component
LMR33640DDDAR
Public Made by Adomby adom
Texas Instruments DC-DC Converters, SOIC-8-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+46@@ -0,0 +1,46 @@+# LMR33640DDDAR++**Texas Instruments** · DC-DC Converters · SOIC-8-EP++LMR33640DDDAR from Texas Instruments, in a SOIC-8-EP. 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 | PGND | power_in | Power ground terminal; connect to system ground, AGND, and bypass capacitor with short wide traces. |+| 2 | VIN | power_in | Regulator input supply operating from 3.8 V to 36 V; connect high-quality bypass capacitors directly to this pin and PGND. |+| 3 | EN | input | Enable control input with rising threshold of 1.26 V enabling switching and falling threshold of 0.3 V disabling device; do not float. |+| 4 | PG | tri_state | Open-drain power-good output indicating regulation status with upper threshold at 107% of FB and lower at 94% of FB; pulls low on fault or during soft start. |+| 5 | FB | input | Feedback input connected to output voltage divider tap point with nominal reference voltage of 1 V; do not float or ground. |+| 6 | VCC | power_out | Internal 5-V LDO output regulated from 4.75 V to 5.25 V supplying internal control circuits; connect 1-µF capacitor to PGND and do not load externally. |+| 7 | BOOT | power_out | Bootstrap supply for internal high-side gate driver with minimum undervoltage threshold of 2.2 V; connect 100-nF capacitor from this pin to SW. |+| 8 | SW | output | Switching node driven by internal MOSFETs with voltage rating from -0.3 V to 38 V, supporting transients to -3.5 V under 100 ns; connect to power inductor. |+| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-8-EP |+| Category | Power Management (PMIC) |+| Pins | 9 |++## CAD (KiCad official)++- Symbol: `LMR33640DDDAR`+- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm`+- 3D model: SOIC-8-EP (KiCad packages3D, STEP)+- 3D model files: `lmr33640dddar-etched.step` / `lmr33640dddar-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lmr33640dddar.step` / `lmr33640dddar.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/lmr33640) (44 pp, sha256 `6df39cb52faaed45`, retrieved 2026-09-23, tier: lcsc)+- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.+- **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/lmr33640dddar-datasheet.pdf)
page.jsonadded+151@@ -0,0 +1,151 @@+{+ "slug": "lmr33640dddar",+ "version": "0.1.0",+ "type": "component",+ "description": "Texas Instruments DC-DC Converters, SOIC-8-EP. Datasheet-verified pinout, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "power management (pmic)",+ "lmr33640dddar",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "lmr33640dddar.kicad_sym",+ "lmr33640dddar.kicad_mod",+ "lmr33640dddar.glb",+ "lmr33640dddar.step",+ "lmr33640dddar.lbr",+ "docs/hero.png",+ "docs/lmr33640dddar-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ],+ "component": {+ "mpn": "LMR33640DDDAR",+ "manufacturer": "Texas Instruments",+ "package": "SOIC-8-EP",+ "pin_count": 9,+ "category": "Power Management (PMIC)",+ "subcategory": "DC-DC Converters",+ "datasheet": "https://www.ti.com/cn/lit/gpn/lmr33640",+ "parts": {+ "symbol": "lmr33640dddar.kicad_sym",+ "footprint": "lmr33640dddar.kicad_mod",+ "model_3d": "lmr33640dddar-etched.glb",+ "model_3d_plain": "lmr33640dddar.glb",+ "model_3d_step": "lmr33640dddar-etched.step",+ "model_3d_step_plain": "lmr33640dddar.step",+ "lbr": "lmr33640dddar.lbr"+ },+ "distributor_links": {+ "lcsc": "C1852154"+ },+ "pins": [+ {+ "number": "1",+ "name": "PGND",+ "type": "power_in",+ "description": "Power ground terminal; connect to system ground, AGND, and bypass capacitor with short wide traces."+ },+ {+ "number": "2",+ "name": "VIN",+ "type": "power_in",+ "description": "Regulator input supply operating from 3.8 V to 36 V; connect high-quality bypass capacitors directly to this pin and PGND."+ },+ {+ "number": "3",+ "name": "EN",+ "type": "input",+ "description": "Enable control input with rising threshold of 1.26 V enabling switching and falling threshold of 0.3 V disabling device; do not float."+ },+ {+ "number": "4",+ "name": "PG",+ "type": "tri_state",+ "description": "Open-drain power-good output indicating regulation status with upper threshold at 107% of FB and lower at 94% of FB; pulls low on fault or during soft start."+ },+ {+ "number": "5",+ "name": "FB",+ "type": "input",+ "description": "Feedback input connected to output voltage divider tap point with nominal reference voltage of 1 V; do not float or ground."+ },+ {+ "number": "6",+ "name": "VCC",+ "type": "power_out",+ "description": "Internal 5-V LDO output regulated from 4.75 V to 5.25 V supplying internal control circuits; connect 1-µF capacitor to PGND and do not load externally."+ },+ {+ "number": "7",+ "name": "BOOT",+ "type": "power_out",+ "description": "Bootstrap supply for internal high-side gate driver with minimum undervoltage threshold of 2.2 V; connect 100-nF capacitor from this pin to SW."+ },+ {+ "number": "8",+ "name": "SW",+ "type": "output",+ "description": "Switching node driven by internal MOSFETs with voltage rating from -0.3 V to 38 V, supporting transients to -3.5 V under 100 ns; connect to power inductor."+ },+ {+ "number": "9",+ "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": [+ "extractor flagged: AGND thermal pad lacks a standard pin number designation in datasheet; represented as 'PAD' in numbe",+ "exposed pad 9 added from the footprint",+ "dropped thermal pad ['EP'] absent from footprint"+ ],+ "pages_sent": 44,+ "cost_usd": 0.4327,+ "at": "2026-09-23T08:28:20"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/lmr33640",+ "pages": 44,+ "sha256": "6df39cb52faaed45",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 9,+ "described": 9,+ "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]"+ }+}