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Monolithic Power Systems Inc. MP8003AGQ-Z
- Part No.:
- MP8003AGQ-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MP8003AGQ-Z.pdf
- Description:
- IC POE CNTRL IEEE 802.3AF 10QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,027
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Product details
Overview
MP8003AGQ-Z from Monolithic Power Systems is an IEEE 802.3af/at-compliant powered device (PD) interface controller for Power over Ethernet systems. It integrates a 100V, 0.48Ω hot-swap MOSFET, supports 2-event classification up to Class 4, delivers 120mA inrush and 840mA operational current limiting, and provides auxiliary adapter detection with seamless power switchover-used in PoE-powered security cameras and VoIP phones.
For engineers reviewing the MP8003AGQ-Z datasheet, MP8003AGQ-Z pinout, MP8003AGQ-Z application, or MP8003AGQ-Z equivalent, key selection criteria include PoE classification compliance level, integrated pass-FET RDS(on), inrush vs. operating current limits, T2P signaling capability, and AUX-based wall-adapter handover behavior.
Technical Context
The MP8003AGQ-Z implements full IEEE 802.3af/at PD interface logic including detection (2.7–10.1V signature range), 1-event or 2-event classification (14.5–20.5V), and mark-event sequencing for Type-2 PSE identification. Its control architecture manages inrush-to-operational transition via RTN voltage sensing and a fixed 100ms delay timer.
It features dual-input power management: VDD–VSS from PoE (up to 57V) and AUX-referenced wall adapter detection with –2.3V threshold relative to VDD. Thermal shutdown activates at 150°C with 20°C hysteresis, and UVLO operates with 37.5V turn-on and 31V turn-off thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Voltage Range | 2.7V to 10.1V - defines valid signature window for PSE recognition before power application |
| Classification Current | 38.2–42.6mA at Class 4 - sets maximum input power allocation (25.5W) to PSE |
| Hot-Swap MOSFET RDS(on) | 0.48Ω - enables low-loss power delivery while supporting 100V DC withstand rating |
| Inrush / Operation Current Limit | 120mA / 840mA - controls capacitor charging surge and steady-state load current separately |
| AUX Detection Threshold | VDD − AUX = −2.3V - triggers automatic switch from PoE to auxiliary adapter supply |
| T2P Output Type | Open-drain, active-low - signals Type-2 PSE presence or AUX activation without external pull-up |
| PG Assertion Logic | Pulled high by internal 7µA current source - directly enables downstream DC/DC converter after RTN ≥1.2V |
Pinout & Package
MP8003AGQ-Z is housed in a thermally enhanced QFN-10 (3mm × 3mm) package with exposed thermal pad connected to VSS. The package supports high-voltage isolation between PoE input rails and logic-side terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VSS | Negative PoE input rail reference | Primary ground return for detection, classification, and hot-swap circuitry |
| 2 FTY | Factory test only | Must be tied to VSS in application; no user functionality |
| 3 CLASS | Classification current sink | Connects to VSS via resistor to set PD power class (e.g., 28.7Ω = Class 4) |
| 4 T2P | Type-2 PSE indicator output | Open-drain signal pulled low when Type-2 PSE or AUX is active |
| 5 AUX | Auxiliary adapter detector input | Senses voltage difference from VDD to enable wall-adapter priority mode |
| 6 DET | Detection signature input | Accepts 24.9kΩ resistor to VDD to present IEEE-compliant detection signature |
| 7 VDD | PoE positive input rail | Receives rectified 44–57V PoE power; feeds internal bias and gate driver |
| 8 PG | Power-good status indicator | Internal current-source output signaling stable RTN voltage or AUX presence |
| 9 NC | No connection | Internally unconnected; may be tied to VSS or thermal pad for layout stability |
| 10 RTN | Hot-swap MOSFET drain output | Delivers controlled PoE power to downstream DC/DC converter input |
Key Features
| Feature | Design Value |
|---|---|
| IEEE 802.3af/at Compliance | Fully implements detection, classification, mark-event, and 2-event Class 4 handshake per standard |
| Integrated 100V Hot-Swap Switch | 0.48Ω RDS(on) MOSFET eliminates need for external high-voltage pass device |
| Adaptive Inrush Control | 120mA limit during CIN charging, auto-switches to 840mA once RTN ≥1.2V |
| Seamless Dual-Source Power Management | AUX detection enables automatic switchover from PoE to wall adapter without brownout |
| Self-Contained PG and T2P Signaling | Internal current-source PG and open-drain T2P eliminate external pull-up components |
Applications
| Security Camera Systems | VoIP Telephony Devices |
|---|---|
|
Use Scenario: Indoor/outdoor IP cameras powered exclusively via Cat5e/Cat6 cabling with remote PoE switch support. IC Role / Device Role / Timing Role: PD interface controller managing detection, classification, and inrush-limited power delivery to camera imaging and processing subsystems. Use Value: Enables single-cable deployment with guaranteed 25.5W (Class 4) delivery, thermal shutdown protection, and auxiliary adapter fallback during PoE outage. |
Use Scenario: Enterprise desk phones requiring IEEE-compliant PoE startup, low standby current, and local AC adapter backup. IC Role / Device Role / Timing Role: Powered device controller coordinating classification handshake with PSE and enabling downstream DC/DC converter only after stable RTN voltage. Use Value: Eliminates external hot-swap FET and discrete classification resistors; AUX detection ensures uninterrupted operation during network power loss. |
| WLAN Access Points | Industrial IoT Gateways |
|
Use Scenario: Dual-band 802.11ac access points deployed in ceiling-mounted enclosures with limited thermal dissipation. IC Role / Device Role / Timing Role: PoE front-end controller providing 2-event classification, T2P signaling for high-power mode negotiation, and PG-controlled DC/DC enable. Use Value: Supports 802.3at Type-2 power delivery up to 30W, with integrated thermal protection preventing latch-up under sustained load or ambient heat. |
Use Scenario: Edge gateways aggregating sensor data in factory environments where PoE reliability must coexist with local AC backup. IC Role / Device Role / Timing Role: Dual-input PD controller managing failover between PoE infrastructure and wall adapter using AUX voltage differential sensing. Use Value: Maintains system uptime during PoE switch maintenance or cable faults via automatic AUX activation without software intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PoE powered device interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT4275AIMSE#PBF | Higher 105V absolute max input; requires external pass FET; supports 4-event classification | Better suited for industrial PoE systems requiring extended voltage margin and programmable classification sequences | Select when >100V transient immunity or custom classification timing is required |
| TPS23753APWR | Integrated DC/DC controller; lower 60V max input; fixed 1-event classification only | Targets cost-sensitive, lower-power (≤13W) PoE devices without Type-2 or 2-event needs | Select when integrated flyback control and simpler classification suffice |
Compared with LT4275AIMSE#PBF and TPS23753APWR, MP8003AGQ-Z offers optimal balance of integrated 100V hot-swap switching, native 2-event Class 4 support, and auxiliary power handover-making it ideal for mid-power PoE endpoints needing robustness without external FET complexity or full DC/DC integration.
Availability
MP8003AGQ-Z is available at Aetrix Electronics and suitable for security camera deployments, VoIP phone manufacturing, and WLAN access point production requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle assurance.
Supply support for MP8003AGQ-Z includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with design centers across Asia and North America.
The MP8003A belongs to MPS's PoE interface controller product line, engineered specifically for IEEE 802.3af/at-compliant powered devices requiring integrated hot-swap FETs, dual-input power management, and reliable classification signaling.
FAQ
What is the maximum PoE input voltage the MP8003AGQ-Z can safely handle?
The MP8003AGQ-Z supports a continuous PoE input voltage range of 0V to 57V on VDD–VSS, with absolute maximum rating of +100V. Its integrated 100V hot-swap MOSFET and internal clamping circuits ensure safe operation under IEEE 802.3at transient conditions and common-mode surges typical in enterprise cabling environments.
How does the MP8003AGQ-Z distinguish between Type-1 and Type-2 PSEs?
The MP8003AGQ-Z uses 2-event classification: the PSE applies two classification cycles separated by a mark event (6.9–10.1V). During the first cycle, the IC presents Class 4 current; during the second, it repeats the same. Only Type-2 PSEs perform this sequence, causing the T2P pin to assert low-providing hardware-level identification without software polling.
Can the MP8003AGQ-Z operate with both PoE and a wall adapter simultaneously?
No-MP8003AGQ-Z implements OR-ing logic, not parallel operation. When AUX detects VDD − VAUX ≤ −2.3V, it disables the internal hot-swap MOSFET and CLASS circuitry, routing power solely through the adapter path. The T2P and PG outputs remain active to signal the change, ensuring downstream converters stay enabled.
What is the purpose of the FTY pin, and how should it be connected?
The FTY pin is reserved for factory testing and has no functional role in end-user applications. Per the datasheet, FTY must be externally connected to VSS in all designs to ensure proper internal biasing and avoid undefined behavior during startup or fault conditions.
Does the MP8003AGQ-Z require external components for IEEE 802.3af/at compliance?
Yes-external components are required for full compliance: a 24.9kΩ resistor between DET and VDD for detection signature, a classification resistor (e.g., 28.7Ω for Class 4) between CLASS and VSS, and a TVS diode (e.g., SMAJ58A) across VDD–VSS for transient suppression. These are specified in the datasheet's Application Information section.
How does the PG signal behave during thermal shutdown?
During thermal shutdown (junction temperature >150°C), the MP8003AGQ-Z disables the hot-swap MOSFET and pulls PG low via its internal 1MΩ pull-down resistor. PG remains low until junction temperature falls below 130°C, at which point the IC resumes inrush charging and reasserts PG high after RTN reaches 1.2V and the 100ms delay expires.
Is the NC pin electrically isolated or internally bonded?
The NC pin is not connected to any internal circuitry-it is truly no-connect. However, the datasheet recommends connecting it to VSS or the exposed thermal pad during PCB layout to improve mechanical stability and thermal conduction, not for electrical functionality.
MP8003AGQ-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Controller (PD)
- Number of Channels:
- -
- Power - Max:
- 25.5 W
- Internal Switch(s):
- No
- Auxiliary Sense:
- Yes
- Standards:
- 802.3at (PoE+), 802.3af (PoE)
- Voltage - Supply:
- 0V ~ 57V
- Current - Supply:
- 840mA
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-QFN (3x3)
MP8003AGQ-Z FAQ
1.How can I place an order for MP8003AGQ-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP8003AGQ-Z on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MP8003AGQ-Z reliable?
The price and inventory of MP8003AGQ-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP8003AGQ-Z is usually 5 days.
3.What payment methods are accepted for MP8003AGQ-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP8003AGQ-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP8003AGQ-Z?
MP8003AGQ-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP8003AGQ-Z order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MP8003AGQ-Z?
For technical support, including MP8003AGQ-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP8003AGQ-Z requirements.
6.How does Aetrix verify that MP8003AGQ-Z is sourced from the original manufacturer or authorized distributors?
All MP8003AGQ-Z products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MP8003AGQ-Z meets industry standards.
7.What is the process for return or replacement of MP8003AGQ-Z?
All MP8003AGQ-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP8003AGQ-Z, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MP8003AGQ-Z part is unused and in its original packaging.
Return procedure for MP8003AGQ-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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