component
RT8231AGQW
Public Made by Adomby adom
Richtek Tech DC-DC Converters, WQFN-20-EP(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"number": "1",
"name": "VTTGND",
"type": "power_in",
"description": "Power ground for the VTT LDO."
},
{
"number": "2",
"name": "VTTSNS",
"type": "input",
"description": "Voltage sense input for the VTT LDO; connect to the terminal of the VTT_LDO output capacitor."
},
{
"number": "3",
"name": "GND",
"type": "power_in",
"description": "Exposed pad must be soldered to a large PCB and connected to GND for maximum power dissipation."
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{
"number": "4",
"name": "VTTREF",
"type": "output",
"description": "VTTREF buffered reference output."
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{
"number": "5",
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"type": "input",
"description": "Reference input for VTT and VTTREF."
},
{
"number": "6",
"name": "FB",
"type": "input",
"description": "Feedback voltage input; connect to a resistive voltage divider from VDDQ to GND to adjust the output voltage."
},
{
"number": "7",
"name": "S3",
"type": "input",
"description": "VTT LDO enable control input; do not leave this pin floating."
},
{
"number": "8",
"name": "S5",
"type": "input",
"description": "PWM enable control input; do not leave this pin floating."
},
{
"number": "9",
"name": "TON",
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"description": "Sets the UGATE on-time through a pull-up resistor connected to VIN."
},
{
"number": "10",
"name": "PGOOD",
"type": "output",
"description": "Power good open-drain output; high when the VDDQ output voltage is within the target range."
},
{
"number": "11",
"name": "VID",
"type": "input",
"description": "Internal reference voltage setting input."
},
{
"number": "12",
"name": "VDD",
"type": "power_in",
"description": "Supply voltage input for the analog supply and LGATE gate driver."
},
{
"number": "13",
"name": "CS",
"type": "input",
"description": "Current limit threshold setting input; connect to GND through the voltage setting resistor."
},
{
"number": "14",
"name": "PGND",
"type": "power_in",
"description": "Power ground for the low-side MOSFET."
},
{
"number": "15",
"name": "LGATE",
"type": "output",
"description": "Low-side gate driver output for VDDQ."
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{
"number": "16",
"name": "PHASE",
"type": "passive",
"description": "Switch node connected to the external inductor for VDDQ; also serves as the current sense comparator input for low-side MOSFET RDS(ON) sensing."
},
{
"number": "17",
"name": "UGATE",
"type": "output",
"description": "High-side gate driver output for VDDQ."
},
{
"number": "18",
"name": "BOOT",
"type": "power_out",
"description": "Bootstrap supply for the high-side gate driver."
},
{
"number": "19",
"name": "VLDOIN",
"type": "power_in",
"description": "Power supply input for the VTT LDO."
},
{
"number": "20",
"name": "VTT",
"type": "power_out",
"description": "Power output of the VTT LDO."
},
{
"number": "21",
"name": "GND",
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"description": "Exposed pad, which must be soldered to a large PCB and connected to GND for maximum power dissipation."
}
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"Package": "WQFN-20-EP(3x3)",
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{
"name": "LGATE to GND",
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"name": "UGATE to PHASE",
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"name": "VDD, CS, S3, S5, VTTSNS, VDDQ, VID, VTTREF, VTT, VLDOIN, FB, PGOOD to GND",
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"name": "PGND, VTTGND to GND",
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{
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{
"name": "Power Dissipation, PD (WQFN-20L 3x3)",
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{
"name": "Package Thermal Resistance, junction to ambient (WQFN-20L 3x3)",
"symbol": "θJA",
"kind": "thermal",
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"conditions": "Measured at exposed pad",
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{
"name": "IVLDOIN Standby Current",
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"kind": "electrical",
"unit": "μA",
"min": null,
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"max": 10,
"conditions": "VS5 = 5V, VS3 = 0, VTT = no load",
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{
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"conditions": "VS5 = VS3 = 0V",
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{
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{
"name": "Shutdown Current (VLDOIN)",
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"conditions": "VS5 = VS3 = 0V",
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{
"name": "Shutdown Current (VID)",
"symbol": "ISHDN",
"kind": "electrical",
"unit": "μA",
"min": null,
"typ": 0.5,
"max": 1,
"conditions": "VS5 = VS3 = 0V",
"source_page": 7,
"source": "datasheet"
},
{
"name": "FB Error Comparator Threshold VREF",
"symbol": "VREF",
"kind": "tolerance",
"unit": "%",
"min": -1,
"typ": 0,
"max": 1,
"conditions": "VREF = 0.675V/0.75V",
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"source": "datasheet"
},
{
"name": "VDDQ Voltage Range",
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"typ": null,
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},
{
"name": "Switch Frequency",
"symbol": "fSW",
"kind": "electrical",
"unit": "kHz",
"min": 320,
"typ": 400,
"max": 480,
"conditions": "RTON = 620k, VIN = 12V, VDDQ = 1.5V, IOUT = 20A (Note 5)",
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{
"name": "Minimum Off-Time",
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{
"name": "CS Pin Source Current",
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{
"name": "Zero Crossing Threshold",
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"min": 2,
"typ": null,
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"conditions": "GND to PHASE",
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},
{
"name": "Current Limit (Positive)",
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"conditions": "GND to PHASE, RCS = 160k",
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{
"name": "Output UV Threshold",
"symbol": "VUVP",
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"unit": "V",
"min": 0.4,
"typ": 0.45,
"max": 0.5,
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{
"name": "OVP Threshold",
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"min": 110,
"typ": 115,
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{
"name": "VDD POR Threshold",
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"min": 3.9,
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"max": 4.5,
"conditions": "Rising edge, hysteresis = 120mV, PWM disabled below this level",
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},
{
"name": "UGATE Gate Driver Source Resistance",
"symbol": "RUGATEsr",
"kind": "electrical",
"unit": "Ω",
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"max": 5,
"conditions": "BOOT - PHASE forced to 5V",
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{
"name": "UGATE Gate Driver Sink Resistance",
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{
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"conditions": "DL, high state",
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},
{
"name": "LGATE Gate Driver Sink Resistance",
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