component
LT8390EFE#TRPBF
Public Made by Adomby adom
Analog Devices DC-DC Converters, HTSSOP-28. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"title": "LT8390EFE#TRPBF",
"brief": "Analog Devices DC-DC Converters, HTSSOP-28. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
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"manufacturer": "Analog Devices",
"package": "HTSSOP-28",
"pin_count": 29,
"category": "Power Management (PMIC)",
"subcategory": "DC-DC Converters",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588908025238704128",
"parts": {
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"digikey": "LT8390EFE#TRPBFTR-ND",
"mouser": "584-LT8390EFE#TRPBF"
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"pins": [
{
"number": "1",
"name": "BG1",
"type": "output",
"description": "Buck side bottom N-channel MOSFET gate drive, swinging from ground to INTVCC."
},
{
"number": "2",
"name": "BST1",
"type": "power_out",
"description": "Buck side bootstrap floating driver supply with an integrated Schottky diode from INTVCC, requiring an external bootstrap capacitor to SW1 and swinging from a diode drop below INTVCC to (VIN + INTVCC)."
},
{
"number": "3",
"name": "SW1",
"type": "output",
"description": "Buck side switch node that swings from a Schottky diode drop below ground up to VIN."
},
{
"number": "4",
"name": "TG1",
"type": "output",
"description": "Buck side top N-channel MOSFET gate drive, swinging from SW1 to BST1."
},
{
"number": "5",
"name": "LSP",
"type": "passive",
"description": "Positive terminal of the buck side inductor current sense resistor (RSENSE), requiring a Kelvin connection for accurate current sensing."
},
{
"number": "6",
"name": "LSN",
"type": "passive",
"description": "Negative terminal of the buck side inductor current sense resistor (RSENSE), requiring a Kelvin connection for accurate current sensing."
},
{
"number": "7",
"name": "VIN",
"type": "power_in",
"description": "Input supply that must be tied to the power input to set buck, buck-boost or boost regions, bypassed locally with a minimum 1µF ceramic capacitor."
},
{
"number": "8",
"name": "INTVCC",
"type": "power_out",
"description": "Internal 5V linear regulator output, supplied from VIN, powering control circuitry and gate drivers and bypassed with a minimum 4.7µF ceramic capacitor."
},
{
"number": "9",
"name": "EN/UVLO",
"type": "input",
"description": "Enable and undervoltage lockout: forcing below 0.3V shuts the part down, above 1.233V gives normal operation, and the 1.220V falling threshold sets UVLO via a resistor divider; tie directly to VIN if unused."
},
{
"number": "10",
"name": "TEST",
"type": "input",
"description": "Factory test pin for testing only, which must be directly connected to ground for the part to operate properly."
},
{
"number": "11",
"name": "LOADEN",
"type": "input",
"description": "Load switch enable input for the high side PMOS load switch; tie to VREF or INTVCC if unused, and forcing it low turns off TG1 and TG2, turns on BG1 and BG2, and turns off LOADTG."
},
{
"number": "12",
"name": "VREF",
"type": "power_out",
"description": "Voltage reference output providing an accurate 2V reference capable of supplying 1mA, bypassed with a 0.47µF ceramic capacitor."
},
{
"number": "13",
"name": "CTRL",
"type": "input",
"description": "Control input that programs the ISP/ISN current sense threshold from VREF or a resistor divider; forcing it below 0.3V stops switching, and tying it to VREF gives the 100mV full scale threshold."
},
{
"number": "14",
"name": "ISP",
"type": "input",
"description": "Positive terminal of the ISP/ISN current sense resistor (RIS), requiring a Kelvin connection for accurate current sensing."
},
{
"number": "15",
"name": "ISN",
"type": "input",
"description": "Negative terminal of the ISP/ISN current sense resistor (RIS), requiring a Kelvin connection for accurate current sensing."
},
{
"number": "16",
"name": "ISMON",
"type": "output",
"description": "ISP/ISN current sense monitor output equal to ten times V(ISP-ISN) plus a 0.25V offset, and tied from master ISMON to slave CTRL in parallel applications."
},
{
"number": "17",
"name": "PGOOD",
"type": "output",
"description": "Open-drain power good output that is pulled low when FB is within ±10% of the final regulation voltage and requires an external pull-up resistor."
},
{
"number": "18",
"name": "SS",
"type": "passive",
"description": "Soft-start timer pin with a 12.5µA internal pull-up, where a 0.1µF capacitor is recommended and a resistor to VREF selects hiccup, latch-off (499kΩ) or keep-running (100kΩ) short-circuit fault mode."
},
{
"number": "19",
"name": "FB",
"type": "input",
"description": "Voltage loop feedback input that regulates to 1.00V, where VFB below 0.25V triggers the short-circuit fault mode and VFB above 1.1V turns off TG1, BG1, TG2, BG2 and LOADTG."
},
{
"number": "20",
"name": "VC",
"type": "passive",
"description": "Error amplifier output that sets the inductor current comparator threshold and is compensated with an external RC network."
},
{
"number": "21",
"name": "RT",
"type": "passive",
"description": "Switching frequency setting pin, where a resistor to ground sets the internal oscillator frequency from 150kHz to 650kHz."
},
{
"number": "22",
"name": "SYNC/SPRD",
"type": "input",
"description": "Grounded for internal oscillator frequency, driven by a clock for external synchronization, or tied to INTVCC for ±15% triangle spread spectrum."
},
{
"number": "23",
"name": "LOADTG",
"type": "output",
"description": "High side PMOS load switch top gate drive, a buffered inverted LOADEN signal swinging from the higher of (VOUT-5V) and 1.2V up to VOUT, left unconnected if not used."
},
{
"number": "24",
"name": "VOUT",
"type": "power_in",
"description": "Output supply that must be tied to the power output to set buck, buck-boost or boost regions and serves as the positive rail for LOADTG, bypassed with a minimum 1µF ceramic capacitor."
},
{
"number": "25",
"name": "TG2",
"type": "output",
"description": "Boost side top N-channel MOSFET gate drive, swinging from SW2 to BST2."
},
{
"number": "26",
"name": "SW2",
"type": "output",
"description": "Boost side switch node that swings from a Schottky diode drop below ground up to VOUT."
},
{
"number": "27",
"name": "BST2",
"type": "power_out",
"description": "Boost side bootstrap floating driver supply with an integrated Schottky diode from INTVCC, requiring an external bootstrap capacitor to SW2 and swinging from a diode drop below INTVCC to (VOUT + INTVCC)."
},
{
"number": "28",
"name": "BG2",
"type": "output",
"description": "Boost side bottom N-channel MOSFET gate drive, swinging from ground to INTVCC."
},
{
"number": "29",
"name": "GND",
"type": "power_in",
"description": "Exposed pad ground that must be soldered directly to the ground plane."
}
],
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"primary_model": "claude-haiku-5-5",
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"guards": "pin_guards 0.1: passed",
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"extractor flagged: The TSSOP top-view text was extracted without explicit per-pin coordinates. Pin numbers 1-14 (left c; Pin types are KiCad-class choices made from the pin function descriptions, since the datasheet does ",
"15/29 pins cited to the wrong page (name found elsewhere): ['3:SW1@p10', '6:LSN@p10', '13:CTRL@p10', '14:ISP@p10']"
],
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"at": "2026-10-18T01:41:51"
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"sha256": "b28ebec4c561175d",
"source_tier": "lcsc"
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"metadata": {
"specs": {
"Manufacturer": "Analog Devices",
"Package": "HTSSOP-28",
"Category": "Power Management (PMIC)",
"Pins": "29"
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"source": "datasheet",
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"rows": [
{
"name": "VIN, EN/UVLO, VOUT, ISP, ISN voltage",
"symbol": "VIN",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 60,
"conditions": "",
"source_page": 2,
"source": "datasheet"
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{
"name": "(ISP-ISN) differential voltage",
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{
"name": "SW1, SW2, LSP, LSN voltage",
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{
"name": "INTVCC, (BST1-SW1), (BST2-SW2) voltage",
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{
"name": "(BST1-LSP), (BST1-LSN) voltage",
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"unit": "V",
"min": null,
"typ": null,
"max": 6,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "FB, LOADEN, SYNC/SPRD, CTRL, PGOOD voltage",
"symbol": "FB",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 6,
"conditions": "",
"source_page": 2,
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{
"name": "Operating junction temperature range, LT8390E",
"symbol": "TJ",
"kind": "recommended_operating",
"unit": "°C",
"min": -40,
"typ": null,
"max": 125,
"conditions": "LT8390E grade",
"source_page": 2,
"source": "datasheet"
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{
"name": "Storage temperature range",
"symbol": "Tstg",
"kind": "absolute_maximum",
"unit": "°C",
"min": -65,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "VIN Operating Voltage Range",
"symbol": "",
"kind": "recommended_operating",
"unit": "V",
"min": 4,
"typ": null,
"max": 60,
"conditions": "",
"source_page": 3,
"source": "datasheet"
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{
"name": "VIN Quiescent Current",
"symbol": "",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 1,
"max": 2,
"conditions": "VEN/UVLO = 0.3V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "VIN Quiescent Current, not switching",
"symbol": "",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 2.1,
"max": 2.8,
"conditions": "Not Switching",
"source_page": 3,
"source": "datasheet"
},
{
"name": "INTVCC Regulation Voltage",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": 4.85,
"typ": 5,
"max": 5.15,
"conditions": "IINTVCC = 20mA",
"source_page": 3,
"source": "datasheet"
},
{
"name": "INTVCC Current Limit",
"symbol": "",
"kind": "electrical",
"unit": "mA",
"min": 80,
"typ": 110,
"max": 160,
"conditions": "VINTVCC = 4.5V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "INTVCC Undervoltage Lockout Threshold",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": 3.44,
"typ": 3.54,
"max": 3.64,
"conditions": "Falling",
"source_page": 3,
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},
{
"name": "VREF Regulation Voltage",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": 1.97,
"typ": 2,
"max": 2.03,
"conditions": "IVREF = 100µA",
"source_page": 3,
"source": "datasheet"
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{
"name": "VREF Undervoltage Lockout Threshold",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": 1.78,
"typ": 1.84,
"max": 1.9,
"conditions": "Falling",
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"source": "datasheet"
},
{
"name": "EN/UVLO Shutdown Threshold",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": 0.3,
"typ": 0.6,
"max": 1,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "EN/UVLO Enable Threshold",
"symbol": "",
"kind": "electrical",
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"min": 1.196,
"typ": 1.22,
"max": 1.244,
"conditions": "Falling",
"source_page": 3,
"source": "datasheet"
},
{
"name": "CTRL Input Bias Current",
"symbol": "",
"kind": "electrical",
"unit": "nA",
"min": 0,
"typ": 20,
"max": 50,
"conditions": "VCTRL = 0.75V, current out of pin",
"source_page": 3,
"source": "datasheet"
},
{
"name": "CTRL Latch-Off Threshold",
"symbol": "",
"kind": "electrical",
"unit": "mV",
"min": 285,
"typ": 300,
"max": 315,
"conditions": "Falling",
"source_page": 3,
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},
{
"name": "LOADEN Threshold",
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"min": 1.3,
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"max": 1.5,
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{
"name": "Minimum VOUT for LOADTG to be On",
"symbol": "",
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"min": null,
"typ": 2.4,
"max": 3,
"conditions": "VLOADEN = 5V",
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{
"name": "LOADTG On Voltage V(VOUT-LOADTG)",
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{
"name": "LOADTG Off Voltage V(VOUT-LOADTG)",
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"unit": "V",
"min": -0.1,
"typ": 0,
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"conditions": "VOUT = 12V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Full Scale Current Regulation V(ISP-ISN)",
"symbol": "",
"kind": "electrical",
"unit": "mV",
"min": 97,
"typ": 100,
"max": 103,
"conditions": "VCTRL = 2V, VISP = 12V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "ISMON Monitor Output VISMON",
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"min": 1.2,
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"max": 1.3,
"conditions": "V(ISP-ISN) = 100mV, VISP = 12V/0V",
"source_page": 4,
"source": "datasheet"
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{
"name": "ISMON Monitor Output VISMON",
"symbol": "VISMON",
"kind": "electrical",
"unit": "V",
"min": 0.3,
"typ": 0.35,
"max": 0.4,
"conditions": "V(ISP-ISN) = 10mV, VISP = 12V/0V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "ISMON Monitor Output VISMON",
"symbol": "VISMON",
"kind": "electrical",
"unit": "V",
"min": 0.2,
"typ": 0.25,
"max": 0.3,
"conditions": "V(ISP-ISN) = 0mV, VISP = 12V/0V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "ISP/ISN Input Common Mode Range",
"symbol": "",
"kind": "recommended_operating",
"unit": "V",
"min": 0,
"typ": null,
"max": 60,
"conditions": "",
"source_page": 4,
"source": "datasheet"
},
{
"name": "FB Regulation Voltage",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": 0.985,
"typ": 1,
"max": 1.015,
"conditions": "VC = 1.2V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Maximum Current Sense Threshold V(LSP-LSN), Buck",
"symbol": "",
"kind": "electrical",
"unit": "mV",
"min": 35,
"typ": 50,
"max": 65,
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