component
LM3100MHX
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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"description": "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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],
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"component": {
"mpn": "LM3100MHX",
"manufacturer": "Texas Instruments",
"package": "HTSSOP-20-EP",
"pin_count": 21,
"category": "Power Management ICs",
"subcategory": "DC-DC Converters",
"datasheet": "https://www.ti.com/lit/ds/symlink/lm3100mhx.pdf",
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"distributor_links": {
"lcsc": "C187923"
},
"distributor_check": {
"checked_at": "2026-10-22T21:04:24Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "quota"
},
"mouser": {
"pn": null,
"status": "quota"
}
},
"pins": [
{
"number": "1",
"name": "N/C",
"type": "unconnected",
"description": "No connection; this pin must be left unconnected."
},
{
"number": "2",
"name": "SW",
"type": "output",
"description": "Switching node internally connected to the buck switch source; connect to the output inductor."
},
{
"number": "3",
"name": "SW",
"type": "output",
"description": "Switching node internally connected to the buck switch source; connect to the output inductor."
},
{
"number": "4",
"name": "VIN",
"type": "power_in",
"description": "Input supply pin to the device with a nominal input range of 4.5 V to 36 V."
},
{
"number": "5",
"name": "VIN",
"type": "power_in",
"description": "Input supply pin to the device with a nominal input range of 4.5 V to 36 V."
},
{
"number": "6",
"name": "BST",
"type": "passive",
"description": "Bootstrap capacitor connection; connect a 0.033 µF capacitor from SW to this pin, charged by an internal diode during the high-side switch off-time."
},
{
"number": "7",
"name": "GND",
"type": "power_in",
"description": "Analog ground for all internal circuitry other than the synchronous switches."
},
{
"number": "8",
"name": "SS",
"type": "passive",
"description": "Soft-start pin where an internal 8 µA current source charges an external capacitor to provide the soft-start function."
},
{
"number": "9",
"name": "N/C",
"type": "unconnected",
"description": "No connection; this pin must be left unconnected."
},
{
"number": "10",
"name": "N/C",
"type": "unconnected",
"description": "No connection; this pin must be left unconnected."
},
{
"number": "11",
"name": "TST",
"type": "input",
"description": "Test mode enable pin that forces the device into test mode; must be connected to ground for normal operation."
},
{
"number": "12",
"name": "N/C",
"type": "unconnected",
"description": "No connection; this pin must be left unconnected."
},
{
"number": "13",
"name": "FB",
"type": "input",
"description": "Feedback input internally connected to the regulation and over-voltage comparators with a 0.8 V regulation setting; connect to the feedback divider."
},
{
"number": "14",
"name": "EN",
"type": "input",
"description": "Enable pin; connect a voltage higher than 1.26 V to enable the regulator."
},
{
"number": "15",
"name": "RON",
"type": "input",
"description": "On-time control pin where an external resistor from VIN sets the high-side switch on-time."
},
{
"number": "16",
"name": "VCC",
"type": "power_out",
"description": "Start-up regulator output nominally regulated to 6 V; connect a capacitor of not less than 680 nF between VCC and GND."
},
{
"number": "17",
"name": "PGND",
"type": "power_in",
"description": "Power ground at the synchronous rectifier MOSFET source; tie to the power ground plane."
},
{
"number": "18",
"name": "PGND",
"type": "power_in",
"description": "Power ground at the synchronous rectifier MOSFET source; tie to the power ground plane."
},
{
"number": "19",
"name": "N/C",
"type": "unconnected",
"description": "No connection; this pin must be left unconnected."
},
{
"number": "20",
"name": "N/C",
"type": "unconnected",
"description": "No connection; this pin must be left unconnected."
},
{
"number": "21",
"name": "EP",
"type": "passive",
"description": "Exposed pad (from the footprint; 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-sonnet-5-5",
"primary_mode": "text",
"consensus_model": "claude-sonnet-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: The pin-diagram text on page 3 lists names in an order that doesn't match the Pin Functions table (f; The datasheet labels the exposed pad 'DAP/EP' with no numeric pin number, so I used 'EP'. Its type i; The datasheet doesn't state pin directions. SW, VCC, BST and SS types are my inference from their fu"
],
"pages_sent": 7,
"cost_usd": 0.0956,
"at": "2026-10-22T21:03:48"
},
"datasheet": {
"url": "https://www.ti.com/lit/ds/symlink/lm3100mhx.pdf",
"pages": 24,
"sha256": "0b3a1e5eb905b98b",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 21,
"described": 21,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
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"checked": "2026-10-22",
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},
{
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}
}