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LM51551QDSSRQ1
Public Made by Adomby adom
Texas Instruments DC-DC Converters, WSON-12-EP(2x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+50@@ -0,0 +1,50 @@+# LM51551QDSSRQ1++**Texas Instruments** · DC-DC Converters · WSON-12-EP(2x3)++LM51551QDSSRQ1 from Texas Instruments, in a WSON-12-EP(2x3). 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 | BIAS | power_in | Power supply input to VCC regulator operating from 2.97V to 45V with bypass capacitor to PGND. |+| 2 | VCC | power_out | Regulated power output from internal VCC regulator at 6.5V to 7V nominal supplying MOSFET driver with ceramic bypass capacitor to PGND. |+| 3 | GATE | output | N-channel MOSFET gate driver output with 1.5A peak current capability connected via short low-inductance path to MOSFET gate. |+| 4 | PGND | power_in | Power ground reference connected via wide short low-inductance path to current sense resistor ground. |+| 5 | CS | input | Current sense input for peak current mode control connected via short path to positive side of current sense resistor with 100mV threshold. |+| 6 | COMP | output | Transconductance error amplifier output with 10MΩ impedance and 7MHz bandwidth with loop compensation network connected between this pin and PGND. |+| 7 | AGND | power_in | Analog ground reference with wide short path connection required to analog ground plane. |+| 8 | FB | input | Error amplifier feedback input with 1V ±1% reference, voltage divider from output connected to set target output voltage in boost/SEPIC topologies. |+| 9 | SS | input | Soft-start programming pin with external capacitor and 10μA internal current source for setting startup ramp rate, capacitor ground to AGND. |+| 10 | RT | input | Switch frequency programming pin regulated to 0.5V, single external resistor to AGND programs switching frequency from 100kHz to 2.2MHz. |+| 11 | PGOOD | output | Open-drain power good indicator output goes low if feedback drops below 90% of 1V reference with 25μs glitch filter and pull-up resistor to system voltage. |+| 12 | UVLO/SYNC | input | UVLO threshold programming and enable/sync control pin from 0V to VBIAS+0.3V via resistor divider, supports external clock synchronization via negative pulse, do not leave floating. |+| 13 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | WSON-12-EP(2x3) |+| Category | Power Management (PMIC) |+| Pins | 13 |++## CAD (KiCad official)++- Symbol: `LM51551QDSSRQ1`+- Footprint: `Package_SON:WSON-12-1EP_3x2mm_P0.5mm_EP1x2.65`+- 3D model: WSON-12-EP(2x3), generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.75 mm nominal WSON 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: `lm51551qdssrq1-etched.step` / `lm51551qdssrq1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm51551qdssrq1.step` / `lm51551qdssrq1.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/lm5155-q1) (50 pp, sha256 `a8503f9fa4bec785`, retrieved 2026-10-05, 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 0.3`, primary `claude-haiku-4-5-20251001` (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/lm51551qdssrq1-datasheet.pdf)
page.jsonadded+191@@ -0,0 +1,191 @@+{+ "slug": "lm51551qdssrq1",+ "version": "0.1.0",+ "type": "component",+ "description": "Texas Instruments DC-DC Converters, WSON-12-EP(2x3). 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not named in the datasheet pin table)."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.3",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.3",+ "primary_model": "claude-haiku-4-5-20251001",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "exposed pad 13 added from the footprint",+ "dropped thermal pad ['EP'] absent from footprint"+ ],+ "pages_sent": 29,+ "cost_usd": 0.2336,+ "at": "2026-10-05T19:53:14"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/lm5155-q1",+ "pages": 50,+ "sha256": "a8503f9fa4bec785",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 13,+ "described": 13,+ "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]"+ }+}