component
LM25117PMHX
Public Made by Adomby adom
Texas Instruments DC-DC Converters, HTSSOP-20-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"type": "component",
"slug": "lm25117pmhx",
"title": "LM25117PMHX",
"brief": "Texas Instruments DC-DC Converters, HTSSOP-20-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
"license": "CC-BY-SA-4.0",
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"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",
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"distributor_links": {
"lcsc": "C2870667"
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"checked_at": "2026-10-01T17:37:32Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "no match"
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"mouser": {
"pn": null,
"status": "no match"
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},
"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,
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}
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"metadata": {
"specs": {
"Manufacturer": "Texas Instruments",
"Package": "HTSSOP-20-EP",
"Category": "Power Management (PMIC)",
"Pins": "21"
}
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"email": "[email protected]"
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