MP8009AGV-Z

@@ -0,0 +1,70 @@+# MP8009AGV-Z++**Monolithic Power Systems** · Power Over Ethernet (PoE) Controllers · QFN-28(4x5)++MP8009AGV-Z from Monolithic Power Systems, in a QFN-28(4x5). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | NC | unconnected | Not connected. Recommended to connect NC pins to GND. |+| 2 | AUX | input | Auxiliary power input detection. Pulling AUX 2.3V below VDD turns off the hot-swap MOSFET and disables classification (CLASS), forcing T2P and PG active. Voltage range with respect to VDD: -6.5V to +0.3V. |+| 3 | DET | passive | PoE detection. Connect a 24.9kΩ resistor between VDD and DET for Power over Ethernet detection signature. |+| 4 | VDD | power_in | Positive power supply terminal for the PoE input and the controller input power rail. Operating range 0V to 57V; absolute max 100V with respect to GND/VSS. |+| 5 | NC | unconnected | Not connected. Recommended to connect NC pins to GND. |+| 6 | NC | unconnected | Not connected. Recommended to connect NC pins to GND. |+| 7 | NC | unconnected | Not connected. Recommended to connect NC pins to GND. |+| 8 | MODE | input | Primary-side regulation, secondary-side regulation, and dead time selection. Float MODE for PSR; connect a resistor from MODE to GND for SSR. Also sets dead time between GATE and SYNC. |+| 9 | COMP | output | Loop compensation. Functions as the error amplifier (EA) output during PSR. Pulled up to 5V internally via a 10kΩ resistor during SSR. |+| 10 | FB | input | Output voltage feedback and over-voltage protection monitor. Connect a resistor divider from the sense winding to regulate VOUT during PSR; the internal EA is disabled during SSR. FB detects the OVP signal during both PSR and SSR. Voltage range -0.5V to +5.5V. |+| 11 | GND | power_in | Ground reference for the controller. |+| 12 | GND | power_in | Ground reference for the controller. |+| 13 | SYNC | output | Synchronous MOSFET gate driver output. 0.8A drive capability; absolute max -0.3V to +18V with respect to GND. |+| 14 | NC | unconnected | Not connected. Recommended to connect NC pins to GND. |+| 15 | GATE | output | Main MOSFET gate driver output. 2A drive capability; absolute max -0.3V to +18V with respect to GND. |+| 16 | NC | unconnected | Not connected. Recommended to connect NC pins to GND. |+| 17 | VCC | power_in | DC/DC internal circuit supply. Powered by an internal LDO regulator from VDD; connect a bypass capacitor CVCC between VCC and GND (≥1µF for flyback, 4.7µF for forward). May be powered externally to reduce LDO loss. Absolute max +18V. |+| 18 | SENSE | input | Primary current sense, PSR output voltage compensation, and frequency dithering setting. Configures VOUT compensation and frequency dithering via resistors (RREG, RSENSE) between SENSE and GND. |+| 19 | PG | output | PD supply power good indication (open-drain). Enables the DC/DC converter internally; pulled up via an internal current source when the PD output is good. Float PG for most applications. Absolute max +6.5V; sink current 0.5mA. |+| 20 | RTN | power_out | PD hot-swap MOSFET drain (internal pass MOSFET output to the DC/DC converter return). Tie RTN and GND together and connect the exposed thermal pad to RTN/GND for thermal dissipation. Absolute max -0.3V to +100V with respect to VSS. |+| 21 | RTN | power_out | PD hot-swap MOSFET drain (internal pass MOSFET output). Tie RTN and GND together and connect the exposed thermal pad to RTN/GND for thermal dissipation. |+| 22 | NC | unconnected | Not connected. Recommended to connect NC pins to GND. |+| 23 | VSS | power_in | PoE input power rail negative supply terminal (PoE return). |+| 24 | VSS | power_in | PoE input power rail negative supply terminal (PoE return). |+| 25 | FTY | passive | Factory use only. Connect FTY to VSS. Absolute max -0.3V to +6.5V with respect to VSS. |+| 26 | CLASS | passive | PoE classification. Connect a resistor between CLASS and VSS to configure the classification current (ICLASS). Absolute max -0.3V to +6.5V with respect to VSS. |+| 27 | NC | unconnected | Not connected. Recommended to connect NC pins to GND. |+| 28 | T2P | output | Type-2 power-sourcing equipment indication (open-drain). Pulled down to VSS to indicate the presence of a wall adapter or Type-2 PSE. Sink current 10mA max. |+| EP | EP | power_in | Exposed thermal pad. Connect to RTN and GND to improve thermal dissipation. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Monolithic Power Systems |+| Package | QFN-28(4x5) |+| Category | Power Management (PMIC) |+| Pins | 29 |++## Ordering variants++Same part, different packaging or reel option.++- `MP8009AGV-ZZ`++## CAD (KiCad official)++- Symbol: `MP8009AGV-Z`+- Footprint: `Package_DFN_QFN:QFN-28-1EP_4x5mm_P0.5mm_EP2.65x3.65mm`+- 3D model: QFN-28(4x5) (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Monolithic Power Systems datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602761745937555456) (41 pp, sha256 `96d79ad4b1a24775`, retrieved 2026-08-17, tier: lcsc)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/mp8009agv-z-datasheet.pdf)

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