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RT9505GQW
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Richtek Tech Battery Management, WDFN-10-EP(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+90@@ -0,0 +1,90 @@+# RT9505GQW++**Richtek Tech** · Battery Management · WDFN-10-EP(3x3)++RT9505GQW from Richtek Tech, in a WDFN-10-EP(3x3). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | ACIN | power_in | Wall adaptor charge input supply; the ACIN input is rated -0.3V to 18V absolute maximum and recommended at 4.5V to 6V. |+| 2 | NC | unconnected | No internal connection. |+| 3 | CHG_S | output | Open-drain charge status indicator output that is ON (pulled low) during ACIN charge and OFF when charge is done. |+| 4 | PGOOD | output | Open-drain power good indicator output that the status table shows as ON during both ACIN charge and charge done. |+| 5 | GND | power_in | Ground. |+| 6 | ISETA | input | Wall adaptor charge current set point; a resistor from ISETA to GND (KSET = 300, VSET = 2.5V) sets the ACIN fast-charge current from 100mA to 1.2A. |+| 7 | NC | unconnected | No internal connection. |+| 8 | EN | input | Active-low charge enable input with logic-high threshold of at least 1.5V, logic-low maximum of 0.4V, and absolute maximum of 6V. |+| 9 | TS | input | Battery temperature sense input; charging is turned off when VTS is at or above 2.5V or at or below 0.5V, with a 96uA to 108uA source current. |+| 10 | BATT | power_out | Battery charge current output that regulates the battery voltage at VREG of 4.158V to 4.242V (4.2V nominal) at 60mA test current. |+| 11 | GND | power_in | Exposed pad must be soldered to the PCB and connected to GND for heat sinking and ground. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Richtek Tech |+| Package | WDFN-10-EP(3x3) |+| Category | Power Management (PMIC) |+| Pins | 11 |++## Electrical characteristics++Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).++| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |+|---|---|---|---|---|---|---|---|+| ACIN UVP Rising Threshold Voltage | VUV_HIGH | | 4.4 | 4.5 | V | | 5 |+| ACIN UVP Hysteresis | VUV_LOW | 50 | 80 | 120 | mV | | 5 |+| ACIN Standby Current | ISTBY | | 300 | 500 | uA | VBATT = 4.5V | 5 |+| ACIN Shutdown Current | ISHDN | | 50 | 100 | uA | VEN = HIGH | 5 |+| ACIN UVP Current | IUVP | | 150 | 250 | uA | VACIN = 4V, VUSB = 4V, VBATT = 3V | 5 |+| BATT Sleep Leakage Current | ISLEEP | | 2 | 5 | uA | VACIN = 4V, VUSB = 4V, VBATT = 4.5V | 5 |+| BATT Regulation Voltage | VREG | 4.158 | 4.2 | 4.242 | V | IBATT = 60mA | 5 |+| Regulation Voltage Accuracy | | -1 | | 1 | % | | 5 |+| ACIN MOSFET RDS(ON) | RDS(ON)_ACIN | | 600 | | mΩ | IBATT = 500mA | 5 |+| ISETA Set Voltage (Fast Charge Phase) | VISETA | 2.45 | 2.5 | 2.55 | V | VBATT = 3.5V | 5 |+| Full Charge Setting Range | ICHG_AC | 100 | | 1200 | mA | | 5 |+| BATT Pre-Charge Rising Threshold | VPRECH | 2.6 | 2.8 | 3 | V | | 6 |+| BATT Pre-Charge Threshold Hysteresis | ΔVPRECH | 50 | 100 | 200 | mV | | 6 |+| Pre-Charge Current | IPCHG | 8 | 10 | 12 | % | VBATT = 2V | 6 |+| BATT Re-Charge Falling Threshold Hysteresis | ΔVRECH_L | 60 | 100 | 150 | mV | VREG − VBATT | 6 |+| ISETA Charge Termination Set Voltage | VTERM | 225 | 250 | 275 | mV | VBATT = 4.2V | 6 |+| Logic-High Voltage (EN Threshold) | VIH | 1.5 | | | V | | 6 |+| Logic-Low Voltage (EN Threshold) | VIL | | | 0.4 | V | | 6 |+| EN Pin Input Current | IEN | | | 2 | uA | VEN = 2V | 6 |+| TS Pin Source Current | ITS | 96 | 102 | 108 | uA | VTS = 1.5V | 6 |+| TS Pin Low Voltage Threshold | VTS_LOW | 0.485 | 0.5 | 0.515 | V | Falling | 6 |+| TS Pin High Voltage Threshold | VTS_HIGH | 2.45 | 2.5 | 2.55 | V | Rising | 6 |+| ACIN Input Voltage Range | | 4.5 | | 6 | V | | 5 |+| Junction Temperature Range | TJ | -40 | | 125 | °C | | 5 |+| Ambient Temperature Range | TA | -40 | | 85 | °C | | 5 |+| ACIN Input Voltage | | -0.3 | | 18 | V | | 5 |+| EN Input Voltage | | -0.3 | | 6 | V | | 5 |+| Output Current | | | | 1.2 | A | | 5 |+| Power Dissipation (WDFN-10L 3x3) | PD | | | 0.926 | W | TA = 25°C | 5 |+| Lead Temperature (Soldering, 10 sec.) | | | | 260 | °C | Soldering, 10 sec | 5 |+| Junction Temperature | TJ | | | 150 | °C | | 5 |+| Storage Temperature Range | TSTG | -65 | | 150 | °C | | 5 |+| ESD Susceptibility HBM | | | | 2 | kV | Human Body Model (Note 3) | 5 |+| ESD Susceptibility MM | | | | 200 | V | Machine Model (Note 3) | 5 |+| Package Thermal Resistance, Junction-to-Ambient (WDFN-10L 3x3) | θJA | | | 108 | °C/W | Note 2, JEDEC 51-7 4-layer board | 5 |+| Package Thermal Resistance, Junction-to-Case (WDFN-10L 3x3) | θJC | | | 8.2 | °C/W | Case point on exposed pad (Note 2) | 5 |++## CAD (KiCad official)++- Symbol: `RT9505GQW`+- Footprint: `Package_DFN_QFN:WDFN-10-1EP_3x3mm_P0.5mm_EP1.8x2.5mm`+- 3D model: WDFN-10-EP(3x3), generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.75 mm nominal WSON height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)+- 3D model files: `rt9505gqw-etched.step` / `rt9505gqw-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rt9505gqw.step` / `rt9505gqw.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Richtek Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590233612088860672) (11 pp, sha256 `650fd77c66339b8d`, retrieved 2026-10-18, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/rt9505gqw-datasheet.pdf)
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docs/rt9505gqw-datasheet.pdfadded+1671@@ -0,0 +1,1671 @@+%PDF-1.4+%����+1 0 obj+<</CreationDate(D:20111219164709+08'00')/Author()/Creator(PageMaker 7.0)/Producer(Acrobat Distiller 7.0 \(Windows\); modified using iText� 5.5.11 �2000-2017 iText Group NV \(AGPL-version\))/ModDate(D:20181004163422+08'00')/Title(Linear Single Cell Li-Ion Battery Charger IC)/Keywords(Digital Cameras,Digital Cameras,Cellular Phones,Personal Data Assistants \(PDAs\),MP3 Players,Hand Held PCs,18V Maximum Rating for AC Adapter,18V Maximum Rating for AC Adapter,Internal Integrate P-MOSFETs,AC Adapter Power Good Status Indicator,Charge Status Indicator,Under Voltage Protection,Over Voltage Protection,Automatic Recharge Feature,Battery Temperature Monitoring,Small 10-Lead WDFN Package,Thermal Feedback Optimizing Charge Rate,RoHS Compliant and 100% Lead \(Pb\)-Free)/Subject(The RT9505 is a fully integrated low cost single-cell Li-Ion battery charger IC ,ideal for portable applications. The RT9505 is capable of being powered up from ,AC adapter. The RT9505 enters sleep mode when AC adapter is removed.,The RT9505 optimizes the charging task by using a control algorithm including ,preconditioning mode, fast charge mode and constant voltage mode. The charging ,task is terminated as the charge current drops below the preset threshold. The ,AC adapter charge current can be programmed up to 1A with an external resister. ,The internal thermal feedback circuitry regulates the die temperature to ,optimize the charge rate for all ambient temperatures.,The RT9505 features 18V maximum rating voltages for AC adapter. The other ,features are under voltage protection, over voltage protection for AC adapter ,supply and battery temperature monitoring.)>>+endobj+2 0 obj+<</Length 5607/Type/Metadata/Subtype/XML>>stream+<?xpacket begin="" id="W5M0MpCehiHzreSzNTczkc9d"?>+<x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="Adobe XMP Core 5.1.0-jc003">+ <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">+ <rdf:Description rdf:about=""+ xmlns:dc="http://purl.org/dc/elements/1.1/"+ xmlns:pdf="http://ns.adobe.com/pdf/1.3/"+ xmlns:xmp="http://ns.adobe.com/xap/1.0/"+ dc:format="application/pdf"+ pdf:Keywords="Digital Cameras,Digital Cameras,Cellular Phones,Personal Data Assistants (PDAs),MP3 Players,Hand Held PCs,18V Maximum Rating for AC Adapter,18V Maximum Rating for AC Adapter,Internal Integrate P-MOSFETs,AC Adapter Power Good Status Indicator,Charge Status Indicator,Under Voltage Protection,Over Voltage Protection,Automatic Recharge Feature,Battery Temperature Monitoring,Small 10-Lead WDFN Package,Thermal Feedback Optimizing Charge Rate,RoHS Compliant and 100% Lead (Pb)-Free"+ pdf:Producer="Acrobat Distiller 7.0 (Windows); modified using iText® 5.5.11 ©2000-2017 iText Group NV (AGPL-version)"+ xmp:CreateDate="2011-12-19T16:47:09+08:00"+ xmp:CreatorTool="PageMaker 7.0"+ xmp:ModifyDate="2018-10-04T16:34:22+08:00"+ xmp:MetadataDate="2018-10-04T16:34:22+08:00">+ <dc:subject>+ <rdf:Bag>+ <rdf:li>Digital Cameras</rdf:li>+ <rdf:li>Digital Cameras</rdf:li>+ <rdf:li>Cellular Phones</rdf:li>+ <rdf:li>Personal Data Assistants (PDAs)</rdf:li>+ <rdf:li>MP3 Players</rdf:li>+ <rdf:li>Hand Held PCs</rdf:li>+ <rdf:li>18V Maximum Rating for AC Adapter</rdf:li>+ <rdf:li>18V Maximum Rating for AC Adapter</rdf:li>+ <rdf:li>Internal Integrate P-MOSFETs</rdf:li>+ <rdf:li>AC Adapter Power Good Status Indicator</rdf:li>+ <rdf:li>Charge Status Indicator</rdf:li>+ <rdf:li>Under Voltage Protection</rdf:li>+ <rdf:li>Over Voltage Protection</rdf:li>+ <rdf:li>Automatic Recharge Feature</rdf:li>+ <rdf:li>Battery Temperature Monitoring</rdf:li>+ <rdf:li>Small 10-Lead WDFN Package</rdf:li>+ <rdf:li>Thermal Feedback Optimizing Charge Rate</rdf:li>+ <rdf:li>RoHS Compliant and 100% Lead (Pb)-Free</rdf:li>+ </rdf:Bag>+ </dc:subject>+ <dc:creator>+ <rdf:Seq>+ <rdf:li/>+ </rdf:Seq>+ </dc:creator>+ <dc:title>+ <rdf:Alt>+ <rdf:li xml:lang="x-default">Linear Single Cell Li-Ion Battery Charger IC</rdf:li>+ </rdf:Alt>+ </dc:title>+ <dc:description>+ <rdf:Alt>+ <rdf:li xml:lang="x-default">The RT9505 is a fully integrated low cost single-cell Li-Ion battery charger IC ,ideal for portable applications. The RT9505 is capable of being powered up from ,AC adapter. The RT9505 enters sleep mode when AC adapter is removed.,The RT9505 optimizes the charging task by using a control algorithm including ,preconditioning mode, fast charge mode and constant voltage mode. The charging ,task is terminated as the charge current drops below the preset threshold. The ,AC adapter charge current can be programmed up to 1A with an external resister. ,The internal thermal feedback circuitry regulates the die temperature to ,optimize the charge rate for all ambient temperatures.,The RT9505 features 18V maximum rating voltages for AC adapter. 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