component
TPS2231PWR
Public Made by Adomby adom
Texas Instruments Power Distribution Switches, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"slug": "tps2231pwr",
"title": "TPS2231PWR",
"brief": "Texas Instruments Power Distribution Switches, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
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"component": {
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"manufacturer": "Texas Instruments",
"package": "TSSOP-20",
"pin_count": 20,
"category": "Power Management (PMIC)",
"subcategory": "Power Distribution Switches",
"datasheet": "https://www.ti.com/lit/ds/symlink/tps2231.pdf",
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"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "quota"
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"mouser": {
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"pins": [
{
"number": "1",
"name": "SYSRST",
"type": "input",
"description": "Active-low system reset driven by the host that forces PERST to assert, with an internal pullup to AUXIN; logic input/output voltage absolute maximum is -0.3 to 6 V."
},
{
"number": "2",
"name": "SHDN",
"type": "input",
"description": "Active-low shutdown input that turns off all voltage outputs and activates the discharge FETs when asserted, with an internal pullup to AUXIN."
},
{
"number": "3",
"name": "STBY",
"type": "input",
"description": "Active-low standby input that, when asserted after card insertion, turns off the 3.3-V and 1.5-V switches while keeping AUX on, with an internal pullup to AUXIN."
},
{
"number": "4",
"name": "3.3VIN",
"type": "power_in",
"description": "3.3-V input supplying the 3.3VOUT switch; absolute maximum VI(3.3VIN) is -0.3 to 6 V."
},
{
"number": "5",
"name": "3.3VIN",
"type": "power_in",
"description": "3.3-V input supplying the 3.3VOUT switch; absolute maximum VI(3.3VIN) is -0.3 to 6 V."
},
{
"number": "6",
"name": "3.3VOUT",
"type": "power_out",
"description": "Switched output that delivers 0 V, 3.3 V or high impedance to the card; absolute maximum VO(3.3VOUT) is -0.3 to 6 V and output current is internally limited."
},
{
"number": "7",
"name": "3.3VOUT",
"type": "power_out",
"description": "Switched output that delivers 0 V, 3.3 V or high impedance to the card; absolute maximum VO(3.3VOUT) is -0.3 to 6 V and output current is internally limited."
},
{
"number": "8",
"name": "PERST",
"type": "output",
"description": "Logic-level power-good output to slot 0 (with delay) that remains asserted low until all rails are within tolerance; PERST sink/source current is limited to 10 mA absolute maximum."
},
{
"number": "9",
"name": "NC",
"type": "unconnected",
"description": "No internal connection."
},
{
"number": "10",
"name": "GND",
"type": "power_in",
"description": "Ground reference for the device."
},
{
"number": "11",
"name": "CPUSB",
"type": "input",
"description": "Card-present input for USB cards; a logic low indicates the card supports USB functions, with an internal pullup to AUXIN."
},
{
"number": "12",
"name": "CPPE",
"type": "input",
"description": "Card-present input for PCI Express cards; a logic low indicates the card supports PCI Express functions, with an internal pullup to AUXIN."
},
{
"number": "13",
"name": "1.5VOUT",
"type": "power_out",
"description": "Switched output that delivers 0 V, 1.5 V or high impedance to the card; absolute maximum VO(1.5VOUT) is -0.3 to 6 V and output current is internally limited."
},
{
"number": "14",
"name": "1.5VOUT",
"type": "power_out",
"description": "Switched output that delivers 0 V, 1.5 V or high impedance to the card; absolute maximum VO(1.5VOUT) is -0.3 to 6 V and output current is internally limited."
},
{
"number": "15",
"name": "1.5VIN",
"type": "power_in",
"description": "1.5-V input supplying the 1.5VOUT switch; absolute maximum VI(1.5VIN) is -0.3 to 6 V."
},
{
"number": "16",
"name": "1.5VIN",
"type": "power_in",
"description": "1.5-V input supplying the 1.5VOUT switch; absolute maximum VI(1.5VIN) is -0.3 to 6 V."
},
{
"number": "17",
"name": "AUXOUT",
"type": "power_out",
"description": "Switched output that delivers 0 V, AUX or high impedance to the card; absolute maximum VO(AUXOUT) is -0.3 to 6 V and output current is internally limited."
},
{
"number": "18",
"name": "AUXIN",
"type": "power_in",
"description": "AUX input that supplies the AUXOUT switch and chip power; absolute maximum VI(AUXIN) is -0.3 to 6 V."
},
{
"number": "19",
"name": "RCLKEN",
"type": "bidirectional",
"description": "Reference clock enable that acts as a power-good output to the host for slot 0 (no delay, open drain) and, when held low externally, as an input that delays PERST de-assertion; it is internally pulled up to AUXIN and must not be driven high."
},
{
"number": "20",
"name": "OC",
"type": "output",
"description": "Open-drain overcurrent status output for slot 0 that is pulled low when any of the AUX, 3.3-V or 1.5-V switches is in overcurrent; OC sink current is limited to 10 mA absolute maximum."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
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"primary_model": "claude-haiku-5-5",
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"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: The PW pin-number assignment is taken from the terminal functions table (page 8) and confirmed again; The datasheet labels the supply rail pins 3.3VIN, 1.5VIN and AUXIN as inputs (I). They are typed her; The switched card outputs are labeled O in the datasheet. They are typed here as power_out because t"
],
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"at": "2026-10-17T20:26:20"
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"zmin_mm": 0,
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"metadata": {
"specs": {
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"Package": "TSSOP-20",
"Category": "Power Management (PMIC)",
"Pins": "20"
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"source": "datasheet",
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"rows": [
{
"name": "Input voltage range for card power, 3.3VIN",
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{
"name": "Input voltage range for card power, 1.5VIN",
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"name": "Input voltage range, AUXIN",
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{
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"name": "Output voltage range, 3.3VOUT",
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{
"name": "Output voltage range, 1.5VOUT",
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"name": "Output voltage range, AUXOUT",
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{
"name": "OC sink current",
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{
"name": "PERST sink/source current",
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"source": "datasheet"
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{
"name": "Operating virtual junction temperature range",
"symbol": "TJ",
"kind": "absolute_maximum",
"unit": "°C",
"min": -40,
"typ": null,
"max": 120,
"conditions": "",
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"source": "datasheet"
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{
"name": "Storage temperature range",
"symbol": "Tstg",
"kind": "absolute_maximum",
"unit": "°C",
"min": -55,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 2,
"source": "datasheet"
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{
"name": "Lead temperature",
"symbol": "",
"kind": "absolute_maximum",
"unit": "°C",
"min": null,
"typ": null,
"max": 260,
"conditions": "1.6 mm (1/16 inch) from case for 10 seconds",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Electrostatic discharge, human body model (HBM)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "kV",
"min": null,
"typ": null,
"max": 2,
"conditions": "MIL-STD-883C",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Electrostatic discharge, charge device model (CDM)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 500,
"conditions": "Charge device model",
"source_page": 2,
"source": "datasheet"
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{
"name": "Input voltage, 3.3VIN",
"symbol": "VI(3.3VIN)",
"kind": "recommended_operating",
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"min": 3,
"typ": null,
"max": 3.6,
"conditions": "3.3VIN is only required for its respective functions",
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{
"name": "Input voltage, 1.5VIN",
"symbol": "VI(1.5VIN)",
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"typ": null,
"max": 1.65,
"conditions": "1.5VIN is only required for its respective functions",
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"source": "datasheet"
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{
"name": "Input voltage, AUXIN",
"symbol": "VI(AUXIN)",
"kind": "recommended_operating",
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"typ": null,
"max": 3.6,
"conditions": "AUXIN is required for all circuit operations",
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"source": "datasheet"
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{
"name": "Continuous output current, 3.3VOUT",
"symbol": "IO(3.3VOUT)",
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"max": 1.3,
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"source_page": 3,
"source": "datasheet"
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{
"name": "Continuous output current, 1.5VOUT",
"symbol": "IO(1.5VOUT)",
"kind": "recommended_operating",
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"min": 0,
"typ": null,
"max": 650,
"conditions": "TJ = 120°C",
"source_page": 3,
"source": "datasheet"
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{
"name": "Continuous output current, AUXOUT",
"symbol": "IO(AUXOUT)",
"kind": "recommended_operating",
"unit": "mA",
"min": 0,
"typ": null,
"max": 275,
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"source_page": 3,
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{
"name": "Operating virtual junction temperature",
"symbol": "TJ",
"kind": "recommended_operating",
"unit": "°C",
"min": -40,
"typ": null,
"max": 120,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Dissipation rating, PW (20) package power at TA ≤ 25°C",
"symbol": "",
"kind": "thermal",
"unit": "mW",
"min": null,
"typ": null,
"max": 704.2,
"conditions": "TA ≤ 25°C; JEDEC low-k board; maximum junction temperature 120°C",
"source_page": 3,
"source": "datasheet"
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{
"name": "Power switch resistance, 3.3VIN to 3.3VOUT",
"symbol": "",
"kind": "electrical",
"unit": "mΩ",
"min": null,
"typ": null,
"max": 45,
"conditions": "TJ = 25°C, I = 1300 mA each",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Power switch resistance, 3.3VIN to 3.3VOUT",
"symbol": "",
"kind": "electrical",
"unit": "mΩ",
"min": null,
"typ": null,
"max": 68,
"conditions": "TJ = 100°C, I = 1300 mA each",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Power switch resistance, 1.5VIN to 1.5VOUT",
"symbol": "",
"kind": "electrical",
"unit": "mΩ",
"min": null,
"typ": null,
"max": 46,
"conditions": "TJ = 25°C, I = 650 mA each",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Power switch resistance, 1.5VIN to 1.5VOUT",
"symbol": "",
"kind": "electrical",
"unit": "mΩ",
"min": null,
"typ": null,
"max": 70,
"conditions": "TJ = 100°C, I = 650 mA each",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Power switch resistance, AUXIN to AUXOUT",
"symbol": "",
"kind": "electrical",
"unit": "mΩ",
"min": null,
"typ": null,
"max": 120,
"conditions": "TJ = 25°C, I = 275 mA each",
"source_page": 3,
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},
{
"name": "Power switch resistance, AUXIN to AUXOUT",
"symbol": "",
"kind": "electrical",
"unit": "mΩ",
"min": null,
"typ": null,
"max": 200,
"conditions": "TJ = 100°C, I = 275 mA each",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Discharge resistance on 3.3V/1.5V/AUX outputs",
"symbol": "R(DIS_FET)",
"kind": "electrical",
"unit": "Ω",
"min": 100,
"typ": null,
"max": 500,
"conditions": "VI(/SHDNx) = 0 V, I(discharge) = 1 mA",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Short-circuit output current, 3.3VOUT (steady-state)",
"symbol": "IOS(3.3VOUT)",
"kind": "electrical",
"unit": "A",
"min": 1.35,
"typ": 2,
"max": 2.5,
"conditions": "Output powered into a short; TJ (-40, 120°C]",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Short-circuit output current, 1.5VOUT (steady-state)",
"symbol": "IOS(1.5VOUT)",
"kind": "electrical",
"unit": "A",
"min": 0.67,
"typ": 1,
"max": 1.3,
"conditions": "Output powered into a short; TJ (-40, 120°C]",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Short-circuit output current, AUXOUT (steady-state)",
"symbol": "IOS(AUXOUT)",
"kind": "electrical",
"unit": "mA",
"min": 275,
"typ": 450,
"max": 600,
"conditions": "Output powered into a short; TJ (-40, 120°C]",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Thermal trip point, rising temperature, not in overcurrent condition",
"symbol": "TJ",
"kind": "electrical",
"unit": "°C",
"min": 155,
"typ": null,
"max": 165,
"conditions": "Not in overcurrent condition",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Thermal trip point, overcurrent condition shutdown",
"symbol": "TJ",
"kind": "electrical",
"unit": "°C",
"min": 120,
"typ": null,
"max": 130,
"conditions": "Overcurrent condition",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Current-limit response time, VO(3.3VOUT) with 100-mΩ short",
"symbol": "",
"kind": "electrical",
"unit": "μs",
"min": 43,
"typ": null,
"max": 100,
"conditions": "From short to the 1st threshold within 1.1 μs of final current limit, TJ = 25°C",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Current-limit response time, VO(1.5VOUT) with 100-mΩ short, TPS2231",
"symbol": "",
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"conditions": "From short to the 1st threshold within 1.1 μs of final current limit, TJ = 25°C",
"source_page": 3,
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