component
A4405KLPTR-T
Public Made by Adomby adom
Allegro MicroSystems, LLC Linear Voltage Regulators (LDO), TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
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"version": "0.1.0",
"type": "component",
"description": "Allegro MicroSystems, LLC Linear Voltage Regulators (LDO), TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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"component": {
"mpn": "A4405KLPTR-T",
"manufacturer": "Allegro MicroSystems, LLC",
"package": "TSSOP-20",
"pin_count": 20,
"category": "Power Supply Chip",
"subcategory": "Linear Voltage Regulators (LDO)",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/494b135fc4754338a83df49cd6c5973b.pdf",
"parts": {
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"lbr": "a4405klptr-t.lbr"
},
"distributor_links": {
"lcsc": "C2658891",
"digikey": "620-A4405KLPTR-TTR-ND",
"mouser": "250-A4405KLPTR-T"
},
"distributor_check": {
"checked_at": "2026-10-29T04:03:47Z",
"source": "Component Ocean /api/assign-pns",
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"pn": "620-A4405KLPTR-TTR-ND",
"status": "found",
"lifecycle": "Active"
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},
"pins": [
{
"number": "1",
"name": "VIN",
"type": "power_in",
"description": "Input voltage with a 5.5 to 36 V operating range and a 50 V absolute maximum for surges."
},
{
"number": "2",
"name": "GND",
"type": "power_in",
"description": "Ground terminal."
},
{
"number": "3",
"name": "TON",
"type": "input",
"description": "Buck regulator on-time programming pin, characterized with RTON = 412 kΩ."
},
{
"number": "4",
"name": "ENBAT",
"type": "input",
"description": "Ignition enable input from the key or switch via a 1 kΩ series resistor, with VIGN(H) of 4.0 V maximum and VIGN(L) of 2.2 V minimum."
},
{
"number": "5",
"name": "ENB",
"type": "input",
"description": "Logic enable input from the microcontroller, with VENB(H) of 2.0 V maximum and VENB(L) of 0.8 V minimum."
},
{
"number": "6",
"name": "ENBATS",
"type": "output",
"description": "Open-drain ignition status output, with VENBATS(L) of 400 mV maximum at 4 mA."
},
{
"number": "7",
"name": "NPOR",
"type": "output",
"description": "Active-low, open-drain fault indication output, with a low level of 400 mV maximum at 4 mA in the specified enable states."
},
{
"number": "8",
"name": "CPOR",
"type": "passive",
"description": "NPOR delay programming pin, with a charge current of about −13 µA and a rising threshold of 1.0 to 1.4 V."
},
{
"number": "9",
"name": "V5",
"type": "power_out",
"description": "5 V regulator output, accurate to 4.9 to 5.1 V for a 10 to 215 mA load when VVREG is at least 5.25 V."
},
{
"number": "10",
"name": "V5P",
"type": "power_out",
"description": "5 V tracking, short-to-battery protected regulator output, accurate to 4.9 to 5.1 V for a 10 to 270 mA load; protection diodes are required when driving a long harness or trace."
},
{
"number": "11",
"name": "V33",
"type": "power_out",
"description": "3.3 V regulator output, accurate to 3.23 to 3.37 V for a 10 to 500 mA load."
},
{
"number": "12",
"name": "G33",
"type": "output",
"description": "Gate driver to the external MOSFET for 3.3 V regulation, with a maximum gate voltage of 9 to 15 V when VV33 is 3.0 V."
},
{
"number": "13",
"name": "CLV33",
"type": "input",
"description": "3.3 V current sense and limit input, with a V33 overcurrent threshold of 175 to 245 mV between VREG and CLV33."
},
{
"number": "14",
"name": "VREG",
"type": "power_out",
"description": "Buck regulator DC output at 5.25 to 5.60 V, also serving as the input to the 3.3 V external regulator."
},
{
"number": "15",
"name": "ISEN–",
"type": "input",
"description": "Buck negative current sense pin at the sense resistor and diode node, with a VISEN threshold of 175 to 265 mV."
},
{
"number": "16",
"name": "ISEN+",
"type": "input",
"description": "Buck positive current sense pin at the sense resistor and ground node."
},
{
"number": "17",
"name": "LX",
"type": "output",
"description": "Buck regulator switching node."
},
{
"number": "18",
"name": "CP1",
"type": "passive",
"description": "Charge pump capacitor terminal 1."
},
{
"number": "19",
"name": "CP2",
"type": "passive",
"description": "Charge pump capacitor terminal 2."
},
{
"number": "20",
"name": "VCP",
"type": "power_out",
"description": "Charge pump reservoir capacitor terminal, with VVCP specified at 4.1 to 6.6 V above VIN."
}
],
"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: The exposed thermal pad is shown as PAD in the pinout diagram and as '–' in the terminal list. It is; The excerpt names the package as '20-pin TSSOP with exposed thermal pad (suffix LP)', which matches ; Pin types were assigned from function descriptions because the datasheet does not give KiCad types. "
],
"pages_sent": 7,
"cost_usd": 0.0556,
"at": "2026-10-29T04:03:33"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/494b135fc4754338a83df49cd6c5973b.pdf",
"pages": 27,
"sha256": "ac41eeb6d8c7b5ac",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 20,
"described": 20,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
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}