component
LM25117PMHX
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Texas Instruments DC-DC Converters, HTSSOP-20-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+58@@ -0,0 +1,58 @@+# LM25117PMHX++**Texas Instruments** · DC-DC Converters · HTSSOP-20-EP++LM25117PMHX from Texas Instruments, in a HTSSOP-20-EP. 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 | UVLO | input | Under-voltage lockout programming pin; regulator enters shutdown mode below 0.4V, standby mode between 0.4V and 1.25V, or normal operation above 1.25V threshold. |+| 2 | DEMB | input | Diode emulation mode control input; pull low or leave floating to enable diode emulation with reverse current blocking, or pull high to disable continuous conduction. |+| 3 | RES | input | Restart timer capacitor pin for discontinuous mode current limiting; determines restart delay after 256 consecutive PWM cycles of current limiting. |+| 4 | SS | input | Soft-start capacitor connection charged by internal 10µA sink current; controls error amplifier reference voltage ramp slope during startup sequence. |+| 5 | RT | input | Oscillator timing pin connected to external resistor to program switching frequency (50kHz to 750kHz) or AC-coupled to external clock for synchronization. |+| 6 | AGND | power_in | Analog ground return path for internal 0.8V reference circuit and all analog circuit grounds. |+| 7 | VCCDIS | input | VCC regulator disable control input; internal regulator disabled when voltage exceeds 1.25V threshold to enable external bias supply operation. |+| 8 | FB | input | Feedback input to inverting terminal of error amplifier; adjustable reference threshold is 0.8V, receives output voltage divider signal for regulation. |+| 9 | COMP | output | Error amplifier output; connects to feedback compensation network (RCOMP, CCOMP, CHF) and PWM comparator for loop compensation. |+| 10 | CM | output | Current monitor output providing average inductor current information; output gain 20.5V/V typical, bandwidth approximately fSW/10. |+| 11 | RAMP | output | PWM ramp signal output for slope compensation; external RRAMP (SW to RAMP) and CRAMP (RAMP to AGND) set inductor current slope compensation. |+| 12 | CS | input | Current sense amplifier input connected to high-side of external current sense resistor; detects peak inductor current for cycle-by-cycle limiting. |+| 13 | CSG | input | Kelvin return connection to current sense resistor low-side; must be directly connected to low-side of sense resistor for accurate current measurement. |+| 14 | PGND | power_in | Power ground return for low-side NMOS gate driver; direct connection to low-side MOSFET source and current sense resistor low-side. |+| 15 | LO | output | Low-side NMOS gate driver output; drives external low-side synchronous MOSFET gate via short low-inductance path, peak current ±3.3A. |+| 16 | VCC | power_in | Bias supply voltage input regulated to 7.6V; decoupled with 0.47µF to 10µF capacitor placed close to IC for gate driver and logic supply. |+| 17 | SW | output | Buck regulator switch node connecting high-side MOSFET source, low-side MOSFET drain, bootstrap capacitor, and serving as ramp voltage reference. |+| 18 | HO | output | High-side NMOS gate driver output; drives external high-side MOSFET gate via short low-inductance path, peak current ±3.3A, voltage swing from SW to HB. |+| 19 | HB | power_out | Bootstrap power supply for high-side gate driver; connected to bootstrap capacitor (≥0.1µF) and external bootstrap diode cathode. |+| 20 | VIN | power_in | VCC regulator power supply input accepting 4.5V to 42V; provides internal bias regulation and high-voltage startup current source. |+| 21 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | HTSSOP-20-EP |+| Category | Power Management (PMIC) |+| Pins | 21 |++## CAD (KiCad official)++- Symbol: `LM25117PMHX`+- Footprint: `Package_SO:TSSOP-20-1EP_4.4x6.5mm_P0.65mm_EP2.15x3.35mm`+- 3D model: HTSSOP-20-EP, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 1.2 mm nominal TSSOP 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: `lm25117pmhx-etched.step` / `lm25117pmhx-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm25117pmhx.step` / `lm25117pmhx.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/lm25117-q1) (39 pp, sha256 `ebaf723e350b87ed`, retrieved 2026-10-01, 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-5-5` (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/lm25117pmhx-datasheet.pdf)
page.jsonadded+231@@ -0,0 +1,231 @@+{+ "slug": "lm25117pmhx",+ "version": "0.1.0",+ "type": "component",+ "description": "Texas Instruments DC-DC Converters, HTSSOP-20-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "power management (pmic)",+ "lm25117pmhx",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "lm25117pmhx.kicad_sym",+ "lm25117pmhx.kicad_mod",+ "lm25117pmhx.glb",+ "lm25117pmhx.step",+ "lm25117pmhx.lbr",+ "docs/hero.png",+ "docs/lm25117pmhx-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ],+ "component": {+ "mpn": "LM25117PMHX",+ "manufacturer": "Texas Instruments",+ "package": "HTSSOP-20-EP",+ "pin_count": 21,+ "category": "Power Management (PMIC)",+ "subcategory": "DC-DC Converters",+ "datasheet": "https://www.ti.com/cn/lit/gpn/lm25117-q1",+ "parts": {+ "symbol": "lm25117pmhx.kicad_sym",+ "footprint": "lm25117pmhx.kicad_mod",+ "model_3d": "lm25117pmhx-etched.glb",+ "model_3d_plain": "lm25117pmhx.glb",+ "model_3d_step": "lm25117pmhx-etched.step",+ "model_3d_step_plain": "lm25117pmhx.step",+ "lbr": "lm25117pmhx.lbr"+ },+ "distributor_links": {+ "lcsc": "C2870667"+ },+ "distributor_check": {+ "checked_at": "2026-10-01T17:37:32Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": null,+ "status": "no match"+ },+ "mouser": {+ "pn": null,+ "status": "no match"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "UVLO",+ "type": "input",+ "description": "Under-voltage lockout programming pin; regulator enters shutdown mode below 0.4V, standby mode between 0.4V and 1.25V, or normal operation above 1.25V threshold."+ },+ {+ "number": "2",+ "name": "DEMB",+ "type": "input",+ "description": "Diode emulation mode control input; pull low or leave floating to enable diode emulation with reverse current blocking, or pull high to disable continuous conduction."+ },+ {+ "number": "3",+ "name": "RES",+ "type": "input",+ "description": "Restart timer capacitor pin for discontinuous mode current limiting; determines restart delay after 256 consecutive PWM cycles of current limiting."+ },+ {+ "number": "4",+ "name": "SS",+ "type": "input",+ "description": "Soft-start capacitor connection charged by internal 10µA sink current; controls error amplifier reference voltage ramp slope during startup sequence."+ },+ {+ "number": "5",+ "name": "RT",+ "type": "input",+ "description": "Oscillator timing pin connected to external resistor to program switching frequency (50kHz to 750kHz) or AC-coupled to external clock for synchronization."+ },+ {+ "number": "6",+ "name": "AGND",+ "type": "power_in",+ "description": "Analog ground return path for internal 0.8V reference circuit and all analog circuit grounds."+ },+ {+ "number": "7",+ "name": "VCCDIS",+ "type": "input",+ "description": "VCC regulator disable control input; internal regulator disabled when voltage exceeds 1.25V threshold to enable external bias supply operation."+ },+ {+ "number": "8",+ "name": "FB",+ "type": "input",+ "description": "Feedback input to inverting terminal of error amplifier; adjustable reference threshold is 0.8V, receives output voltage divider signal for regulation."+ },+ {+ "number": "9",+ "name": "COMP",+ "type": "output",+ "description": "Error amplifier output; connects to feedback compensation network (RCOMP, CCOMP, CHF) and PWM comparator for loop compensation."+ },+ {+ "number": "10",+ "name": "CM",+ "type": "output",+ "description": "Current monitor output providing average inductor current information; output gain 20.5V/V typical, bandwidth approximately fSW/10."+ },+ {+ "number": "11",+ "name": "RAMP",+ "type": "output",+ "description": "PWM ramp signal output for slope compensation; external RRAMP (SW to RAMP) and CRAMP (RAMP to AGND) set inductor current slope compensation."+ },+ {+ "number": "12",+ "name": "CS",+ "type": "input",+ "description": "Current sense amplifier input connected to high-side of external current sense resistor; detects peak inductor current for cycle-by-cycle limiting."+ },+ {+ "number": "13",+ "name": "CSG",+ "type": "input",+ "description": "Kelvin return connection to current sense resistor low-side; must be directly connected to low-side of sense resistor for accurate current measurement."+ },+ {+ "number": "14",+ "name": "PGND",+ "type": "power_in",+ "description": "Power ground return for low-side NMOS gate driver; direct connection to low-side MOSFET source and current sense resistor low-side."+ },+ {+ "number": "15",+ "name": "LO",+ "type": "output",+ "description": "Low-side NMOS gate driver output; drives external low-side synchronous MOSFET gate via short low-inductance path, peak current ±3.3A."+ },+ {+ "number": "16",+ "name": "VCC",+ "type": "power_in",+ "description": "Bias supply voltage input regulated to 7.6V; decoupled with 0.47µF to 10µF capacitor placed close to IC for gate driver and logic supply."+ },+ {+ "number": "17",+ "name": "SW",+ "type": "output",+ "description": "Buck regulator switch node connecting high-side MOSFET source, low-side MOSFET drain, bootstrap capacitor, and serving as ramp voltage reference."+ },+ {+ "number": "18",+ "name": "HO",+ "type": "output",+ "description": "High-side NMOS gate driver output; drives external high-side MOSFET gate via short low-inductance path, peak current ±3.3A, voltage swing from SW to HB."+ },+ {+ "number": "19",+ "name": "HB",+ "type": "power_out",+ "description": "Bootstrap power supply for high-side gate driver; connected to bootstrap capacitor (≥0.1µF) and external bootstrap diode cathode."+ },+ {+ "number": "20",+ "name": "VIN",+ "type": "power_in",+ "description": "VCC regulator power supply input accepting 4.5V to 42V; provides internal bias regulation and high-voltage startup current source."+ },+ {+ "number": "21",+ "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-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [],+ "pages_sent": 39,+ "cost_usd": 0.3304,+ "at": "2026-10-01T17:37:09"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/lm25117-q1",+ "pages": 39,+ "sha256": "ebaf723e350b87ed",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 21,+ "described": 21,+ "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]"+ }+}