component
LT3973EMSE-3.3#PBF
Public Made by Adomby adom
Analog Devices DC-DC Converters, MSOP-10-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"slug": "lt3973emse-3-3-pbf",
"version": "0.1.0",
"type": "component",
"description": "Analog Devices DC-DC Converters, MSOP-10-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"power management ics",
"lt3973emse-3.3#pbf",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"lt3973emse-3-3-pbf.kicad_sym",
"lt3973emse-3-3-pbf.kicad_mod",
"lt3973emse-3-3-pbf.glb",
"lt3973emse-3-3-pbf.step",
"lt3973emse-3-3-pbf.lbr",
"docs/hero.png",
"docs/lt3973emse-3-3-pbf-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"lt3973emse-3-3-pbf-hero.glb",
"lt3973emse-3-3-pbf-hero.overlay.json",
"lt3973emse-3-3-pbf-etched.glb"
],
"component": {
"mpn": "LT3973EMSE-3.3#PBF",
"manufacturer": "Analog Devices",
"package": "MSOP-10-EP",
"pin_count": 11,
"category": "Power Management ICs",
"subcategory": "DC-DC Converters",
"datasheet": "https://www.analog.com/media/en/technical-documentation/data-sheets/3973fb.pdf",
"parts": {
"symbol": "lt3973emse-3-3-pbf.kicad_sym",
"footprint": "lt3973emse-3-3-pbf.kicad_mod",
"model_3d": "lt3973emse-3-3-pbf-hero.glb",
"model_3d_plain": "lt3973emse-3-3-pbf-etched.glb",
"model_3d_step": "lt3973emse-3-3-pbf-etched.step",
"model_3d_step_plain": "lt3973emse-3-3-pbf.step",
"lbr": "lt3973emse-3-3-pbf.lbr"
},
"distributor_links": {
"lcsc": "C107926",
"digikey": "LT3973EMSE-3.3#PBF-ND",
"mouser": "584-3973EMSE-3.3PBF"
},
"distributor_check": {
"checked_at": "2026-10-30T18:59:54Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "LT3973EMSE-3.3#PBF-ND",
"status": "found"
},
"mouser": {
"pn": "584-3973EMSE-3.3PBF",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "VOUT",
"type": "input",
"description": "For the LT3973-3.3, this pin connects to the internal feedback divider that programs the fixed 3.3V output, and the datasheet gives an absolute maximum of 6V for FB/VOUT."
},
{
"number": "2",
"name": "OUT",
"type": "power_in",
"description": "This pin supplies the VIN-to-VOUT regulation during dropout and sources current to charge the boost capacitor, and it must be tied to GND if the programmed output is greater than 14V (OUT absolute maximum is 14V)."
},
{
"number": "3",
"name": "EN/UVLO",
"type": "input",
"description": "The part is in shutdown when this pin is low and active when high, with a 1.19V rising threshold and 30mV hysteresis, and the absolute maximum rating is 42V; ground it to shut down the part if VIN is below 4.2V."
},
{
"number": "4",
"name": "VIN",
"type": "power_in",
"description": "This pin supplies the internal circuitry and internal power switch and must be locally bypassed, with an operating input range of 4.2V to 42V and an absolute maximum of 42V."
},
{
"number": "5",
"name": "GND",
"type": "power_in",
"description": "This is the ground pin and must be connected to the same ground as the exposed pad (pin 11), which must be soldered to the PCB."
},
{
"number": "6",
"name": "SW",
"type": "output",
"description": "This pin is the output of the internal power switch and connects to the inductor."
},
{
"number": "7",
"name": "BOOST",
"type": "power_in",
"description": "This pin provides a drive voltage higher than VIN to the internal NPN power switch, with absolute maximum limits of 55V on BOOST and 25V BOOST above SW."
},
{
"number": "8",
"name": "BD",
"type": "power_in",
"description": "This pin is the anode connection of the boost diode and supplies current to the internal regulator when BD is above 3.2V, with an absolute maximum of 25V."
},
{
"number": "9",
"name": "PG",
"type": "output",
"description": "This is the open-drain power good output that stays low until FB is within 10% of the regulation voltage, is valid when VIN is above 4.2V and EN/UVLO is high, and has an absolute maximum of 6V."
},
{
"number": "10",
"name": "RT",
"type": "passive",
"description": "A resistor from this pin to ground sets the switching frequency, which the datasheet specifies over a 200kHz to 2.2MHz range."
},
{
"number": "11",
"name": "GND",
"type": "power_in",
"description": "The exposed pad is ground and must be soldered to the PCB for electrical connection and thermal dissipation."
}
],
"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: Pin 1 is named VOUT for the LT3973-3.3 variant (it is FB only on the adjustable LT3973); the pinout ; The exposed pad is listed as pin 11 (GND) in the datasheet, which is outside the 1..10 leaded number; KiCad ERC types for OUT, SW, BOOST, BD and PG were chosen from the functional descriptions because t"
],
"pages_sent": 10,
"cost_usd": 0.056,
"at": "2026-10-30T18:59:40"
},
"datasheet": {
"url": "https://www.analog.com/media/en/technical-documentation/data-sheets/3973fb.pdf",
"pages": 24,
"sha256": "8b84083bfbac6278",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 11,
"described": 11,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "lt3973emse-3-3-pbf.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
4.9,
3.0,
0.95
],
"zmin_mm": -0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "18605eed706df7bb9674107abe7aa36e0ba163a09c21a2cee6c75cfa291b7937",
"checked": "2026-10-30",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "lt3973emse-3-3-pbf-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
4.9,
3.0,
0.95
],
"zmin_mm": -0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "cfde3f00821212d748cc1870849f68b6bc81e56d614feb975f70b0697b629671",
"checked": "2026-10-30",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
],
"package_dims": {
"package_code": "MSE",
"source_page": 22,
"e": {
"nom_mm": 0.5,
"range_mm": [
null,
null
]
},
"A": {
"nom_mm": 1.1,
"range_mm": [
null,
1.1
]
},
"source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
"model_check": {
"file": "lt3973emse-3-3-pbf.step",
"verdict": "PASS",
"reasons": [
"height within the datasheet's package drawing"
],
"by": "factory/package_fit.py"
}
}
}
}