component
LT3742EUF#PBF
Public Made by Adomby adom
Analog Devices DC-DC Converters, QFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"title": "LT3742EUF#PBF",
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"manufacturer": "Analog Devices",
"package": "QFN-24-EP(4x4)",
"pin_count": 25,
"category": "Power Management ICs",
"subcategory": "DC-DC Converters",
"datasheet": "https://www.analog.com/media/en/technical-documentation/data-sheets/3742fa.pdf",
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"pins": [
{
"number": "1",
"name": "G1",
"type": "output",
"description": "Gate drive output for controller 1's external N-channel MOSFET, a floating driver whose voltage swings between the BIAS and SW pins."
},
{
"number": "2",
"name": "VIN",
"type": "power_in",
"description": "Input voltage pin supplying the internal circuitry (4V to 30V operating, 30V abs max); must be locally bypassed with a capacitor."
},
{
"number": "3",
"name": "UVLO",
"type": "input",
"description": "Undervoltage lockout input with 1.25V threshold programmed by a divider from VIN, 3µA hysteresis current sink; do not leave open, connect to VIN if unused."
},
{
"number": "4",
"name": "BIAS",
"type": "passive",
"description": "Gate-drive bias rail regulated to VIN + 7V to drive the external N-channel MOSFETs (40V abs max)."
},
{
"number": "5",
"name": "SWB",
"type": "output",
"description": "Collector of the internal NPN switch of the bias boost regulator that generates the gate-drive bias voltage (40V abs max, 340mA typ current limit)."
},
{
"number": "6",
"name": "G2",
"type": "output",
"description": "Gate drive output for controller 2's external N-channel MOSFET, a floating driver whose voltage swings between the BIAS and SW pins."
},
{
"number": "7",
"name": "SW2",
"type": "passive",
"description": "Switch node of regulator 2, connected to the source of the external N-channel MOSFET and to the inductor and diode."
},
{
"number": "8",
"name": "NC",
"type": "unconnected",
"description": "No connect pin."
},
{
"number": "9",
"name": "NC",
"type": "unconnected",
"description": "No connect pin."
},
{
"number": "10",
"name": "SENSE2+",
"type": "input",
"description": "Positive current sense input of regulator 2, used with SENSE2- to sense inductor current (30V abs max)."
},
{
"number": "11",
"name": "SENSE2–",
"type": "input",
"description": "Negative current sense input of regulator 2, used with SENSE2+ to sense inductor current (30V abs max)."
},
{
"number": "12",
"name": "FB2",
"type": "input",
"description": "Feedback pin of regulator 2, regulated to 800mV; connect feedback resistors here to set the output voltage."
},
{
"number": "13",
"name": "VC2",
"type": "passive",
"description": "Control voltage and error amplifier compensation pin for regulator 2; connect a series RC to ground."
},
{
"number": "14",
"name": "PG2",
"type": "output",
"description": "Open-collector power good output for regulator 2, low until FB is within 90% of final regulation; leave unconnected if unused."
},
{
"number": "15",
"name": "RUN/SS2",
"type": "input",
"description": "Run/soft-start pin for regulator 2; pull to ground with an open-drain device to shut down, add a capacitor for soft-start (1µA charge current)."
},
{
"number": "16",
"name": "RUN/SS1",
"type": "input",
"description": "Run/soft-start pin for regulator 1; pull to ground with an open-drain device to shut down, add a capacitor for soft-start (1µA charge current)."
},
{
"number": "17",
"name": "PG1",
"type": "output",
"description": "Open-collector power good output for regulator 1, low until FB is within 90% of final regulation; leave unconnected if unused."
},
{
"number": "18",
"name": "VC1",
"type": "passive",
"description": "Control voltage and error amplifier compensation pin for regulator 1; connect a series RC to ground."
},
{
"number": "19",
"name": "FB1",
"type": "input",
"description": "Feedback pin of regulator 1, regulated to 800mV; connect feedback resistors here to set the output voltage."
},
{
"number": "20",
"name": "SENSE1–",
"type": "input",
"description": "Negative current sense input of regulator 1, used with SENSE1+ to sense inductor current (30V abs max)."
},
{
"number": "21",
"name": "SENSE1+",
"type": "input",
"description": "Positive current sense input of regulator 1, used with SENSE1- to sense inductor current (30V abs max)."
},
{
"number": "22",
"name": "NC",
"type": "unconnected",
"description": "No connect pin."
},
{
"number": "23",
"name": "NC",
"type": "unconnected",
"description": "No connect pin."
},
{
"number": "24",
"name": "SW1",
"type": "passive",
"description": "Switch node of regulator 1, connected to the source of the external N-channel MOSFET and to the inductor and diode."
},
{
"number": "25",
"name": "GND",
"type": "power_in",
"description": "Exposed pad, ground; provides electrical and thermal contact to the PCB and must be soldered to the board."
}
],
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"guards": "pin_guards 0.1: passed",
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],
"pages_sent": 9,
"cost_usd": 0.1275,
"at": "2026-10-30T21:04:41"
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"datasheet": {
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"pins": {
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"described": 25,
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"sha256": "096fc110543e6d324c5120c2d38e3dca87a389da9b6fac234f1fe40856295ef4",
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"package_dims": {
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"D": {
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"source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
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"metadata": {
"specs": {
"Manufacturer": "Analog Devices",
"Package": "QFN-24-EP(4x4)",
"Category": "Power Management ICs",
"Pins": "25"
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"characteristics": {
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"rows": [
{
"name": "Input Voltage",
"symbol": "VIN",
"kind": "absolute_maximum",
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"min": null,
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"conditions": "",
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{
"name": "UVLO Voltage",
"symbol": "",
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"min": null,
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{
"name": "PG1, PG2 Voltage",
"symbol": "",
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"unit": "V",
"min": null,
"typ": null,
"max": 30,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "SWB, BIAS Voltage",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 40,
"conditions": "",
"source_page": 2,
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{
"name": "SENSE+ Voltage",
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"min": null,
"typ": null,
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"conditions": "SENSE1+, SENSE2+",
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{
"name": "SENSE– Voltage",
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"conditions": "SENSE1–, SENSE2–",
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{
"name": "RUN/SS Voltage",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 6,
"conditions": "RUN/SS1, RUN/SS2",
"source_page": 2,
"source": "datasheet"
},
{
"name": "FB Voltage",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 6,
"conditions": "FB1, FB2",
"source_page": 2,
"source": "datasheet"
},
{
"name": "VC Voltage",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 6,
"conditions": "VC1, VC2",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Junction Temperature",
"symbol": "TJMAX",
"kind": "absolute_maximum",
"unit": "°C",
"min": null,
"typ": null,
"max": 125,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Operating Junction Temperature Range",
"symbol": "TJ",
"kind": "recommended_operating",
"unit": "°C",
"min": -40,
"typ": null,
"max": 125,
"conditions": "Note 2",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Storage Temperature Range",
"symbol": "TSTG",
"kind": "absolute_maximum",
"unit": "°C",
"min": -65,
"typ": null,
"max": 125,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Junction-to-Ambient Thermal Resistance",
"symbol": "θJA",
"kind": "thermal",
"unit": "°C/W",
"min": null,
"typ": 36,
"max": null,
"conditions": "UF package",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Minimum Operating Input Voltage",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": 3.5,
"max": 4,
"conditions": "VUVLO = 1.5V",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Quiescent Current",
"symbol": "IQ",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 5,
"max": 7,
"conditions": "VRUN/SS1 = VRUN/SS2 = VFB1 = VFB2 = 1V",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Shutdown Current",
"symbol": "",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 20,
"max": 35,
"conditions": "VRUN/SS1 = VRUN/SS2 = 0V",
"source_page": 2,
"source": "datasheet"
},
{
"name": "UVLO Pin Threshold",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": 1.2,
"typ": 1.25,
"max": 1.28,
"conditions": "UVLO Pin Voltage Rising",
"source_page": 2,
"source": "datasheet"
},
{
"name": "UVLO Pin Hysteresis Current",
"symbol": "",
"kind": "electrical",
"unit": "µA",
"min": 1.8,
"typ": 3,
"max": 4,
"conditions": "VUVLO = 1V, Current Flows Into Pin",
"source_page": 2,
"source": "datasheet"
},
{
"name": "RUN/SS Pin Threshold",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": 0.2,
"max": 0.5,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "RUN/SS Pin Charge Current",
"symbol": "",
"kind": "electrical",
"unit": "µA",
"min": 0.5,
"typ": 1,
"max": 1.5,
"conditions": "VRUN/SS = 0V",
"source_page": 2,
"source": "datasheet"
},
{
"name": "FB Pin Voltage",
"symbol": "VFB",
"kind": "electrical",
"unit": "V",
"min": 0.788,
"typ": 0.8,
"max": 0.812,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "FB Pin Bias Current",
"symbol": "",
"kind": "electrical",
"unit": "nA",
"min": null,
"typ": 50,
"max": 200,
"conditions": "VFB = 0.8V, VC = 0.4V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "FB Pin Voltage Matching",
"symbol": "",
"kind": "electrical",
"unit": "mV",
"min": -4,
"typ": 0,
"max": 4,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Controller Switching Frequency",
"symbol": "",
"kind": "electrical",
"unit": "kHz",
"min": 440,
"typ": 500,
"max": 560,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Maximum Current Sense Voltage",
"symbol": "",
"kind": "electrical",
"unit": "mV",
"min": 50,
"typ": 60,
"max": 70,
"conditions": "VSENSE– = 3.3V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Current Sense Matching Between Controllers",
"symbol": "",
"kind": "electrical",
"unit": "%",
"min": null,
"typ": 5,
"max": null,
"conditions": "printed ±5",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Gate On Voltage (VG – VSW)",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": 6,
"typ": 6.7,
"max": 7,
"conditions": "VBIAS = 12V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Gate Off Voltage (VG – VSW)",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": 0.4,
"max": 0.75,
"conditions": "VBIAS = 12V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "PG Pin Voltage Low",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": 0.2,
"max": 0.5,
"conditions": "IPG = 100µA",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Lower PG Trip Level",
"symbol": "",
"kind": "electrical",
"unit": "%",
"min": -13,
"typ": -10,
"max": -7,
"conditions": "Relative to VFB, VFB Increasing",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Lower PG Trip Level",
"symbol": "",
"kind": "electrical",
"unit": "%",
"min": -16,
"typ": -13,
"max": -10,
"conditions": "Relative to VFB, VFB Decreasing",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Upper PG Trip Level",
"symbol": "",
"kind": "electrical",
"unit": "%",
"min": 7,
"typ": 10,
"max": 13,
"conditions": "Relative to VFB, VFB Increasing",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Upper PG Trip Level",
"symbol": "",
"kind": "electrical",
"unit": "%",
"min": 4,
"typ": 7,
"max": 10,
"conditions": "Relative to VFB, VFB Decreasing",
"source_page": 3,
"source": "datasheet"
},
{
"name": "PG Pin Leakage Current",
"symbol": "",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": null,
"max": 0.1,
"conditions": "VPG = 2V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "PG Pin Sink Current",
"symbol": "",
"kind": "electrical",
"unit": "µA",
"min": 200,
"typ": 500,
"max": null,
"conditions": "VPG = 0.5V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Bias Pin Voltage",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": 6.6,
"typ": 7,
"max": 7.7,
"conditions": "relative to VIN (VIN + x)",
"source_page": 3,
"source": "datasheet"
},
{
"name": "SWB Pin Current Limit",
"symbol": "",
"kind": "electrical",
"unit": "mA",
"min": 250,
"typ": 340,
"max": 500,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "SWB Pin Leakage Current",
"symbol": "",
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