component
TPS54478RTER
Public Made by Adomby adom
Texas Instruments DC-DC Converters, WQFN-16-EP(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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tps54478rter: specified limits as data (metadata.characteristics, 60 rows from the datasheet)
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25d ago
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{
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"type": "component",
"slug": "tps54478rter",
"title": "TPS54478RTER",
"brief": "Texas Instruments DC-DC Converters, WQFN-16-EP(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
"license": "CC-BY-SA-4.0",
"tags": [
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"power management (pmic)",
"tps54478rter",
"factory-2.0.0",
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],
"component": {
"mpn": "TPS54478RTER",
"manufacturer": "Texas Instruments",
"package": "WQFN-16-EP(3x3)",
"pin_count": 17,
"category": "Power Management (PMIC)",
"subcategory": "DC-DC Converters",
"datasheet": "https://www.ti.com/cn/lit/gpn/tps54478",
"parts": {
"symbol": "tps54478rter.kicad_sym",
"footprint": "tps54478rter.kicad_mod",
"model_3d": "tps54478rter-hero.glb",
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"model_3d_step": "tps54478rter-etched.step",
"model_3d_step_plain": "tps54478rter.step",
"lbr": "tps54478rter.lbr"
},
"distributor_links": {
"lcsc": "C2865349",
"digikey": "296-42700-2-ND",
"mouser": "595-TPS54478RTER"
},
"distributor_check": {
"checked_at": "2026-10-10T23:34:58Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "296-42700-2-ND",
"status": "found",
"lifecycle": "Active"
},
"mouser": {
"pn": "595-TPS54478RTER",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "VIN",
"type": "power_in",
"description": "Input supply voltage, 2.95 V to 6 V."
},
{
"number": "2",
"name": "VIN",
"type": "power_in",
"description": "Input supply voltage, 2.95 V to 6 V."
},
{
"number": "3",
"name": "GND",
"type": "power_in",
"description": "Power ground; this pin should be electrically connected directly to the power pad under the IC."
},
{
"number": "4",
"name": "GND",
"type": "power_in",
"description": "Power ground; this pin should be electrically connected directly to the power pad under the IC."
},
{
"number": "5",
"name": "AGND",
"type": "power_in",
"description": "Analog ground should be electrically connected to GND close to the device."
},
{
"number": "6",
"name": "VSENSE",
"type": "input",
"description": "Inverting node of the transconductance (gm) error amplifier."
},
{
"number": "7",
"name": "COMP",
"type": "bidirectional",
"description": "Error amplifier output and input to the output switch current comparator; frequency compensation components connect to this pin."
},
{
"number": "8",
"name": "RT/CLK",
"type": "input",
"description": "Resistor timing or external clock input; the RT/CLK pin is typically 0.5 V, and the synchronization square wave must transition below 0.6 V and above 1.6 V typically."
},
{
"number": "9",
"name": "SS/TR",
"type": "input",
"description": "Slow start and tracking pin; an external capacitor sets the output voltage rise time, and higher charge current applies when SS is below 0.15 V."
},
{
"number": "10",
"name": "PH",
"type": "output",
"description": "Source of the internal high-side power MOSFET and drain of the internal low-side (synchronous) rectifier MOSFET."
},
{
"number": "11",
"name": "PH",
"type": "output",
"description": "Source of the internal high-side power MOSFET and drain of the internal low-side (synchronous) rectifier MOSFET."
},
{
"number": "12",
"name": "PH",
"type": "output",
"description": "Source of the internal high-side power MOSFET and drain of the internal low-side (synchronous) rectifier MOSFET."
},
{
"number": "13",
"name": "BOOT",
"type": "output",
"description": "A bootstrap capacitor is required between BOOT and PH; if its voltage falls below the BOOT UVLO minimum, the output is forced to switch off until the capacitor is refreshed."
},
{
"number": "14",
"name": "PWRGD",
"type": "output",
"description": "Open-drain output that asserts low if the output voltage is low due to thermal shutdown, overcurrent, over/under-voltage, or EN shutdown."
},
{
"number": "15",
"name": "EN",
"type": "input",
"description": "Enable pin with internal pull-up current source; pull below 1.21 V to disable and float to enable, and two additional resistors can set the on/off threshold (adjust UVLO)."
},
{
"number": "17",
"name": "Thermal Pad",
"type": "power_in",
"description": "GND pin should be connected to the exposed thermal pad for proper operation, and the pad should be connected to an internal PCB ground plane using multiple vias."
},
{
"number": "16",
"name": "VIN",
"type": "power_in",
"description": "Input supply voltage, 2.95 V to 6 V."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
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"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 datasheet lists VIN as type 'I'; mapped to KiCad power_in because it is the main supply input. C; The datasheet lists AGND as a plain ground pin with no I/O type; mapped to power_in to match the gro; The datasheet gives BOOT and PH as type 'O'; they are mapped to KiCad output, though PH is a switchi"
],
"pages_sent": 10,
"cost_usd": 0.0613,
"at": "2026-10-10T23:34:45"
},
"datasheet": {
"url": "https://www.ti.com/cn/lit/gpn/tps54478",
"pages": 43,
"sha256": "efbe291862db5c5d",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 17,
"described": 17,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
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"footprint": "viewers/footprint.html"
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"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
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"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "3eb81ffac423a66cdcfead8efe56401da171edaf1f2257049aad7b2d3900f6c8",
"checked": "2026-10-10",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
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]
},
"metadata": {
"specs": {
"Manufacturer": "Texas Instruments",
"Package": "WQFN-16-EP(3x3)",
"Category": "Power Management (PMIC)",
"Pins": "17"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "efbe291862db5c5d",
"rows": [
{
"name": "Input voltage (VIN pin)",
"symbol": "VIN",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
"typ": null,
"max": 7,
"conditions": "",
"source_page": 4,
"source": "datasheet"
},
{
"name": "EN pin voltage",
"symbol": "EN",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
"typ": null,
"max": 7,
"conditions": "",
"source_page": 4,
"source": "datasheet"
},
{
"name": "VSENSE pin voltage",
"symbol": "VSENSE",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
"typ": null,
"max": 3,
"conditions": "",
"source_page": 4,
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},
{
"name": "COMP pin voltage",
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"min": -0.3,
"typ": null,
"max": 3,
"conditions": "",
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},
{
"name": "PWRGD pin voltage",
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"min": -0.3,
"typ": null,
"max": 7,
"conditions": "",
"source_page": 4,
"source": "datasheet"
},
{
"name": "SS/TR pin voltage",
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"kind": "absolute_maximum",
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"min": -0.3,
"typ": null,
"max": 3,
"conditions": "",
"source_page": 4,
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},
{
"name": "RT/CLK pin voltage",
"symbol": "RT/CLK",
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"min": -0.3,
"typ": null,
"max": 3.3,
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{
"name": "BOOT-PH output voltage",
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"min": null,
"typ": null,
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{
"name": "PH output voltage (DC)",
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"kind": "absolute_maximum",
"unit": "V",
"min": -0.6,
"typ": null,
"max": 7,
"conditions": "",
"source_page": 4,
"source": "datasheet"
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{
"name": "PH output voltage (transient)",
"symbol": "PH",
"kind": "absolute_maximum",
"unit": "V",
"min": -2,
"typ": null,
"max": 10,
"conditions": "10 ns transient",
"source_page": 4,
"source": "datasheet"
},
{
"name": "EN source current",
"symbol": "EN",
"kind": "absolute_maximum",
"unit": "µA",
"min": null,
"typ": null,
"max": 100,
"conditions": "",
"source_page": 4,
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{
"name": "RT/CLK source current",
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"min": null,
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{
"name": "COMP sink current",
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"min": null,
"typ": null,
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{
"name": "PWRGD sink current",
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{
"name": "SS/TR sink current",
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"kind": "absolute_maximum",
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"min": null,
"typ": null,
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{
"name": "Junction temperature",
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"unit": "°C",
"min": -40,
"typ": null,
"max": 150,
"conditions": "",
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},
{
"name": "Storage temperature",
"symbol": "Tstg",
"kind": "absolute_maximum",
"unit": "°C",
"min": -65,
"typ": null,
"max": 150,
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"source_page": 4,
"source": "datasheet"
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{
"name": "Input voltage range",
"symbol": "VIN",
"kind": "recommended_operating",
"unit": "V",
"min": 2.95,
"typ": null,
"max": 6,
"conditions": "",
"source_page": 4,
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{
"name": "Output current",
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"unit": "A",
"min": 0,
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{
"name": "Operating junction temperature range",
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"min": -40,
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{
"name": "Operating input voltage",
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"kind": "electrical",
"unit": "V",
"min": 2.95,
"typ": null,
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"conditions": "",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Shutdown supply current",
"symbol": "",
"kind": "electrical",
"unit": "μA",
"min": null,
"typ": 0.7,
"max": 2.5,
"conditions": "EN = 0 V, 25°C, 2.95 V ≤ VIN ≤ 6 V",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Quiescent current - Iq",
"symbol": "Iq",
"kind": "electrical",
"unit": "μA",
"min": null,
"typ": 525,
"max": 700,
"conditions": "VSENSE = 0.7 V, VIN = 5 V, 25°C, RT = 78.7 kΩ",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Voltage reference",
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"kind": "electrical",
"unit": "V",
"min": 0.594,
"typ": 0.6,
"max": 0.606,
"conditions": "2.95 V ≤ VIN ≤ 6 V, –40°C <TJ < 150°C",
"source_page": 5,
"source": "datasheet"
},
{
"name": "High side switch resistance",
"symbol": "",
"kind": "electrical",
"unit": "mΩ",
"min": null,
"typ": 30,
"max": 60,
"conditions": "BOOT-PH = 5 V",
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},
{
"name": "High side switch resistance",
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"min": null,
"typ": 37,
"max": 70,
"conditions": "BOOT-PH = 3.3 V",
"source_page": 5,
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},
{
"name": "Low side switch resistance",
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"conditions": "VIN = 5 V",
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},
{
"name": "Low side switch resistance",
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"kind": "electrical",
"unit": "mΩ",
"min": null,
"typ": 37,
"max": 70,
"conditions": "VIN = 3.3 V",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Error amplifier source/sink",
"symbol": "",
"kind": "electrical",
"unit": "µA",
"min": -20,
"typ": null,
"max": 20,
"conditions": "V(COMP) = 1 V, 100 mV overdrive",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Current limit threshold",
"symbol": "",
"kind": "electrical",
"unit": "A",
"min": 5.2,
"typ": 6.5,
"max": 8.2,
"conditions": "VIN = 6V, Fs = 500 KHz",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Switching frequency range using RT mode",
"symbol": "",
"kind": "electrical",
"unit": "kHz",
"min": 200,
"typ": null,
"max": 2000,
"conditions": "",
"source_page": 6,
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},
{
"name": "Switching frequency",
"symbol": "",
"kind": "electrical",
"unit": "kHz",
"min": 400,
"typ": 500,
"max": 600,
"conditions": "R(RT/CLK) = 78.7 kΩ",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Switching frequency range using CLK mode",
"symbol": "",
"kind": "electrical",
"unit": "kHz",
"min": 300,
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},
{
"name": "RT/CLK high threshold",
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"min": 1.6,
"typ": null,
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{
"name": "RT/CLK low threshold",
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"min": 0.4,
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},
{
"name": "On resistance (PWRGD)",
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"kind": "electrical",
"unit": "Ω",
"min": null,
"typ": 56,
"max": 120,
"conditions": "VIN = 2.95 V",
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},
{
"name": "Output low (PWRGD)",
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"min": null,
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"conditions": "I(PWRGD) = 3 mA",
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},
{
"name": "Minimum VIN for valid output (PWRGD)",
"symbol": "",
"kind": "electrical",
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"min": null,
"typ": 1.2,
"max": 1.6,
"conditions": "V(PWRGD) < 0.5 V at 100 μA",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Junction-to-ambient thermal resistance",
"symbol": "RθJA",
"kind": "thermal",
"unit": "°C/W",
"min": null,
"typ": 49.1,
"max": null,
"conditions": "",
"source_page": 5,
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},
{
"name": "Junction-to-case (top) thermal resistance",
"symbol": "RθJC(top)",
"kind": "thermal",
"unit": "°C/W",
"min": null,
"typ": 0.7,
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},
{
"name": "Junction-to-board thermal resistance",
"symbol": "RθJB",
"kind": "thermal",
"unit": "°C/W",
"min": null,
"typ": 21.8,
"max": null,
"conditions": "",
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},
{
"name": "Junction-to-top characterization parameter",
"symbol": "ψJT",
"kind": "thermal",
"unit": "°C/W",
"min": null,
"typ": 50.7,
"max": null,
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},
{
"name": "Junction-to-board characterization parameter",
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"min": null,
"typ": 7.5,
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},
{
"name": "Junction-to-case (bottom) thermal resistance",
"symbol": "RθJC(bot)",
"kind": "thermal",
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"min": null,
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