 27,+ "sha256": "f55a271103f3d9d3",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 8,+ "described": 8,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ },+ "models_3d": [+ {+ "file": "lp3981imm-3-03.step",+ "role": "plain",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 3.1,+ 2,+ 0.85+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "353552981eef35cb93635057d4aeb89aef22648c77af6fd095e328bfe6b834bd",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "lp3981imm-3-03-etched.step",+ "role": "eda",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 3.1,+ 2,+ 0.85+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "8d78d7fa5d32d253d27da7d8260b3d63cdaaccd40b57a349eec5a382eab7b703",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ }+ ]+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}