component
RT7257BHZSP
Public Made by Adomby adom
Richtek Tech DC-DC Converters, SOIC-8-EP. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
main
Ray
symbol: bind pad 4, 9 (GND), which had no pin. The footprint carries the pad and page.json described it as "4,9", but n…
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{
"schema": "adom.pads/1",
"slug": "rt7257bhzsp",
"footprint": "SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm",
"generated_from": {
"footprint": "SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm@sha256:a7971720bdda0353",
"pins": "page.json:component.pins",
"overrides": null
},
"pin1": {
"pad": "1",
"at": [
-2.475,
-1.905
],
"corner": "top-left",
"source": "silk-marker",
"derived_from": "SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm@sha256:a7971720bdda0353"
},
"pad_count": 9,
"symbol_pins": [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8",
"9"
],
"paste_apertures": 4,
"issues": [],
"pads": [
{
"pad": "1",
"kind": "smd",
"shape": "roundrect",
"at": [
-2.475,
-1.905
],
"rot": 0.0,
"size": [
1.95,
0.6
],
"layers": [
"F.Cu",
"F.Mask",
"F.Paste"
],
"thermal": false,
"pin": "1",
"name": "BOOT",
"type": "power_in",
"description": "Bootstrap for high-side gate driver. Connect a 0.1μF or greater ceramic capacitor from BOOT to SW. V(BOOT)-V(SW) absolute max 6V.",
"is_pin1": true,
"source": {
"geometry": "SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm.kicad_mod",
"meaning": "page.json:component.pins",
"correspondence": "kicad: symbol pin number == pad name"
}
},
{
"pad": "2",
"kind": "smd",
"shape": "roundrect",
"at": [
-2.475,
-0.635
],
"rot": 0.0,
"size": [
1.95,
0.6
],
"layers": [
"F.Cu",
"F.Mask",
"F.Paste"
],
"thermal": false,
"pin": "2",
"name": "VIN",
"type": "power_in",
"description": "Input supply voltage, 4.5V to 18V (abs max 20V). Must be bypassed with a suitable large ceramic capacitor (e.g. 10μF x2 + 0.1μF).",
"is_pin1": false,
"source": {
"geometry": "SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm.kicad_mod",
"meaning": "page.json:component.pins",
"correspondence": "kicad: symbol pin number == pad name"
}
},
{
"pad": "3",
"kind": "smd",
"shape": "roundrect",
"at": [
-2.475,
0.635
],
"rot": 0.0,
"size": [
1.95,
0.6
],
"layers": [
"F.Cu",
"F.Mask",
"F.Paste"
],
"thermal": false,
"pin": "3",
"name": "SW",
"type": "power_out",
"description": "Switch node. Connect to an external L-C output filter. Swings between GND and VIN at up to 1.2MHz. High-side RDS(on) 110mΩ, low-side 90mΩ.",
"is_pin1": false,
"source": {
"geometry": "SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm.kicad_mod",
"meaning": "page.json:component.pins",
"correspondence": "kicad: symbol pin number == pad name"
}
},
{
"pad": "4",
"kind": "smd",
"shape": "roundrect",
"at": [
-2.475,
1.905
],
"rot": 0.0,
"size": [
1.95,
0.6
],
"layers": [
"F.Cu",
"F.Mask",
"F.Paste"
],
"thermal": false,
"pin": "4",
"name": "GND",
"type": "power_in",
"description": "Ground. Pin 4 and the exposed pad (pin 9) must both be soldered to a large PCB copper area connected to GND for maximum power dissipation (θJA 75°C/W with exposed pad).",
"is_pin1": false,
"source": {
"geometry": "SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm.kicad_mod",
"meaning": "page.json:component.pins",
"correspondence": "kicad: symbol pin number == pad name"
}
},
{
"pad": "5",
"kind": "smd",
"shape": "roundrect",
"at": [
2.475,
1.905
],
"rot": 0.0,
"size": [
1.95,
0.6
],
"layers": [
"F.Cu",
"F.Mask",
"F.Paste"
],
"thermal": false,
"pin": "5",
"name": "FB",
"type": "input",
"description": "Feedback input. Regulates the output via an external resistive voltage divider. Internal reference VREF = 0.8V (±1.5%).",
"is_pin1": false,
"source": {
"geometry": "SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm.kicad_mod",
"meaning": "page.json:component.pins",
"correspondence": "kicad: symbol pin number == pad name"
}
},
{
"pad": "6",
"kind": "smd",
"shape": "roundrect",
"at": [
2.475,
0.635
],
"rot": 0.0,
"size": [
1.95,
0.6
],
"layers": [
"F.Cu",
"F.Mask",
"F.Paste"
],
"thermal": false,
"pin": "6",
"name": "COMP",
"type": "output",
"description": "Compensation node for the regulation control loop. Connect a series R-C network from COMP to GND; an optional additional capacitor from COMP to GND may be required in some cases.",
"is_pin1": false,
"source": {
"geometry": "SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm.kicad_mod",
"meaning": "page.json:component.pins",
"correspondence": "kicad: symbol pin number == pad name"
}
},
{
"pad": "7",
"kind": "smd",
"shape": "roundrect",
"at": [
2.475,
-0.635
],
"rot": 0.0,
"size": [
1.95,
0.6
],
"layers": [
"F.Cu",
"F.Mask",
"F.Paste"
],
"thermal": false,
"pin": "7",
"name": "EN",
"type": "input",
"description": "Enable input. Logic high (VIH ≥ 2.7V) enables the converter; logic low (VIL ≤ 0.4V) puts the device into shutdown (<3μA supply). Tie to VIN via a 100kΩ pull-up for automatic startup. Absolute max 20V.",
"is_pin1": false,
"source": {
"geometry": "SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm.kicad_mod",
"meaning": "page.json:component.pins",
"correspondence": "kicad: symbol pin number == pad name"
}
},
{
"pad": "8",
"kind": "smd",
"shape": "roundrect",
"at": [
2.475,
-1.905
],
"rot": 0.0,
"size": [
1.95,
0.6
],
"layers": [
"F.Cu",
"F.Mask",
"F.Paste"
],
"thermal": false,
"pin": "8",
"name": "SS",
"type": "input",
"description": "Soft-start control input. Connect a capacitor from SS to GND to set the soft-start period; a 0.1μF cap gives ~13.5ms (ISS = 6μA typ).",
"is_pin1": false,
"source": {
"geometry": "SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm.kicad_mod",
"meaning": "page.json:component.pins",
"correspondence": "kicad: symbol pin number == pad name"
}
},
{
"pad": "9",
"kind": "smd",
"shape": "rect",
"at": [
0.0,
0.0
],
"rot": 0.0,
"size": [
2.29,
3.0
],
"layers": [],
"thermal": true,
"pin": "9",
"name": "GND",
"type": "power_in",
"description": "Ground. Pin 4 and the exposed pad (pin 9) must both be soldered to a large PCB copper area connected to GND for maximum power dissipation (θJA 75°C/W with exposed pad).",
"is_pin1": false,
"source": {
"geometry": "SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm.kicad_mod",
"meaning": "page.json:component.pins",
"correspondence": "kicad: symbol pin number == pad name"
}
}
]
}