component
LTC4418CUF#TRPBF
Public Made by Adomby adom
Analog Devices Power Distribution Switches, QFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"brief": "Analog Devices Power Distribution Switches, QFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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"name": "TMR",
"type": "passive",
"description": "Validation timer pin: a capacitor of at least 100pF between TMR and GND sets a validation time of 16ms/nF for both channels, connecting TMR to INTVCC gives a 3.5µs minimum (Fast Mode), and it must not be left open."
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{
"number": "2",
"name": "UV1",
"type": "input",
"description": "Channel 1 undervoltage comparator input; falling voltages below 1V (VTH) invalidate the V1 supply, and unused pins must be connected to ground."
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{
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"name": "OV1",
"type": "input",
"description": "Channel 1 overvoltage comparator input; rising voltages above 1V (VTH) invalidate the V1 supply, and unused pins must be connected to ground."
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{
"number": "4",
"name": "UV2",
"type": "input",
"description": "Channel 2 undervoltage comparator input; falling voltages below 1V (VTH) invalidate the V2 supply, and unused pins must be connected to ground."
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{
"number": "5",
"name": "OV2",
"type": "input",
"description": "Channel 2 overvoltage comparator input; rising voltages above 1V (VTH) invalidate the V2 supply, and unused pins must be connected to ground."
},
{
"number": "6",
"name": "VALID1",
"type": "output",
"description": "40V-rated open-drain output that pulls low when V1 has been within its OV/UV window for at least the validation time, and must be left open when not used."
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{
"number": "7",
"name": "VALID2",
"type": "output",
"description": "40V-rated open-drain output that pulls low when V2 has been within its OV/UV window for at least the validation time, and must be left open when not used."
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{
"number": "8",
"name": "GND",
"type": "power_in",
"description": "Device ground."
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{
"number": "9",
"name": "CAS",
"type": "output",
"description": "Cascade output pulled up to INTVCC by a 20µA internal source, can be pulled up to as high as 5.5V independent of the input supplies, and must be left open if not used."
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{
"number": "10",
"name": "INTVCC",
"type": "power_out",
"description": "Internal low-voltage supply decoupling output; no external load current may be drawn from it, and a 0.1µF capacitor to GND is required."
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{
"number": "11",
"name": "G2",
"type": "output",
"description": "Channel 2 P-channel MOSFET gate drive output, clamped 6.2V (ΔVG) below VS2 when driven low."
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{
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"name": "VS2",
"type": "input",
"description": "Channel 2 common-source connection of the external P-channel MOSFETs used to monitor the gate drive reference; connect to ground when the channel is not used."
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"description": "Channel 1 P-channel MOSFET gate drive output, clamped 6.2V (ΔVG) below VS1 when driven low."
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{
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"type": "input",
"description": "Channel 1 common-source connection of the external P-channel MOSFETs used to monitor the gate drive reference; connect to ground when the channel is not used."
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{
"number": "15",
"name": "VOUT",
"type": "power_out",
"description": "Output voltage supply and sense pin that powers most internal circuitry above 2.475V and blocks any input from connecting unless VOUT is at least 125mV (VREV) below that input."
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{
"number": "16",
"name": "V2",
"type": "power_in",
"description": "Lower-priority input supply that connects to VOUT through its external P-channel MOSFETs only when V2 is valid and V1 is not; connect to ground when not used."
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{
"number": "17",
"name": "V1",
"type": "power_in",
"description": "Higher-priority input supply that connects to VOUT through its external P-channel MOSFETs when V1 is within its user-defined OV/UV window for the validation time."
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{
"number": "18",
"name": "EN",
"type": "input",
"description": "40V channel enable input; driving it below 1V (VEN(TH)) turns off both external MOSFETs, it is pulled to INTVCC by a 3.2µA source, and it must be connected to INTVCC when not used."
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{
"number": "19",
"name": "SHDN",
"type": "input",
"description": "40V shutdown input; driving it below VSHDN(TH) turns off all external MOSFETs and resets the validation timers, it is pulled to INTVCC by a 3.2µA source, and it must be connected to INTVCC when not used."
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{
"number": "20",
"name": "HYS",
"type": "input",
"description": "OV/UV comparator hysteresis input; grounding it selects fixed internal hysteresis, while a resistor to GND sets a 63mV/RHYS hysteresis current, and it must be connected to GND if not used."
},
{
"number": "21",
"name": "GND",
"type": "power_in",
"description": "Exposed pad is device ground and may be left open or connected to device ground."
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"name": "HYS voltage",
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{
"name": "INTVCC voltage (absolute maximum)",
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"min": -0.3,
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"max": 6.2,
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{
"name": "VALID1, VALID2 output voltage",
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{
"name": "CAS output voltage",
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"name": "Output currents",
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{
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{
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{
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"conditions": "SHDN = 0V",
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"conditions": "SHDN = 0V",
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{
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{
"name": "V1, V2 supply current (diode-OR'd)",
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{
"name": "V1, V2 supply current (second row)",
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"conditions": "VOUT = 0V, SHDN = 0V",
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{
"name": "V1, V2 supply current (third row)",
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{
"name": "VS supply current, channel on",
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{
"name": "VS supply current, channel off",
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{
"name": "Open clamp voltage (VS – VG)",
"symbol": "ΔVG",
"kind": "electrical",
"unit": "V",
"min": 5.4,
"typ": 6.2,
"max": 6.7,
"conditions": "VOUT = 11V, G1 = G2 = Open",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Sourcing clamp voltage (VS – VG)",
"symbol": "ΔVG(SOURCE)",
"kind": "electrical",
"unit": "V",
"min": 5.8,
"typ": 6.6,
"max": 7,
"conditions": "VOUT = 11V, I = –10µA",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Sinking clamp voltage (VS – VG)",
"symbol": "ΔVG(SINK)",
"kind": "electrical",
"unit": "V",
"min": 4.5,
"typ": 5.2,
"max": 6,
"conditions": "VOUT = 11V, I = 10µA",
"source_page": 3,
"source": "datasheet"
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{
"name": "Gate pull-down current",
"symbol": "IG(DN)",
"kind": "electrical",
"unit": "mA",
"min": 28,
"typ": 60,
"max": 120,
"conditions": "VG = 3V, VS Floating",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Gate off threshold (VS – VG)",
"symbol": "ΔVG(OFF)",
"kind": "electrical",
"unit": "V",
"min": 0.2,
"typ": 0.3,
"max": 0.4,
"conditions": "VS1 = VS2 = 2.8V, VOUT = 11V, Gate Rising",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Gate off resistance",
"symbol": "RG(OFF)",
"kind": "electrical",
"unit": "Ω",
"min": 8,
"typ": 16,
"max": 28,
"conditions": "V1 or V2 = 12V, IG = –10mA",
"source_page": 3,
"source": "datasheet"
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{
"name": "Reverse voltage threshold",
"symbol": "VREV",
"kind": "electrical",
"unit": "mV",
"min": 75,
"typ": 125,
"max": 185,
"conditions": "Measure (V1 or V2) – VOUT Falling",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Break-before-make time",
"symbol": "tG(SWITCHOVER)",
"kind": "timing",
"unit": "µs",
"min": 1,
"typ": 2.7,
"max": 4,
"conditions": "VOUT = 11V, CGATE = 10nF (Note 4)",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Gate turn-off delay from SHDN",
"symbol": "tP(SHDN)",
"kind": "timing",
"unit": "µs",
"min": 0.3,
"typ": 0.7,
"max": 1.4,
"conditions": "VOUT = 11V, Falling Edge SHDN to G1 = VS1–3V or G2 = VS2 – 3V, CGATE = 10nF",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Gate turn-on/off delay from EN",
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