component
MAX17503ATP+T
Public Made by Adomby adom
Analog Devices Inc Maxim Integrated DC-DC Converters, TQFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"title": "MAX17503ATP+T",
"brief": "Analog Devices Inc Maxim Integrated DC-DC Converters, TQFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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"power management (pmic)",
"max17503atp+t",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "MAX17503ATP+T",
"manufacturer": "Analog Devices Inc Maxim Integrated",
"package": "TQFN-20-EP(4x4)",
"pin_count": 21,
"category": "Power Management (PMIC)",
"subcategory": "DC-DC Converters",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588911637554610176",
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"distributor_links": {
"lcsc": "C2682629",
"digikey": "MAX17503ATP+TTR-ND"
},
"distributor_check": {
"checked_at": "2026-10-17T22:20:22Z",
"source": "Component Ocean /api/assign-pns",
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"pins": [
{
"number": "1",
"name": "VIN",
"type": "power_in",
"description": "Power-supply input with a 4.5V to 60V input supply range; connect the VIN pins together and decouple to PGND with a 2.2µF capacitor placed close to the VIN and PGND pins."
},
{
"number": "2",
"name": "VIN",
"type": "power_in",
"description": "Power-supply input with a 4.5V to 60V input supply range; connect together with the other VIN pins and decouple to PGND with a 2.2µF capacitor placed close to the VIN and PGND pins."
},
{
"number": "3",
"name": "VIN",
"type": "power_in",
"description": "Power-supply input with a 4.5V to 60V input supply range; connect together with the other VIN pins and decouple to PGND with a 2.2µF capacitor placed close to the VIN and PGND pins."
},
{
"number": "4",
"name": "EN/UVLO",
"type": "input",
"description": "Enable/undervoltage lockout: drive high to enable the output, connect to the center of a VIN-to-SGND resistor divider to set the turn-on input voltage, or pull up to VIN for always-on operation."
},
{
"number": "5",
"name": "RESET",
"type": "output",
"description": "Open-drain RESET output that is driven low if FB drops below 92% of its set value and goes high 1024 clock cycles after FB rises above 95% of its set value."
},
{
"number": "6",
"name": "SYNC",
"type": "input",
"description": "External clock synchronization input that synchronizes the device switching frequency to an external clock, as described in the External Frequency Synchronization (SYNC) section."
},
{
"number": "7",
"name": "SS",
"type": "input",
"description": "Soft-start input; connect a capacitor from SS to SGND to set the soft-start time."
},
{
"number": "8",
"name": "CF",
"type": "passive",
"description": "Connect a capacitor from CF to FB at switching frequencies below 500kHz, and leave CF open for switching frequencies of 500kHz or higher."
},
{
"number": "9",
"name": "FB",
"type": "input",
"description": "Feedback input; connect to the center tap of an external resistor divider from the output to GND to set the output voltage."
},
{
"number": "10",
"name": "RT",
"type": "passive",
"description": "Connect a resistor from RT to SGND to set the switching frequency; leave RT open for the default 500kHz frequency."
},
{
"number": "11",
"name": "MODE",
"type": "input",
"description": "Mode select latched at power-up: leave open for PFM, connect to SGND for constant-frequency PWM at all loads, or connect to VCC for constant-frequency DCM at light loads."
},
{
"number": "12",
"name": "VCC",
"type": "power_out",
"description": "5V LDO output that must be bypassed to SGND with 2.2µF ceramic capacitance."
},
{
"number": "13",
"name": "SGND",
"type": "power_in",
"description": "Analog ground; the SGND and PGND pins are connected together at the ground return path of the VCC bypass capacitor."
},
{
"number": "14",
"name": "PGND",
"type": "power_in",
"description": "Power ground; connect externally to the power ground plane and tie to SGND at the return path of the VCC bypass capacitor."
},
{
"number": "15",
"name": "PGND",
"type": "power_in",
"description": "Power ground; connect externally to the power ground plane and tie to SGND at the return path of the VCC bypass capacitor."
},
{
"number": "16",
"name": "PGND",
"type": "power_in",
"description": "Power ground; connect externally to the power ground plane and tie to SGND at the return path of the VCC bypass capacitor."
},
{
"number": "17",
"name": "LX",
"type": "output",
"description": "Switching node connected to the switching side of the inductor; the datasheet specifies LX total RMS current of ±4A absolute maximum."
},
{
"number": "18",
"name": "LX",
"type": "output",
"description": "Switching node connected to the switching side of the inductor; connect all LX pins to the inductor switching side."
},
{
"number": "19",
"name": "LX",
"type": "output",
"description": "Switching node connected to the switching side of the inductor; connect all LX pins to the inductor switching side."
},
{
"number": "20",
"name": "BST",
"type": "passive",
"description": "Boost flying capacitor pin; connect a 0.1µF ceramic capacitor between BST and LX."
},
{
"number": "21",
"name": "EP",
"type": "passive",
"description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
"factory": "2.0.0",
"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: Ordering table (page 26) lists the orderable part MAX17503ATP+ as '20 TQFN 4mm x 4 mm' without an ex; The datasheet's pin table lists pins 1-3, 14-16 and 17-19 as grouped ranges; each pin in those group; The datasheet gives no electrical spec field in this schema context beyond the pin functions; no pin",
"exposed pad 21 added from the footprint",
"dropped thermal pad ['EP'] absent from footprint"
],
"pages_sent": 8,
"cost_usd": 0.0614,
"at": "2026-10-17T22:19:14"
},
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"sha256": "67d45e7c35519621",
"source_tier": "lcsc"
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"pins": {
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"described": 21,
"cites_pages": true,
"refuses_to_fabricate": true
}
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"viewers": {
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"footprint": "viewers/footprint.html"
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"up": "Z",
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"seat": "z = 0",
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4,
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"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "c9476a1612023de37f27b4972110ab6ac6dc0eaf5ac48957a2e1c497650082a5",
"checked": "2026-10-17",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "max17503atp-t-etched.step",
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"metadata": {
"specs": {
"Manufacturer": "Analog Devices Inc Maxim Integrated",
"Package": "TQFN-20-EP(4x4)",
"Category": "Power Management (PMIC)",
"Pins": "21"
},
"appearance": {
"contacts": {
"quote": "Exposed pad. Connect to the SGND pin. Connect to a large copper plane below the IC to improve heat",
"page": 16,
"doc": "ds.pdf",
"material": "copper"
},
"version": 1,
"datasheet_sha256": "67d45e7c35519621b854853acbe5cc1ae9db186b88c8b14f25d23a9c904de180"
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"characteristics": {
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"rows": [
{
"name": "VIN to PGND",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
"typ": null,
"max": 65,
"conditions": "",
"source_page": 2,
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{
"name": "EN/UVLO to SGND",
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"min": -0.3,
"typ": null,
"max": 65,
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{
"name": "LX to PGND (max printed as VIN + 0.3V)",
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{
"name": "BST to PGND",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
"typ": null,
"max": 70,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "BST to LX",
"symbol": "",
"kind": "absolute_maximum",
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"min": -0.3,
"typ": null,
"max": 6.5,
"conditions": "",
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{
"name": "BST to VCC",
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"min": -0.3,
"typ": null,
"max": 65,
"conditions": "",
"source_page": 2,
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{
"name": "CF, RESET, SS, MODE, SYNC, RT to SGND",
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"kind": "absolute_maximum",
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"min": -0.3,
"typ": null,
"max": 6.5,
"conditions": "",
"source_page": 2,
"source": "datasheet"
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{
"name": "FB to SGND",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
"typ": null,
"max": 1.5,
"conditions": "",
"source_page": 2,
"source": "datasheet"
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{
"name": "VCC to SGND",
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"kind": "absolute_maximum",
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"min": -0.3,
"typ": null,
"max": 6.5,
"conditions": "",
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{
"name": "SGND to PGND",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
"typ": null,
"max": 0.3,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "LX Total RMS Current",
"symbol": "",
"kind": "absolute_maximum",
"unit": "A",
"min": -4,
"typ": null,
"max": 4,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Junction Temperature",
"symbol": "",
"kind": "absolute_maximum",
"unit": "ºC",
"min": null,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Storage Temperature Range",
"symbol": "",
"kind": "absolute_maximum",
"unit": "ºC",
"min": -65,
"typ": null,
"max": 160,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Lead Temperature (soldering, 10s)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "ºC",
"min": null,
"typ": null,
"max": 300,
"conditions": "soldering, 10s",
"source_page": 2,
"source": "datasheet"
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{
"name": "Soldering Temperature (reflow)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "ºC",
"min": null,
"typ": null,
"max": 260,
"conditions": "reflow",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Ambient Operating Temperature Range",
"symbol": "TA",
"kind": "recommended_operating",
"unit": "ºC",
"min": -40,
"typ": null,
"max": 125,
"conditions": "High industrial ambient range (features)",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Input Voltage Range",
"symbol": "VIN",
"kind": "electrical",
"unit": "V",
"min": 4.5,
"typ": null,
"max": 60,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Input Shutdown Current",
"symbol": "IIN-SH",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 2.8,
"max": 4.5,
"conditions": "VEN/UVLO = 0V (shutdown mode)",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Input Quiescent Current (DCM)",
"symbol": "IQ-DCM",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 1.16,
"max": 1.8,
"conditions": "DCM mode, VLX = 0.1V",
"source_page": 2,
"source": "datasheet"
},
{
"name": "EN/UVLO Threshold rising",
"symbol": "VENR",
"kind": "electrical",
"unit": "V",
"min": 1.19,
"typ": 1.215,
"max": 1.26,
"conditions": "VEN/UVLO rising",
"source_page": 3,
"source": "datasheet"
},
{
"name": "EN/UVLO Threshold falling",
"symbol": "VENF",
"kind": "electrical",
"unit": "V",
"min": 1.068,
"typ": 1.09,
"max": 1.131,
"conditions": "VEN/UVLO falling",
"source_page": 3,
"source": "datasheet"
},
{
"name": "EN/UVLO Input Leakage Current",
"symbol": "IEN",
"kind": "electrical",
"unit": "nA",
"min": -50,
"typ": 0,
"max": 50,
"conditions": "VEN/UVLO = 0V, TA = +25ºC",
"source_page": 3,
"source": "datasheet"
},
{
"name": "VCC Output Voltage Range",
"symbol": "VCC",
"kind": "electrical",
"unit": "V",
"min": 4.75,
"typ": 5,
"max": 5.25,
"conditions": "6V < VIN < 60V, IVCC = 1mA",
"source_page": 3,
"source": "datasheet"
},
{
"name": "VCC Current Limit",
"symbol": "IVCC-MAX",
"kind": "electrical",
"unit": "mA",
"min": 26.5,
"typ": 54,
"max": 100,
"conditions": "VCC = 4.3V, VIN = 6V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "VCC UVLO rising",
"symbol": "VCC_UVR",
"kind": "electrical",
"unit": "V",
"min": 4.05,
"typ": 4.2,
"max": 4.3,
"conditions": "VCC rising",
"source_page": 3,
"source": "datasheet"
},
{
"name": "VCC UVLO falling",
"symbol": "VCC_UVF",
"kind": "electrical",
"unit": "V",
"min": 3.65,
"typ": 3.8,
"max": 3.9,
"conditions": "VCC falling",
"source_page": 3,
"source": "datasheet"
},
{
"name": "High-Side nMOS On-Resistance",
"symbol": "RDS-ONH",
"kind": "electrical",
"unit": "mΩ",
"min": null,
"typ": 165,
"max": 325,
"conditions": "ILX = 0.3A",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Low-Side nMOS On-Resistance",
"symbol": "RDS-ONL",
"kind": "electrical",
"unit": "mΩ",
"min": null,
"typ": 80,
"max": 150,
"conditions": "ILX = 0.3A",
"source_page": 3,
"source": "datasheet"
},
{
"name": "LX Leakage Current",
"symbol": "ILX_LKG",
"kind": "electrical",
"unit": "µA",
"min": -2,
"typ": null,
"max": 2,
"conditions": "VLX = VIN - 1V, VLX = VPGND + 1V, TA = +25ºC",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Soft-Start Charging Current",
"symbol": "ISS",
"kind": "electrical",
"unit": "µA",
"min": 4.7,
"typ": 5,
"max": 5.3,
"conditions": "VSS = 0.5V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "FB Regulation Voltage",
"symbol": "VFB_REG",
"kind": "electrical",
"unit": "V",
"min": 0.89,
"typ": 0.9,
"max": 0.91,
"conditions": "-40ºC ≤ TA ≤ +125ºC",
"source_page": 3,
"source": "datasheet"
},
{
"name": "FB Input Bias Current",
"symbol": "IFB",
"kind": "electrical",
"unit": "nA",
"min": -50,
"typ": null,
"max": 50,
"conditions": "0 < VFB < 1V, TA = +25ºC",
"source_page": 3,
"source": "datasheet"
},
{
"name": "FB Threshold for Entering Hibernate Mode",
"symbol": "VFB_HBR",
"kind": "electrical",
"unit": "%",
"min": 100.8,
"typ": 102.3,
"max": 103.5,
"conditions": "VFB rising",
"source_page": 3,
"source": "datasheet"
},
{
"name": "FB Threshold for Exiting Hibernate Mode",
"symbol": "VFB_HBF",
"kind": "electrical",
"unit": "%",
"min": 100,
"typ": 101.1,
"max": 102.3,
"conditions": "VFB falling",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Peak Current-Limit Threshold",
"symbol": "IPEAK-LIMIT",
"kind": "electrical",
"unit": "A",
"min": 3.2,
"typ": 3.7,
"max": 4.3,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Runaway Current-Limit Threshold",
"symbol": "IRUNAWAY-LIMIT",
"kind": "electrical",
"unit": "A",
"min": 3.7,
"typ": 4.3,
"max": 5,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Valley Current-Limit Threshold",
"symbol": "ISINK-LIMIT",
"kind": "electrical",
"unit": "A",
"min": -0.16,
"typ": 0,
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