component
RT7257BHZSP
Public Made by Adomby adom
Richtek Tech DC-DC Converters, SOIC-8-EP. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
← Commit history
symbol: bind pad 4, 9 (GND), which had no pin. The footprint carries the pad and page.json described it as "4,9", but no symbol pin resolved to it - so KiCad emitted no connection and the pad was inert copper in Fusion. On this part that pad is the thermal path. Name and type taken from the page's own entry; the entry is renumbered to the pad the footprint actually has, so page, symbol and footprint agree.
4 files changed
+48−48
pads.json+12−31@@ -22,34 +22,15 @@ "1", "2", "3",+ "4", "5", "6", "7",- "8"+ "8",+ "9" ], "paste_apertures": 4,- "issues": [- {- "kind": "pin-not-in-symbol",- "pin": "4,9",- "name": "GND",- "detail": "page.json describes pin \"4,9\" (GND) from the datasheet, but the symbol has no such pin, so nothing can connect to it"- },- {- "kind": "pad-has-no-pin",- "pad": "4",- "thermal": false,- "described_in_page": false,- "detail": "footprint pad \"4\" is in copper but the SYMBOL has no pin for it"- },- {- "kind": "pad-has-no-pin",- "pad": "9",- "thermal": true,- "described_in_page": false,- "detail": "footprint pad \"9\" is in copper but the SYMBOL has no pin for it - a thermal pad with no net will float"- }- ],+ "issues": [], "pads": [ { "pad": "1",@@ -161,13 +142,13 @@ ], "thermal": false, "pin": "4",- "name": null,- "type": null,- "description": null,+ "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": null,+ "meaning": "page.json:component.pins", "correspondence": "kicad: symbol pin number == pad name" } },@@ -307,13 +288,13 @@ "layers": [], "thermal": true, "pin": "9",- "name": null,- "type": null,- "description": null,+ "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": null,+ "meaning": "page.json:component.pins", "correspondence": "kicad: symbol pin number == pad name" } }
page.json+8−2@@ -15,7 +15,7 @@ "mpn": "RT7257BHZSP", "manufacturer": "Richtek Tech", "package": "SOIC-8-EP",- "pin_count": 8,+ "pin_count": 9, "category": "PMIC", "subcategory": "DC-DC Converters", "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/0b2ba4344836454fa596c261592116a7.pdf",@@ -49,7 +49,7 @@ "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) 110m\u03a9, low-side 90m\u03a9." }, {- "number": "4,9",+ "number": "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 (\u03b8JA 75\u00b0C/W with exposed pad)."@@ -77,6 +77,12 @@ "name": "SS", "type": "input", "description": "Soft-start control input. Connect a capacitor from SS to GND to set the soft-start period; a 0.1\u03bcF cap gives ~13.5ms (ISS = 6\u03bcA typ)."+ },+ {+ "number": "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 (\u03b8JA 75\u00b0C/W with exposed pad)." } ], "provenance": {
rt7257bhzsp.kicad_sym+8@@ -36,6 +36,14 @@ (name "COMP" (effects (font (size 1.27 1.27)))) (number "6" (effects (font (size 1.27 1.27)))) )+ (pin power_in line (at -17.78 -7.62 0) (length 5.08)+ (name "GND" (effects (font (size 1.27 1.27))))+ (number "4" (effects (font (size 1.27 1.27))))+ )+ (pin power_in line (at -17.78 -10.16 0) (length 5.08)+ (name "GND" (effects (font (size 1.27 1.27))))+ (number "9" (effects (font (size 1.27 1.27))))+ ) ) ) )
rt7257bhzsp.lbr+20−15@@ -50,18 +50,18 @@ <layer number="98" name="Guide" color="6" fill="1" visible="yes" active="yes"/> </layers> <library>-<description></description>+<description>Richtek Tech DC-DC Converters, SOIC-8-EP</description> <packages>-<package name="RT7257BHZSP">- <description>RT7257BHZSP</description>- <smd name="1" x="-2.4750" y="1.9050" dx="1.9500" dy="0.6000" layer="1"/>- <smd name="2" x="-2.4750" y="0.6350" dx="1.9500" dy="0.6000" layer="1"/>- <smd name="3" x="-2.4750" y="-0.6350" dx="1.9500" dy="0.6000" layer="1"/>- <smd name="4" x="-2.4750" y="-1.9050" dx="1.9500" dy="0.6000" layer="1"/>- <smd name="5" x="2.4750" y="-1.9050" dx="1.9500" dy="0.6000" layer="1"/>- <smd name="6" x="2.4750" y="-0.6350" dx="1.9500" dy="0.6000" layer="1"/>- <smd name="7" x="2.4750" y="0.6350" dx="1.9500" dy="0.6000" layer="1"/>- <smd name="8" x="2.4750" y="1.9050" dx="1.9500" dy="0.6000" layer="1"/>+<package name="SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm">+ <description>SOIC-8-1EP, 3.9 x 4.9 mm, 1.27 mm pitch</description>+ <smd name="1" x="-2.4750" y="1.9050" dx="1.9500" dy="0.6000" layer="1" roundness="50"/>+ <smd name="2" x="-2.4750" y="0.6350" dx="1.9500" dy="0.6000" layer="1" roundness="50"/>+ <smd name="3" x="-2.4750" y="-0.6350" dx="1.9500" dy="0.6000" layer="1" roundness="50"/>+ <smd name="4" x="-2.4750" y="-1.9050" dx="1.9500" dy="0.6000" layer="1" roundness="50"/>+ <smd name="5" x="2.4750" y="-1.9050" dx="1.9500" dy="0.6000" layer="1" roundness="50"/>+ <smd name="6" x="2.4750" y="-0.6350" dx="1.9500" dy="0.6000" layer="1" roundness="50"/>+ <smd name="7" x="2.4750" y="0.6350" dx="1.9500" dy="0.6000" layer="1" roundness="50"/>+ <smd name="8" x="2.4750" y="1.9050" dx="1.9500" dy="0.6000" layer="1" roundness="50"/> <smd name="9" x="0.0000" y="-0.0000" dx="2.2900" dy="3.0000" layer="1"/> <polygon width="0.1200" layer="21"> <vertex x="-2.6000" y="2.4700"/>@@ -87,12 +87,13 @@ </packages> <symbols> <symbol name="RT7257BHZSP">+ <description>Richtek Tech DC-DC Converters, SOIC-8-EP</description> <wire x1="-12.7" y1="5.08" x2="12.7" y2="5.08" width="0.254" layer="94"/> <wire x1="12.7" y1="5.08" x2="12.7" y2="-7.62" width="0.254" layer="94"/> <wire x1="12.7" y1="-7.62" x2="-12.7" y2="-7.62" width="0.254" layer="94"/> <wire x1="-12.7" y1="-7.62" x2="-12.7" y2="5.08" width="0.254" layer="94"/>- <text x="0" y="7.62" size="1.27" layer="95" align="bottom-center">>NAME</text>- <text x="0" y="-10.16" size="1.27" layer="96" align="top-center">>VALUE</text>+ <text x="0.0000" y="7.6200" size="1.27" layer="95" align="center">>NAME</text>+ <text x="0.0000" y="-10.1600" size="1.27" layer="96" align="center">>VALUE</text> <pin name="BOOT" x="-17.78" y="2.54" length="middle" direction="pwr"/> <pin name="VIN" x="-17.78" y="0" length="middle" direction="pwr"/> <pin name="SW" x="-17.78" y="-2.54" length="middle" direction="out"/>@@ -100,16 +101,18 @@ <pin name="SS" x="17.78" y="2.54" length="middle" direction="in" rot="R180"/> <pin name="EN" x="17.78" y="0" length="middle" direction="in" rot="R180"/> <pin name="COMP" x="17.78" y="-2.54" length="middle" direction="out" rot="R180"/>+ <pin name="GND" x="-17.78" y="-7.62" length="middle" direction="pwr"/>+ <pin name="GND@2" x="-17.78" y="-10.16" length="middle" direction="pwr"/> </symbol> </symbols> <devicesets> <deviceset name="RT7257BHZSP" prefix="U">- <description></description>+ <description>Richtek Tech DC-DC Converters, SOIC-8-EP</description> <gates> <gate name="G$1" symbol="RT7257BHZSP" x="0" y="0"/> </gates> <devices>- <device name="" package="RT7257BHZSP">+ <device name="" package="SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm"> <connects> <connect gate="G$1" pin="BOOT" pad="1"/> <connect gate="G$1" pin="VIN" pad="2"/>@@ -118,6 +121,8 @@ <connect gate="G$1" pin="SS" pad="8"/> <connect gate="G$1" pin="EN" pad="7"/> <connect gate="G$1" pin="COMP" pad="6"/>+ <connect gate="G$1" pin="GND" pad="4"/>+ <connect gate="G$1" pin="GND@2" pad="9"/> </connects> <technologies> <technology name="">