component
LMR33640DDDAR
Public Made by Adomby adom
Texas Instruments DC-DC Converters, SOIC-8-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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lmr33640dddar: specified limits as data (metadata.characteristics, 60 rows from the datasheet)
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26d ago
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{
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"slug": "lmr33640dddar",
"title": "LMR33640DDDAR",
"brief": "Texas Instruments DC-DC Converters, SOIC-8-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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"package": "SOIC-8-EP",
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"category": "Power Management (PMIC)",
"subcategory": "DC-DC Converters",
"datasheet": "https://www.ti.com/cn/lit/gpn/lmr33640",
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{
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"name": "PGND",
"type": "power_in",
"description": "Power ground terminal; connect to system ground, AGND, and bypass capacitor with short wide traces."
},
{
"number": "2",
"name": "VIN",
"type": "power_in",
"description": "Regulator input supply operating from 3.8 V to 36 V; connect high-quality bypass capacitors directly to this pin and PGND."
},
{
"number": "3",
"name": "EN",
"type": "input",
"description": "Enable control input with rising threshold of 1.26 V enabling switching and falling threshold of 0.3 V disabling device; do not float."
},
{
"number": "4",
"name": "PG",
"type": "tri_state",
"description": "Open-drain power-good output indicating regulation status with upper threshold at 107% of FB and lower at 94% of FB; pulls low on fault or during soft start."
},
{
"number": "5",
"name": "FB",
"type": "input",
"description": "Feedback input connected to output voltage divider tap point with nominal reference voltage of 1 V; do not float or ground."
},
{
"number": "6",
"name": "VCC",
"type": "power_out",
"description": "Internal 5-V LDO output regulated from 4.75 V to 5.25 V supplying internal control circuits; connect 1-µF capacitor to PGND and do not load externally."
},
{
"number": "7",
"name": "BOOT",
"type": "power_out",
"description": "Bootstrap supply for internal high-side gate driver with minimum undervoltage threshold of 2.2 V; connect 100-nF capacitor from this pin to SW."
},
{
"number": "8",
"name": "SW",
"type": "output",
"description": "Switching node driven by internal MOSFETs with voltage rating from -0.3 V to 38 V, supporting transients to -3.5 V under 100 ns; connect to power inductor."
},
{
"number": "9",
"name": "EP",
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"description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
}
],
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"consensus_model": "claude-sonnet-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
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],
"pages_sent": 44,
"cost_usd": 0.4327,
"at": "2026-09-23T08:28:20"
},
"datasheet": {
"url": "https://www.ti.com/cn/lit/gpn/lmr33640",
"pages": 44,
"sha256": "6df39cb52faaed45",
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"cad": "KiCad official (CC-BY-SA 4.0)",
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"described": 9,
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}
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"checked": "2026-10-07",
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{
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]
},
"metadata": {
"specs": {
"Manufacturer": "Texas Instruments",
"Package": "SOIC-8-EP",
"Category": "Power Management (PMIC)",
"Pins": "9"
},
"characteristics": {
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"rows": [
{
"name": "VIN to PGND",
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"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
"typ": null,
"max": 38,
"conditions": "",
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},
{
"name": "EN to AGND (max printed as VIN + 0.3)",
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"unit": "V",
"min": -0.3,
"typ": null,
"max": null,
"conditions": "",
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},
{
"name": "FB to AGND",
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"unit": "V",
"min": -0.3,
"typ": null,
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},
{
"name": "PG to AGND",
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{
"name": "AGND to PGND",
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"typ": null,
"max": 0.3,
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},
{
"name": "SW to PGND (max printed as VIN + 0.3)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
"typ": null,
"max": null,
"conditions": "",
"source_page": 5,
"source": "datasheet"
},
{
"name": "SW to PGND less than 100-ns transients",
"symbol": "",
"kind": "absolute_maximum",
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"min": -3.5,
"typ": null,
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"conditions": "less than 100-ns transients",
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},
{
"name": "BOOT to SW",
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"min": -0.3,
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},
{
"name": "VCC to AGND",
"symbol": "",
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"unit": "V",
"min": -0.3,
"typ": null,
"max": 5.5,
"conditions": "",
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},
{
"name": "Junction temperature",
"symbol": "TJ",
"kind": "absolute_maximum",
"unit": "°C",
"min": -40,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Storage temperature",
"symbol": "Tstg",
"kind": "absolute_maximum",
"unit": "°C",
"min": -55,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 5,
"source": "datasheet"
},
{
"name": "VIN to PGND (recommended operating input voltage)",
"symbol": "",
"kind": "recommended_operating",
"unit": "V",
"min": 3.8,
"typ": null,
"max": 36,
"conditions": "",
"source_page": 5,
"source": "datasheet"
},
{
"name": "EN (max printed as VIN)",
"symbol": "",
"kind": "recommended_operating",
"unit": "V",
"min": 0,
"typ": null,
"max": null,
"conditions": "",
"source_page": 5,
"source": "datasheet"
},
{
"name": "PG",
"symbol": "",
"kind": "recommended_operating",
"unit": "V",
"min": 0,
"typ": null,
"max": 18,
"conditions": "",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Adjustable output voltage",
"symbol": "VOUT",
"kind": "recommended_operating",
"unit": "V",
"min": 1,
"typ": null,
"max": 24,
"conditions": "",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Output current",
"symbol": "IOUT",
"kind": "recommended_operating",
"unit": "A",
"min": 0,
"typ": null,
"max": 4,
"conditions": "",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Minimum operating input voltage",
"symbol": "VIN",
"kind": "electrical",
"unit": "V",
"min": 3.8,
"typ": null,
"max": null,
"conditions": "",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Non-switching input current, measured at VIN pin",
"symbol": "IQ",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 24,
"max": 34,
"conditions": "VFB = 1.2 V",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Shutdown quiescent current, measured at VIN pin",
"symbol": "ISD",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 5,
"max": 10,
"conditions": "EN = 0 V",
"source_page": 6,
"source": "datasheet"
},
{
"name": "EN input level required to start switching (rising threshold)",
"symbol": "VEN-H",
"kind": "electrical",
"unit": "V",
"min": 1.2,
"typ": 1.231,
"max": 1.26,
"conditions": "Rising threshold",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Internal LDO output voltage at VCC pin",
"symbol": "VCC",
"kind": "electrical",
"unit": "V",
"min": 4.75,
"typ": 5,
"max": 5.25,
"conditions": "6 V ≤ VIN ≤ 36 V",
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"source": "datasheet"
},
{
"name": "Feedback voltage; ADJ option",
"symbol": "VFB",
"kind": "electrical",
"unit": "V",
"min": 0.985,
"typ": 1,
"max": 1.015,
"conditions": "ADJ option",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Current into FB pin; ADJ option",
"symbol": "IFB",
"kind": "electrical",
"unit": "nA",
"min": null,
"typ": 0.2,
"max": 50,
"conditions": "ADJ option, FB = 1 V",
"source_page": 6,
"source": "datasheet"
},
{
"name": "High-side current limit",
"symbol": "ISC",
"kind": "electrical",
"unit": "A",
"min": 4.8,
"typ": 5.5,
"max": 6.2,
"conditions": "LMR33640",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Low-side current limit",
"symbol": "ILIMIT",
"kind": "electrical",
"unit": "A",
"min": 3.9,
"typ": 4.5,
"max": 5,
"conditions": "LMR33640",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Internal soft-start time",
"symbol": "tSS",
"kind": "electrical",
"unit": "ms",
"min": 2.9,
"typ": 4,
"max": 6,
"conditions": "",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Power-good upper threshold, rising",
"symbol": "VPG-HIGH-UP",
"kind": "electrical",
"unit": "%",
"min": 105,
"typ": 107,
"max": 110,
"conditions": "% of FB voltage, rising",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Power-good upper threshold, falling",
"symbol": "VPG-HIGH-DN",
"kind": "electrical",
"unit": "%",
"min": 103,
"typ": 105,
"max": 108,
"conditions": "% of FB voltage, falling",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Power-good lower threshold, rising",
"symbol": "VPG-LOW-UP",
"kind": "electrical",
"unit": "%",
"min": 92,
"typ": 94,
"max": 97,
"conditions": "% of FB voltage, rising",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Power-good lower threshold, falling",
"symbol": "VPG-LOW-DN",
"kind": "electrical",
"unit": "%",
"min": 90,
"typ": 92,
"max": 95,
"conditions": "% of FB voltage, falling",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Power-good glitch filter delay",
"symbol": "tPG",
"kind": "electrical",
"unit": "µs",
"min": null,
"typ": 60,
"max": 170,
"conditions": "",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Power-good flag RDSON",
"symbol": "RPG",
"kind": "electrical",
"unit": "Ω",
"min": null,
"typ": 76,
"max": 150,
"conditions": "VIN = 12 V, VEN = 4 V",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Power-good flag RDSON",
"symbol": "RPG",
"kind": "electrical",
"unit": "Ω",
"min": null,
"typ": 35,
"max": 60,
"conditions": "VEN = 0 V",
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"source": "datasheet"
},
{
"name": "Minimum input voltage for proper PG function",
"symbol": "VIN-PG",
"kind": "electrical",
"unit": "V",
"min": 2,
"typ": null,
"max": null,
"conditions": "50-µA, EN = 0 V",
"source_page": 7,
"source": "datasheet"
},
{
"name": "PG logic low output",
"symbol": "VPG",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 0.2,
"conditions": "50-µA, EN = 0 V, VIN = 2V",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Switching frequency (DDDA 1000 kHz option)",
"symbol": "ƒSW",
"kind": "electrical",
"unit": "kHz",
"min": 860,
"typ": 1000,
"max": 1140,
"conditions": "",
"source_page": 7,
"source": "datasheet"
},
{
"name": "High-side MOSFET ON-resistance, DDA package",
"symbol": "RDS-ON-HS",
"kind": "electrical",
"unit": "mΩ",
"min": null,
"typ": 95,
"max": 160,
"conditions": "DDA package",
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"source": "datasheet"
},
{
"name": "Low-side MOSFET ON-resistance, DDA package",
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"kind": "electrical",
"unit": "mΩ",
"min": null,
"typ": 66,
"max": 110,
"conditions": "DDA package",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Minimum switch on-time, DDA package",
"symbol": "tON-MIN",
"kind": "timing",
"unit": "ns",
"min": null,
"typ": 75,
"max": 108,
"conditions": "DDA package",
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"source": "datasheet"
},
{
"name": "Minimum switch off-time, DDA package",
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"min": null,
"typ": 50,
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},
{
"name": "Maximum switch on-time",
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"typ": 7,
"max": 9,
"conditions": "",
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"source": "datasheet"
},
{
"name": "Output voltage regulation for VOUT = 5 V",
"symbol": "VOUT",
"kind": "electrical",
"unit": "%",
"min": -1.6,
"typ": null,
"max": 2.5,
"conditions": "VOUT = 5 V, VIN = 7 V to 36 V, IOUT = 0 A to 4 A",
"source_page": 8,
"source": "datasheet"
},
{
"name": "Output voltage regulation for VOUT = 5 V",
"symbol": "VOUT",
"kind": "electrical",
"unit": "%",
"min": -1.6,
"typ": null,
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"conditions": "VOUT = 5 V, VIN = 7 V to 36 V, IOUT = 1 A to 4 A",
"source_page": 8,
"source": "datasheet"
},
{
"name": "Output voltage regulation for VOUT = 3.3 V",
"symbol": "VOUT",
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"typ": null,
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"conditions": "VOUT = 3.3 V, VIN = 3.8 V to 36 V, IOUT = 0 A to 4 A",
"source_page": 8,
"source": "datasheet"
},
{
"name": "Output voltage regulation for VOUT = 3.3 V",
"symbol": "VOUT",
"kind": "electrical",
"unit": "%",
"min": -1.6,
"typ": null,
"max": 1.5,
"conditions": "VOUT = 3.3 V, VIN = 3.8 V to 36 V, IOUT = 1 A to 4 A",
"source_page": 8,
"source": "datasheet"
},
{
"name": "EN input level required to turn on internal LDO (rising threshold)",
"symbol": "VEN-VCC-H",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": 1,
"max": null,
"conditions": "Rising threshold",
"source_page": 6,
"source": "datasheet"
},
{
"name": "EN input level required to turn off internal LDO (falling threshold)",
"symbol": "VEN-VCC-L",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": 0.3,
"max": null,
"conditions": "Falling threshold",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Hysteresis below VEN-H",
"symbol": "VEN-HYS",
"kind": "electrical",
"unit": "mV",
"min": null,
"typ": 100,
"max": null,
"conditions": "Hysteresis below VEN-H; falling",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Enable input leakage current",
"symbol": "ILKG-EN",
"kind": "electrical",
"unit": "nA",
"min": null,
"typ": 0.2,
"max": null,
"conditions": "VEN = 3.3 V",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Bootstrap voltage undervoltage lock-out threshold",
"symbol": "VBOOT-UVLO",
"kind": "electrical",
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