component
LTC2952IUF#PBF
Public Made by Adomby adom
Analog Devices Monitors & Reset Circuits, QFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"package": "QFN-20-EP(4x4)",
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"category": "Power Management ICs",
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"name": "VM",
"type": "input",
"description": "Voltage monitor input to an accurate comparator with a 0.5V threshold that, together with WDE, controls the RST output; tie to GND if unused."
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{
"number": "2",
"name": "PFI",
"type": "input",
"description": "Power fail input to a high-impedance comparator with 0.5V falling threshold and 15mV hysteresis that controls PFO; tie to GND if unused."
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{
"number": "3",
"name": "WDE",
"type": "input",
"description": "Three-state watchdog/extend input; an edge is needed within the 1.6s watchdog timeout, and an edge within the 400ms tKILL,OFF WAIT period extends the shutdown wait by another 400ms."
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{
"number": "4",
"name": "PB",
"type": "input",
"description": "Pushbutton input to a comparator with 0.775V falling threshold and 25mV hysteresis, with a 10μA internal pull-up to 4V, controlling on/off via EN; leave open if unused."
},
{
"number": "5",
"name": "RST",
"type": "output",
"description": "Open-drain reset output that pulls low when VM is below 0.5V and stays low 200ms after VM rises above 0.5V or after a 1.6s watchdog timeout."
},
{
"number": "6",
"name": "PFO",
"type": "output",
"description": "Open-drain power fail output that pulls low when PFI is below 0.5V; leave open or tie to GND if unused."
},
{
"number": "7",
"name": "ONT",
"type": "input",
"description": "On timing input; attach 110pF to GND per additional millisecond of turn-on debounce beyond the internal 26ms, or leave open."
},
{
"number": "8",
"name": "OFFT",
"type": "input",
"description": "Off timing input; attach 110pF to GND per additional millisecond of turn-off debounce beyond the internal 26ms, or leave open."
},
{
"number": "9",
"name": "GND",
"type": "power_in",
"description": "Device ground."
},
{
"number": "10",
"name": "INT",
"type": "output",
"description": "Open-drain interrupt output that asserts low 26ms after the initial falling edge of a pushbutton off event and during power-down; leave open or tie to GND if unused."
},
{
"number": "11",
"name": "EN",
"type": "output",
"description": "High-voltage open-drain pull-down DC/DC enable output that goes high impedance on a valid turn-on and pulls low at the end of a valid power-down or when KILL is driven low."
},
{
"number": "12",
"name": "G2",
"type": "output",
"description": "Secondary P-channel MOSFET gate drive output that regulates a 20mV forward voltage (VFR) between V2 and VS; leave open if unused."
},
{
"number": "13",
"name": "V2",
"type": "power_in",
"description": "Secondary input supply voltage of 2.7V to 28V and anode input of the secondary ideal diode driver; optional 0.1μF to 10μF bypass capacitor."
},
{
"number": "14",
"name": "VS",
"type": "power_in",
"description": "Power sense input supplying internal circuitry and the cathode input to the ideal diode drivers; bypass to ground with at least 0.1μF."
},
{
"number": "15",
"name": "V1",
"type": "power_in",
"description": "Primary input supply voltage of 2.7V to 28V and anode input of the primary ideal diode driver; optional 0.1μF to 10μF bypass capacitor."
},
{
"number": "16",
"name": "G1",
"type": "output",
"description": "Primary P-channel MOSFET gate drive output that regulates a 20mV forward voltage (VFR) between V1 and VS; leave open if unused."
},
{
"number": "17",
"name": "G1STAT",
"type": "output",
"description": "Open-drain primary ideal diode status output that goes from open to a strong pull-down when the primary P-channel switch is off; leave open or tie to GND if unused."
},
{
"number": "18",
"name": "M2",
"type": "input",
"description": "High-impedance mode select input 2 with 0.5V falling threshold and 15mV hysteresis; enables the G1 ideal diode when M1 is low, or acts as a digital on/off input when M1 is high."
},
{
"number": "19",
"name": "M1",
"type": "input",
"description": "Mode select input 1 with 0.5V falling threshold, 15mV hysteresis and a 3μA internal pull-up to 4V that, with M2, sets PowerPath and on/off behavior."
},
{
"number": "20",
"name": "KILL",
"type": "input",
"description": "System power shutdown input with an accurate 0.5V falling threshold; low asserts EN low, and it is ignored for 400ms (tKILL,ON BLANK) after EN first goes high impedance."
},
{
"number": "21",
"name": "EP",
"type": "passive",
"description": "Exposed pad (pin 21) that may be left open or connected to device ground."
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"name": "Operating Supply Voltage",
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"name": "Quiescent Supply Current at V2, both ideal diodes off",
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"name": "Quiescent Supply Current, both ideal diodes on",
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{
"name": "V2 Preferential Threshold Voltage",
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"kind": "electrical",
"unit": "V",
"min": 3.3,
"typ": null,
"max": 3.8,
"conditions": "V1 = 28V, VS = Open",
"source_page": 3,
"source": "datasheet"
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{
"name": "Inter Pin Leakage to Highest Supply",
"symbol": "ILEAK",
"kind": "electrical",
"unit": "μA",
"min": -3,
"typ": null,
"max": 3,
"conditions": "V1 = 28V, V2 = VS = 0V; V1 = VS = 0V, V2 = 28V; V1 = V2 = 0V, VS = 28V",
"source_page": 3,
"source": "datasheet"
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{
"name": "Ideal Diode Forward Regulation Voltage",
"symbol": "VFR",
"kind": "electrical",
"unit": "mV",
"min": 10,
"typ": 20,
"max": 35,
"conditions": "(V1 or V2) – VS, 2.7V ≤ (V1 or V2) ≤ 28V",
"source_page": 3,
"source": "datasheet"
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{
"name": "Fast Reverse Turn-Off Threshold Voltage",
"symbol": "VRTO",
"kind": "electrical",
"unit": "mV",
"min": -64,
"typ": -35,
"max": -20,
"conditions": "(V1 or V2) – VS, ∆IG ≤ –100μA/mV",
"source_page": 3,
"source": "datasheet"
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{
"name": "Gate Turn-Off Current",
"symbol": "IG(SRC)",
"kind": "electrical",
"unit": "μA",
"min": -10,
"typ": -5,
"max": -2,
"conditions": "G1 = G2 = VMAX – 1.5V",
"source_page": 3,
"source": "datasheet"
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{
"name": "Gate Turn-On Current",
"symbol": "IG(SNK)",
"kind": "electrical",
"unit": "μA",
"min": 2,
"typ": 5,
"max": 10,
"conditions": "VS = (V1 or V2) – 40mV, G1 = G2 = VMAX –1.5V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Gate Fast Turn-Off Source Current",
"symbol": "IG(FASTSRC)",
"kind": "electrical",
"unit": "mA",
"min": -10,
"typ": -2.5,
"max": -0.5,
"conditions": "VS = (V1 or V2) + 0.1V, G1 = G2 = VMAX –1.5V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Gate Fast Turn-On Sink Current",
"symbol": "IG(FASTSNK)",
"kind": "electrical",
"unit": "mA",
"min": 0.3,
"typ": 0.7,
"max": 2,
"conditions": "V1 = V2 = 5V to 28V, VS = (V1 or V2) – 0.1V, G1 = G2 = VMAX – 1.5V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Gate Off Voltage",
"symbol": "VG(OFF)",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": 0.2,
"max": 0.4,
"conditions": "IGX = -2μA, VX = 2.7V to 28V, VS = VX + 0.1V, Measure VMAX – VGX",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Gate Turn-On Time",
"symbol": "tG(ON)",
"kind": "timing",
"unit": "μs",
"min": 0.1,
"typ": 2.5,
"max": 10,
"conditions": "VG(OFF) to VGS ≤ –3V, CGATE = 1nF, V1 = V2 = 12V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Gate Turn-Off Time",
"symbol": "tG(OFF)",
"kind": "timing",
"unit": "μs",
"min": 0.1,
"typ": 2.5,
"max": 10,
"conditions": "VG(ON) to VGS ≥ –1.5V, CGATE = 1nF, V1 = V2 = 12V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "PB Input Current",
"symbol": "IPB",
"kind": "electrical",
"unit": "μA",
"min": -25,
"typ": -10,
"max": -1,
"conditions": "VPB(VOC) < VPB ≤ 28V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "PB Input Current",
"symbol": "IPB",
"kind": "electrical",
"unit": "μA",
"min": -1,
"typ": null,
"max": 1,
"conditions": "0V ≤ VPB < VPB(VOC)",
"source_page": 3,
"source": "datasheet"
},
{
"name": "PB Input Threshold Voltage",
"symbol": "VTH_PB",
"kind": "electrical",
"unit": "V",
"min": 0.65,
"typ": 0.77,
"max": 0.8,
"conditions": "PB Falling From High to Low",
"source_page": 3,
"source": "datasheet"
},
{
"name": "PB Input Hysteresis",
"symbol": "VHYS_PB",
"kind": "electrical",
"unit": "mV",
"min": 10,
"typ": 25,
"max": 150,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "ONT/OFFT Pull-Up/Pull-Down Current",
"symbol": "IONT,OFFT",
"kind": "electrical",
"unit": "μA",
"min": 1.6,
"typ": 2,
"max": 2.4,
"conditions": "VONT, VOFFT = 0V (Pull-Up), 1.5V (Pull-Down); magnitude, ±",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Internal Default On-Time/Off-Time",
"symbol": "tDB,ON/OFF",
"kind": "timing",
"unit": "ms",
"min": 18,
"typ": 26,
"max": 34,
"conditions": "CONT = Open",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Additional Adjustable Turn-On/Turn-Off Time",
"symbol": "tONT,OFFT",
"kind": "timing",
"unit": "ms",
"min": 10,
"typ": 15,
"max": 20,
"conditions": "CONT = 1500pF, COFFT = 1500pF",
"source_page": 4,
"source": "datasheet"
},
{
"name": "VM Input Reset Threshold",
"symbol": "VTH_VM",
"kind": "electrical",
"unit": "V",
"min": 0.492,
"typ": 0.5,
"max": 0.508,
"conditions": "Both Falling and Rising",
"source_page": 4,
"source": "datasheet"
},
{
"name": "PFI, M1, M2, KILL Input Threshold Voltage",
"symbol": "VTH",
"kind": "electrical",
"unit": "V",
"min": 0.492,
"typ": 0.5,
"max": 0.508,
"conditions": "Falling",
"source_page": 4,
"source": "datasheet"
},
{
"name": "PFI, M1, M2, KILL Input Hysteresis",
"symbol": "VHYS",
"kind": "electrical",
"unit": "mV",
"min": 5,
"typ": 15,
"max": 25,
"conditions": "",
"source_page": 4,
"source": "datasheet"
},
{
"name": "VM, PFI, M2, KILL Input Current",
"symbol": "IIN_LKG",
"kind": "electrical",
"unit": "μA",
"min": -0.1,
"typ": null,
"max": 0.1,
"conditions": "V = 0.5V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "M1 Input Pull-Up Current",
"symbol": "IM1_SRC",
"kind": "electrical",
"unit": "μA",
"min": -5,
"typ": -3,
"max": -1.5,
"conditions": "M1 = 1V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "M1 Input Leak Current",
"symbol": "IM1_LKG",
"kind": "electrical",
"unit": "μA",
"min": -0.1,
"typ": null,
"max": 0.1,
"conditions": "M1 = 6V",
"source_page": 4,
"source": "datasheet"
},
{
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