component
LP87332ARHDRQ1
Public Made by Adomby adom
Texas Instruments DC-DC Converters, VQFN-28-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"title": "LP87332ARHDRQ1",
"brief": "Texas Instruments DC-DC Converters, VQFN-28-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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"package": "VQFN-28-EP(5x5)",
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"category": "Power Management (PMIC)",
"subcategory": "DC-DC Converters",
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"pins": [
{
"number": "1",
"name": "VOUT_LDO0",
"type": "power_out",
"description": "LDO0 output; leave floating if LDO0 is not used."
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{
"number": "2",
"name": "FB_B0",
"type": "input",
"description": "Positive output-voltage feedback input for Buck 0."
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{
"number": "3",
"name": "FB_B1",
"type": "input",
"description": "Positive output-voltage feedback input for Buck 1."
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{
"number": "4",
"name": "AGND",
"type": "power_in",
"description": "Ground."
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{
"number": "5",
"name": "VANA",
"type": "power_in",
"description": "Supply voltage for analog and digital blocks; must be connected to the same node as VIN_Bx."
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{
"number": "6",
"name": "EN",
"type": "input",
"description": "Programmable enable signal for regulators and GPOs; leave floating if not used."
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{
"number": "7",
"name": "VOUT_LDO1",
"type": "power_out",
"description": "LDO1 output; leave floating if LDO1 is not used."
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{
"number": "8",
"name": "VIN_LDO1",
"type": "power_in",
"description": "Power input for LDO1; connect to VANA if LDO1 is not used."
},
{
"number": "9",
"name": "nINT",
"type": "output",
"description": "Open-drain interrupt output, active LOW; connect to ground if not used."
},
{
"number": "10",
"name": "CLKIN",
"type": "bidirectional",
"description": "External clock input, alternatively general-purpose digital output GPO2; leave floating if not used."
},
{
"number": "11",
"name": "VIN_B1",
"type": "power_in",
"description": "Input for Buck 1; VIN_Bx pins are not connected together internally and must be connected together externally and locally bypassed."
},
{
"number": "12",
"name": "VIN_B1",
"type": "power_in",
"description": "Input for Buck 1; VIN_Bx pins are not connected together internally and must be connected together externally and locally bypassed."
},
{
"number": "13",
"name": "SW_B1",
"type": "power_out",
"description": "Buck 1 switch node; leave floating if Buck 1 is not used."
},
{
"number": "14",
"name": "SW_B1",
"type": "power_out",
"description": "Buck 1 switch node; leave floating if Buck 1 is not used."
},
{
"number": "15",
"name": "PGND_B1",
"type": "power_in",
"description": "Power ground for Buck 1."
},
{
"number": "16",
"name": "PGND_B1",
"type": "power_in",
"description": "Power ground for Buck 1."
},
{
"number": "17",
"name": "SCL",
"type": "input",
"description": "Serial interface clock input for I2C access; connect a pullup resistor, or connect to ground if I2C is not used."
},
{
"number": "18",
"name": "SDA",
"type": "bidirectional",
"description": "Serial interface data input and output for I2C access; connect a pullup resistor, or connect to ground if I2C is not used."
},
{
"number": "19",
"name": "SGND",
"type": "power_in",
"description": "Ground."
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{
"number": "20",
"name": "PGND_B0",
"type": "power_in",
"description": "Power ground for Buck 0."
},
{
"number": "21",
"name": "PGND_B0",
"type": "power_in",
"description": "Power ground for Buck 0."
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{
"number": "22",
"name": "SW_B0",
"type": "power_out",
"description": "Buck 0 switch node; leave floating if Buck 0 is not used."
},
{
"number": "23",
"name": "SW_B0",
"type": "power_out",
"description": "Buck 0 switch node; leave floating if Buck 0 is not used."
},
{
"number": "24",
"name": "VIN_B0",
"type": "power_in",
"description": "Input for Buck 0; VIN_Bx pins are not connected together internally and must be connected together externally and locally bypassed."
},
{
"number": "25",
"name": "VIN_B0",
"type": "power_in",
"description": "Input for Buck 0; VIN_Bx pins are not connected together internally and must be connected together externally and locally bypassed."
},
{
"number": "26",
"name": "GPO",
"type": "output",
"description": "General-purpose digital output; leave floating if not used."
},
{
"number": "27",
"name": "PGOOD",
"type": "output",
"description": "Power-good indication signal; leave floating if not used."
},
{
"number": "28",
"name": "VIN_LDO0",
"type": "power_in",
"description": "Power input for LDO0; connect to VANA if LDO0 is not used."
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{
"number": "29",
"name": "EP",
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"description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
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"at": "2026-11-05T22:50:43"
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"specs": {
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"Package": "VQFN-28-EP(5x5)",
"Category": "Power Management (PMIC)",
"Pins": "29"
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"name": "Voltage on power connections (VIN_Bx, VANA)",
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{
"name": "Input voltage on LDO inputs VIN_LDOx",
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"typ": null,
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{
"name": "Voltage on logic pins EN, nINT",
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{
"name": "Voltage on I2C interface SCL, SDA",
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"name": "Junction temperature",
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"min": -40,
"typ": null,
"max": 140,
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"source_page": 5,
"source": "datasheet"
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{
"name": "Ambient temperature",
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"kind": "recommended_operating",
"unit": "°C",
"min": -40,
"typ": null,
"max": 125,
"conditions": "",
"source_page": 5,
"source": "datasheet"
},
{
"name": "Input filtering capacitance for buck regulators",
"symbol": "CIN_BUCK",
"kind": "electrical",
"unit": "µF",
"min": 1.9,
"typ": null,
"max": 10,
"conditions": "Effective capacitance, connected from VIN_Bx to PGND_Bx",
"source_page": 6,
"source": "datasheet"
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{
"name": "Output filtering capacitance for buck regulators",
"symbol": "COUT_BUCK",
"kind": "electrical",
"unit": "µF",
"min": 10,
"typ": 22,
"max": 500,
"conditions": "Effective capacitance",
"source_page": 6,
"source": "datasheet"
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{
"name": "Buck output capacitance, total (local and POL)",
"symbol": "COUT-TOTAL_BUCK",
"kind": "electrical",
"unit": "µF",
"min": null,
"typ": null,
"max": 500,
"conditions": "Total output capacitance",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Input filtering capacitance for LDO regulators",
"symbol": "CIN_LDO",
"kind": "electrical",
"unit": "µF",
"min": 0.6,
"typ": null,
"max": 2.2,
"conditions": "Effective capacitance, connected from VIN_LDOx to AGND",
"source_page": 6,
"source": "datasheet"
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{
"name": "Output filtering capacitance for LDO regulators",
"symbol": "COUT_LDO",
"kind": "electrical",
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"min": 0.4,
"typ": 1,
"max": 2.7,
"conditions": "Effective capacitance",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Input and output capacitor ESR",
"symbol": "ESRC",
"kind": "electrical",
"unit": "mΩ",
"min": 2,
"typ": null,
"max": 10,
"conditions": "[1-10] MHz",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Inductance tolerance",
"symbol": "L",
"kind": "tolerance",
"unit": "%",
"min": -30,
"typ": null,
"max": 30,
"conditions": "Inductance of the inductor",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Input voltage range",
"symbol": "V(VIN_Bx), V(VANA)",
"kind": "electrical",
"unit": "V",
"min": 2.8,
"typ": 3.7,
"max": 5.5,
"conditions": "VIN_Bx and VANA pins must be connected to the same supply line",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Output voltage programmable range",
"symbol": "VOUT_Bx",
"kind": "electrical",
"unit": "V",
"min": 0.7,
"typ": 1,
"max": 3.36,
"conditions": "Programmable voltage range",
"source_page": 6,
"source": "datasheet"
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{
"name": "Output current",
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"kind": "electrical",
"unit": "A",
"min": null,
"typ": null,
"max": 3,
"conditions": "Output current",
"source_page": 6,
"source": "datasheet"
},
{
"name": "DC output voltage accuracy",
"symbol": "VOUT_Bx_DC",
"kind": "electrical",
"unit": "mV",
"min": -20,
"typ": null,
"max": 20,
"conditions": "Force PWM mode, VOUT < 1 V",
"source_page": 7,
"source": "datasheet"
},
{
"name": "DC output voltage accuracy",
"symbol": "VOUT_Bx_DC",
"kind": "electrical",
"unit": "%",
"min": -2,
"typ": null,
"max": 2,
"conditions": "Force PWM mode, VOUT ≥ 1 V",
"source_page": 7,
"source": "datasheet"
},
{
"name": "DC output voltage accuracy in PFM mode",
"symbol": "VOUT_Bx_DC",
"kind": "electrical",
"unit": "mV",
"min": -20,
"typ": null,
"max": 40,
"conditions": "PFM mode, VOUT < 1 V, the average output voltage level is increased by max. 20 mV",
"source_page": 7,
"source": "datasheet"
},
{
"name": "DC output voltage accuracy in PFM mode",
"symbol": "VOUT_Bx_DC",
"kind": "electrical",
"unit": "%",
"min": -2,
"typ": null,
"max": null,
"conditions": "PFM mode, VOUT ≥ 1 V, the average output voltage level is increased by max. 20 mV; printed max is 2% + 20 mV",
"source_page": 7,
"source": "datasheet"
},
{
"name": "DC line regulation",
"symbol": "DCLNR",
"kind": "electrical",
"unit": "%/V",
"min": -0.05,
"typ": null,
"max": 0.05,
"conditions": "IOUT = 1 A",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Transient load step response",
"symbol": "TLDSR",
"kind": "electrical",
"unit": "mV",
"min": -55,
"typ": null,
"max": 55,
"conditions": "IOUT = 0.1 A to 2 A, TR = TF = 400 ns, PWM mode",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Forward current limit per phase",
"symbol": "ILIM FWD",
"kind": "electrical",
"unit": "A",
"min": 1.5,
"typ": null,
"max": 4,
"conditions": "Programmable range",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Forward current limit accuracy",
"symbol": "ILIM FWD",
"kind": "electrical",
"unit": "%",
"min": -5,
"typ": 7.5,
"max": 20,
"conditions": "V(VIN_Bx) ≥ 3 V, ILIM = 4 A",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Forward current limit accuracy",
"symbol": "ILIM FWD",
"kind": "electrical",
"unit": "%",
"min": -20,
"typ": 7.5,
"max": 20,
"conditions": "2.8 V ≤ V(VIN_Bx) < 3 V, ILIM = 4 A",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Negative current limit per phase",
"symbol": "ILIM NEG",
"kind": "electrical",
"unit": "A",
"min": 1.6,
"typ": 2,
"max": 3,
"conditions": "",
"source_page": 7,
"source": "datasheet"
},
{
"name": "On-resistance, high-side FET",
"symbol": "RDS(ON) HS",
"kind": "electrical",
"unit": "mΩ",
"min": null,
"typ": 50,
"max": 110,
"conditions": "Each phase, between VIN_Bx and SW_Bx pins (I = 1 A)",
"source_page": 7,
"source": "datasheet"
},
{
"name": "On-resistance, low-side FET",
"symbol": "RDS(ON) LS",
"kind": "electrical",
"unit": "mΩ",
"min": null,
"typ": 45,
"max": 90,
"conditions": "Each phase, between SW_Bx and PGND_Bx pins (I = 1 A)",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Switching frequency",
"symbol": "ƒSW",
"kind": "electrical",
"unit": "MHz",
"min": 1.8,
"typ": 2,
"max": 2.2,
"conditions": "PWM mode",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Output pulldown resistance",
"symbol": "RDIS_Bx",
"kind": "electrical",
"unit": "Ω",
"min": 150,
"typ": 250,
"max": 350,
"conditions": "Regulator disabled",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Overvoltage threshold for PGOOD",
"symbol": "",
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