MP8003AGQ-Z - 802.3af/at PoE PD Controller, 100V FET | MPS
MPN: MP8003AGQ-Z ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.35 | $2.35 |
| 10 | $2.11 | $21.10 |
| 100 | $1.82 | $182.00 |
| 500 | $1.58 | $790.00 |
| 1,000 | $1.38 | $1,380.00 |
MP8003AGQ-Z Overview
A PoE powered device interface controller is the circuit that sits between the Ethernet data pair (or spare pairs) and the DC-DC converter inside a powered device such as an IP camera, wireless access point, or VoIP phone. Within the power management hierarchy, it belongs to the PoE PD controller family, which performs PD detection signature presentation, class signaling, inrush current limiting, and load switch control as mandated by the IEEE 802.3af/at standards.
Key features include full compliance with IEEE 802.3af and 802.3at, an integrated 100V hot-swap MOSFET that eliminates an external pass switch, programmable input current control, and AUX power prioritization logic. During startup the MP8003A sets the inrush current limit at approximately 120mA; once the output pass switch is fully enhanced, the limit switches to approximately 840mA, protecting the PSE supply during cable discharge events while supporting PoE+ class 4 loads.
Architecturally, the part combines a precision detection/classification front end with a current-controlled hot-swap power path. The 2-event classification support enables IEEE 802.3at PoE+ power levels without the layer-2 LLDP negotiation requirement, simplifying firmware in cost-sensitive devices.
Typical applications include PoE-powered IP security cameras, 802.11 wireless access points, VoIP telephones, networked LED drivers, and industrial Ethernet endpoints that must fall back to auxiliary adapter power when PoE is unavailable.
A key design consideration is thermal management of the integrated hot-swap MOSFET: use the QFN exposed pad with a solid ground pour to conduct switching-inrush heat into the PCB, and place bulk capacitance at VDD and the gate-driver output per the MPS datasheet recommendations.
This page synthesizes distributor pricing context, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for MP8003AGQ-Z — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MP8003AGQ-Z (same form factor and footprint) — differing in Detection, Function, Input Current Control, Package, Standards Compliance.
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MP8003AGQ
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MP8003A
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View Datasheet →MP8003AGQ-Z Maximum Ratings & Electrical Characteristics
| Function | IEEE 802.3af/at PoE PD interface controller with AUX control |
| Standards Compliance | IEEE 802.3af (PoE), IEEE 802.3at (PoE+) |
| Powered Device Channels | 1 |
| Integrated Hot-Swap MOSFET Rating | 100 V |
| Inrush Current Limit (startup) | Approx. 120 mA |
| Operating Current Limit (switch enhanced) | Approx. 840 mA |
| Classification | 1-event and 2-event classification |
| Detection | PD detection signature per IEEE 802.3af/at |
| Input Current Control | Yes (programmable) |
| Auxiliary Power Control | Yes (AUX with PoE priority logic) |
| Package | QFN-10 (3x3 mm) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant (RoHS per distributor listings) |
MP8003AGQ-Z qfn-10 (3x3 mm) Pin Configuration Guide
Pin configuration for MP8003AGQ-Z (qfn-10 (3x3 mm) package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for MP8003AGQ-Z.
Refer to the datasheet for full pin configuration.
Typical Applications
MP8003AGQ-Z is suitable for 6 applications: PoE IP Security Cameras, 802.11 Wireless Access Points, VoIP Telephones, PoE LED Lighting and Smart Luminaires, Industrial Ethernet Endpoint Devices, Networking Test and Measurement Equipment.
PoE IP Security Cameras
IP surveillance cameras are the flagship application for the MP8003AGQ-Z. The controller presents the IEEE 802.3af/at detection and classification signature to the PoE switch, supports 2-event classification to obtain class 4 (PoE+) budgets of up to 25.5W at the powered device for PTZ cameras with IR illuminators, and limits startup inrush to approximately 120mA so long cable runs and PSE ports are not tripped. Its integrated 100V hot-swap MOSFET removes the external pass switch, shrinking the camera's power-entry PCB area, while the ~840mA operating limit protects the downstream buck converter. AUX control lets the same camera run from a local 12V adapter when PoE is unavailable, making the power entry fully dual-source with PoE priority handled in silicon.
Recommended
802.11 Wireless Access Points
Enterprise and mesh Wi-Fi access points are typically powered directly from the PoE switch that also carries their data. The MP8003AGQ-Z handles the full powered-device handshake - detection, 1-event and 2-event classification, and input current control - so the access point advertises the correct 802.3at power class for multi-radio designs. The integrated 100V hot-swap MOSFET survives PoE transients and cable-discharge events common in ceiling installations, and the two-stage 120mA/840mA current limiting ensures reliable startup with the large bulk capacitance used in AP power stages. AUX input support allows desktop or lab powering from a wall adapter during commissioning without changing hardware.
Recommended
VoIP Telephones
VoIP desk phones draw power entirely from the Ethernet cable under IEEE 802.3af (class 2/3 budgets). The MP8003AGQ-Z presents the correct detection signature to legacy PSEs and limits inrush to approximately 120mA during capacitor charging, meeting 802.3af timing requirements that older switches strictly enforce. Its 100V-rated hot-swap MOSFET tolerates the highest allowed PSE open-circuit voltages, and the AUX power control gives users a fallback AC adapter option for deployments without PoE infrastructure. The compact QFN-10 (3x3 mm) package fits the constrained handset base PCB, while input current control keeps the phone within its declared power class during ring and speaker operation.
Recommended
PoE LED Lighting and Smart Luminaires
Networked LED luminaires increasingly use PoE as both data and power backbone. The MP8003AGQ-Z negotiates the power contract with the PSE via 1-event or 2-event classification and protects the luminaire input with its integrated 100V hot-swap MOSFET and approximately 120mA startup inrush limit. The ~840mA operating limit is suitable for mid-power LED strings driven by downstream constant-current converters. AUX control enables hybrid fixtures that can run from PoE or a local driver, and the small QFN-10 footprint suits the slim driver boards used in track lighting and downlights where thermal relief through the ground pour is straightforward to provide.
Recommended
Industrial Ethernet Endpoint Devices
Factory-floor devices such as IIoT sensors, gateways, and Ethernet I/O modules benefit from single-cable PoE deployment. The MP8003AGQ-Z provides standards-compliant PD detection, classification, and input current control that coexist with industrial PSE injector equipment, while its 100V hot-swap MOSFET gives margin against the long, inductively-loaded cable runs typical in plants. The 120mA/840mA two-stage current limit ensures orderly power-up of microcontroller and communication circuitry, and AUX power control supports redundant powering schemes where a 24V panel supply backs up the PoE feed. The RoHS-compliant QFN-10 package supports industrial lead-free assembly processes.
Recommended
Networking Test and Measurement Equipment
PoE testers, injectors, and protocol analyzers must emulate or load a powered device interface under controlled conditions. The MP8003AGQ-Z provides a real, standards-compliant PD signature with genuine 1-event and 2-event classification behavior and datasheet-defined 120mA inrush / 840mA operating current limits, letting instruments exercise PSE detection and fault-timing circuits authentically. Its AUX control input allows the test bench to inject external power while observing PoE priority handover, useful for validating dual-source products. The QFN-10 (3x3 mm) package integrates cleanly into modular test-front-end cards, with the exposed pad providing repeatable thermal performance across instrument temperature calibrations.
Recommended
Recommended Products Summary
Engineering reference data for MP8003AGQ-Z — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MP8003AGQ | MP8003A |
|---|---|---|---|
| Package | QFN-10 (3x3 mm) | QFN-10 (3x3 mm) - same | QFN-10 (3x3 mm) - same |
| Brand | Monolithic Power Systems | Monolithic Power Systems | Monolithic Power Systems |
| PoE Standards | IEEE 802.3af / 802.3at | IEEE 802.3af / 802.3at | IEEE 802.3af / 802.3at |
| Integrated Hot-Swap MOSFET | 100 V integrated | 100 V integrated | 100 V integrated |
| Inrush Current Limit | ~120 mA (startup) | ~120 mA (startup) | ~120 mA (startup) |
| Operating Current Limit | ~840 mA | ~840 mA | ~840 mA |
| Classification Support | 1-event and 2-event | 1-event and 2-event | 1-event and 2-event |
| AUX Power Control | Yes | Yes | Yes |
| RoHS / Lead-Free Suffix | Yes (-Z green suffix) | Non-Z suffix (verify compliance needs) | Base ordering code |
Key Differentiators
- Integrated 100V hot-swap MOSFET (vs TPS2378 (TI))
- Two-stage inrush control (vs MP8003AGQ (non-Z))
- AUX power control on chip (vs MP8003A base part)
Design Notes
The MP8003AGQ-Z integrates the 100V hot-swap MOSFET, so all pass-switch dissipation occurs inside the QFN-10 (3x3 mm) package. Solder the exposed pad to a minimum 2x2 array of thermal vias into a ground pour on the inner layer; without this, repeated PoE cable-discharge events can raise junction temperature substantially. Estimate dissipation as I_rail x Rds(on) of the internal FET during normal operation plus transient energy during the 120mA inrush phase - keep steady-state power path losses under roughly 1W for uncooled ceiling devices per standard QFN thermal resistance expectations.
Size the bulk capacitor at the PD input to charge within the IEEE 802.3af/at classification timing windows. Excessive input capacitance combined with the ~120mA startup limit can stretch startup beyond PSE timeouts and cause endless power-cycling loops. Follow the capacitance recommendation in the MPS MP8003A datasheet typical application, and verify startup on a PoE injector simulator, not just a bench supply, before releasing the design.
Keep the hot-swap power path loop (input bridge -> VDD pin -> internal FET -> output rail) short and wide to minimize transient voltage excursions during cable-discharge events. Place the current-sense and classification network components directly at the IC pins. Keep the AUX power-switch circuitry separated from the detection signature resistor network to avoid corrupting the IEEE detection signature presented to the PSE - MPS's reference design layout should be followed for the AUX prioritization node.
Coordinate the downstream DC-DC converter's current draw with the MP8003AGQ-Z's approximately 840mA operating current limit so that PoE+ class 4 loads start within the limit and the converter does not trip the controller during output ramps. Add soft-start or hiccup-mode settings on the downstream buck so its startup transient stays inside the controller's two-stage limit profile. For dual-source AUX designs, confirm the AUX priority thresholds in the MPS datasheet to guarantee a clean switchover without rail droop.
Compliance Information
The -Z suffix denotes MPS green/lead-free packaging; distributor listings (JLCPCB, Mouser) mark the MP8003AGQ family RoHS. REACH, halogen-free, and conflict-minerals status not stated in provided data.
