component
LT8390EFE#PBF
Public Made by Adomby adom
Analog Devices DC-DC Controllers, TSSOP-28-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"title": "LT8390EFE#PBF",
"brief": "Analog Devices DC-DC Controllers, TSSOP-28-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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"manufacturer": "Analog Devices",
"package": "TSSOP-28-EP",
"pin_count": 29,
"category": "Power Management ICs",
"subcategory": "DC-DC Controllers",
"datasheet": "https://www.analog.com/media/en/technical-documentation/data-sheets/lt8390.pdf",
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"pins": [
{
"number": "1",
"name": "BG1",
"type": "output",
"description": "Buck side bottom gate drive for the buck side bottom N-channel MOSFET, swinging from ground to INTVCC."
},
{
"number": "2",
"name": "BST1",
"type": "passive",
"description": "Buck side bootstrap floating driver supply with integrated Schottky diode from INTVCC, needs an external capacitor to SW1 and swings from a diode drop below INTVCC to (VIN + INTVCC)."
},
{
"number": "3",
"name": "SW1",
"type": "passive",
"description": "Buck side switch node that swings from a Schottky diode voltage drop below ground up to VIN."
},
{
"number": "4",
"name": "TG1",
"type": "output",
"description": "Buck side top gate drive for the top N-channel MOSFET, swinging from SW1 to BST1."
},
{
"number": "5",
"name": "LSP",
"type": "input",
"description": "Positive terminal of the buck side inductor current sense resistor (RSENSE); use a Kelvin connection."
},
{
"number": "6",
"name": "LSN",
"type": "input",
"description": "Negative terminal of the buck side inductor current sense resistor (RSENSE); use a Kelvin connection."
},
{
"number": "7",
"name": "VIN",
"type": "power_in",
"description": "Input supply (4V to 60V) that must be tied to the power input to determine buck, buck-boost or boost region, bypassed to ground with at least 1µF ceramic."
},
{
"number": "8",
"name": "INTVCC",
"type": "power_out",
"description": "Internal 5V linear regulator output supplied from VIN that powers control circuitry and gate drivers, bypassed to ground with at least 4.7µF ceramic."
},
{
"number": "9",
"name": "EN/UVLO",
"type": "input",
"description": "Enable and undervoltage lockout input; below 0.3V shuts down the part, above 1.233V enables, 1.220V falling threshold with 2.5µA hysteresis current, tie to VIN if unused."
},
{
"number": "10",
"name": "TEST",
"type": "input",
"description": "Factory test pin that must be connected directly to ground for the part to operate properly."
},
{
"number": "11",
"name": "LOADEN",
"type": "input",
"description": "Load switch enable input controlling the high side PMOS load switch; tie to VREF or INTVCC if unused, and low turns off TG1/TG2 and LOADTG and turns on BG1/BG2."
},
{
"number": "12",
"name": "VREF",
"type": "power_out",
"description": "Accurate 2V reference output capable of supplying 1mA, bypassed to ground with a 0.47µF ceramic capacitor."
},
{
"number": "13",
"name": "CTRL",
"type": "input",
"description": "Control input for the ISP/ISN current sense threshold, 100mV full scale for VCTRL of 1.35V or more (tie to VREF), and below 0.3V stops switching."
},
{
"number": "14",
"name": "ISP",
"type": "input",
"description": "Positive terminal of the ISP/ISN current sense resistor (RIS); use a Kelvin connection."
},
{
"number": "15",
"name": "ISN",
"type": "input",
"description": "Negative terminal of the ISP/ISN current sense resistor (RIS); use a Kelvin connection."
},
{
"number": "16",
"name": "ISMON",
"type": "output",
"description": "Current sense monitor output voltage equal to ten times V(ISP-ISN) plus 0.25V offset."
},
{
"number": "17",
"name": "PGOOD",
"type": "output",
"description": "Power good open-drain output pulled low when FB is within ±10% of final regulation voltage, requiring an external pull-up resistor."
},
{
"number": "18",
"name": "SS",
"type": "passive",
"description": "Soft-start timer pin with a capacitor to ground (0.1µF recommended) charged by 12.5µA, and a resistor to VREF selects hiccup (none), latch-off (499kΩ) or keep-running (100kΩ) fault mode."
},
{
"number": "19",
"name": "FB",
"type": "input",
"description": "Voltage loop feedback input regulated to 1.00V, with short condition below 0.25V and overvoltage above 1.1V turning off all gate drives."
},
{
"number": "20",
"name": "VC",
"type": "passive",
"description": "Error amplifier output setting the inductor current comparator threshold, compensated with an external RC network and disconnected from internal loads when LOADEN is low."
},
{
"number": "21",
"name": "RT",
"type": "passive",
"description": "Switching frequency setting pin; a resistor to ground sets the oscillator from 150kHz to 650kHz."
},
{
"number": "22",
"name": "SYNC/SPRD",
"type": "input",
"description": "Ground for internal oscillator frequency, apply a clock for external synchronization, or tie to INTVCC for ±15% triangle spread spectrum."
},
{
"number": "23",
"name": "LOADTG",
"type": "output",
"description": "High side PMOS load switch gate drive, a buffered inverted LOADEN signal swinging from the higher of (VOUT-5V) and 1.2V to VOUT; leave unconnected if unused."
},
{
"number": "24",
"name": "VOUT",
"type": "power_in",
"description": "Output supply pin tied to the power output to determine operation region and serving as positive rail for LOADTG drive, bypassed with at least 1µF ceramic."
},
{
"number": "25",
"name": "TG2",
"type": "output",
"description": "Boost side top gate drive for the top N-channel MOSFET, swinging from SW2 to BST2."
},
{
"number": "26",
"name": "SW2",
"type": "passive",
"description": "Boost side switch node that swings from a Schottky diode voltage drop below ground to VOUT."
},
{
"number": "27",
"name": "BST2",
"type": "passive",
"description": "Boost side bootstrap floating driver supply with integrated Schottky diode from INTVCC, needs an external capacitor to SW2 and swings from a diode drop below INTVCC to (VOUT + INTVCC)."
},
{
"number": "28",
"name": "BG2",
"type": "output",
"description": "Boost side bottom gate drive for the bottom N-channel MOSFET, 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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"extractor": "extract_pins 0.3",
"factory_chain": {
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"extractor": "extract_pins 0.3",
"primary_model": "claude-haiku-5-5",
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"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: The TSSOP top-view pin numbers and names on page 2 are scrambled in the text extraction. The pin-num; Pin types were assigned by function, since the datasheet does not give KiCad ERC classes. BST1, BST2; Pin 29 (exposed pad) is not a numbered lead. It is listed as GND per the page 2 note 'EXPOSED PAD (P",
"13/29 pins cited to the wrong page (name found elsewhere): ['13:CTRL@p10', '14:ISP@p10', '16:BST2@p11', '17:SW2@p11']"
],
"pages_sent": 8,
"cost_usd": 0.0809,
"at": "2026-10-29T01:23:47"
},
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"sha256": "bedb46ecab867bbe",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 29,
"described": 29,
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}
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"metadata": {
"specs": {
"Manufacturer": "Analog Devices",
"Package": "TSSOP-28-EP",
"Category": "Power Management ICs",
"Pins": "29"
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"characteristics": {
"version": 1,
"source": "datasheet",
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"rows": [
{
"name": "VIN, EN/UVLO, VOUT, ISP, ISN",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 60,
"conditions": "",
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{
"name": "(ISP-ISN)",
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"typ": null,
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"conditions": "",
"source_page": 2,
"source": "datasheet"
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{
"name": "SW1, SW2, LSP, LSN",
"symbol": "",
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"min": -6,
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"max": 60,
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{
"name": "INTVCC, (BST1-SW1), (BST2-SW2)",
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{
"name": "(BST1-LSP), (BST1-LSN)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 6,
"conditions": "",
"source_page": 2,
"source": "datasheet"
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{
"name": "FB, LOADEN, SYNC/SPRD, CTRL, PGOOD",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 6,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Operating junction temperature range, LT8390E",
"symbol": "TJ",
"kind": "recommended_operating",
"unit": "°C",
"min": -40,
"typ": null,
"max": 125,
"conditions": "Notes 2, 3",
"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"
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{
"name": "VIN Operating Voltage Range",
"symbol": "",
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"min": 4,
"typ": null,
"max": 60,
"conditions": "",
"source_page": 3,
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{
"name": "VOUT Voltage Range",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": 0,
"typ": null,
"max": 60,
"conditions": "",
"source_page": 3,
"source": "datasheet"
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{
"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"
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{
"name": "INTVCC Undervoltage Lockout Threshold Falling",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": 3.44,
"typ": 3.54,
"max": 3.64,
"conditions": "Falling",
"source_page": 3,
"source": "datasheet"
},
{
"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"
},
{
"name": "VREF Current Limit",
"symbol": "",
"kind": "electrical",
"unit": "mA",
"min": 2,
"typ": 2.5,
"max": 3.2,
"conditions": "VREF = 1.8V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "VREF Undervoltage Lockout Threshold Falling",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": 1.78,
"typ": 1.84,
"max": 1.9,
"conditions": "Falling",
"source_page": 3,
"source": "datasheet"
},
{
"name": "EN/UVLO Shutdown Threshold",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": 0.3,
"typ": 0.6,
"max": 1,
"conditions": "",
"source_page": 4,
"source": "datasheet"
},
{
"name": "EN/UVLO Enable Threshold Falling",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": 1.196,
"typ": 1.22,
"max": 1.244,
"conditions": "Falling",
"source_page": 4,
"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": 4,
"source": "datasheet"
},
{
"name": "CTRL Latch-Off Threshold Falling",
"symbol": "",
"kind": "electrical",
"unit": "mV",
"min": 285,
"typ": 300,
"max": 315,
"conditions": "Falling",
"source_page": 4,
"source": "datasheet"
},
{
"name": "LOADEN Threshold Rising",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": 1.3,
"typ": 1.4,
"max": 1.5,
"conditions": "Rising",
"source_page": 4,
"source": "datasheet"
},
{
"name": "LOADTG On Voltage",
"symbol": "V(VOUT-LOADTG)",
"kind": "electrical",
"unit": "V",
"min": 4.6,
"typ": 5,
"max": 5.6,
"conditions": "VOUT = 12V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "LOADTG Off Voltage",
"symbol": "V(VOUT-LOADTG)",
"kind": "electrical",
"unit": "V",
"min": -0.1,
"typ": 0,
"max": 0.1,
"conditions": "VOUT = 12V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Full Scale Current Regulation",
"symbol": "V(ISP-ISN)",
"kind": "electrical",
"unit": "mV",
"min": 97,
"typ": 100,
"max": 103,
"conditions": "VCTRL = 2V, VISP = 12V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "1/10th Current Regulation",
"symbol": "V(ISP-ISN)",
"kind": "electrical",
"unit": "mV",
"min": 8,
"typ": 10,
"max": 12,
"conditions": "VCTRL = 0.35V, VISP = 12V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "ISMON Monitor Output",
"symbol": "VISMON",
"kind": "electrical",
"unit": "V",
"min": 1.2,
"typ": 1.25,
"max": 1.3,
"conditions": "V(ISP-ISN) = 100mV, VISP = 12V/0V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "ISMON Monitor Output",
"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",
"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": "electrical",
"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": "VC Standby Leakage Current",
"symbol": "",
"kind": "electrical",
"unit": "nA",
"min": -10,
"typ": 0,
"max": 10,
"conditions": "VC = 1.2V, VLOADEN = 0V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Maximum Current Sense Threshold, Buck",
"symbol": "V(LSP-LSN)",
"kind": "electrical",
"unit": "mV",
"min": 35,
"typ": 50,
"max": 65,
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