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Monolithic Power Systems Inc. MP8020GQV-Z
- Part No.:
- MP8020GQV-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 18-VQFN Exposed Pad
- Datasheet:
-
MP8020GQV-Z.pdf
- Description:
- 802.3AF/AT/BT-COMPLIANT, POE POW
- Quantity:
- Payment:
- Shipping:
Inventory:6,638
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Product details
Overview
MP8020GQV-Z from Monolithic Power Systems is an IEEE 802.3af/at/bt-compliant Powered Device (PD) interface IC with integrated 100V hot-swap MOSFET, configurable inrush/operation current limiting, automatic maintain power signature (MPS), and dual-power-source arbitration (PSE + auxiliary adapter). It supports up to 71.3W PD operation, features GATE1/GATE2 drivers for external N-channel MOSFETs, and delivers PG signaling for downstream DC/DC enable. Used in high-power PoE endpoints such as PTZ security cameras and WLAN access points.
For engineers reviewing the MP8020GQV-Z datasheet, MP8020GQV-Z pinout, MP8020GQV-Z application, or MP8020GQV-Z equivalent, key selection considerations include IEEE 802.3bt Class 8 classification support, 0.35Ω internal RDS(ON), 37% duty-cycle MPS output, 40V VDD UVLO turn-on threshold, and QFN-18 (3mm×5mm) thermal performance with θJA = 46°C/W.
Technical Context
The MP8020 implements full IEEE 802.3af/at/bt detection (25kΩ internal RDET), 5-event classification (CLSA/CLSB pins), and automatic MPS generation via R_MPS pin with programmable duty cycle (6–37%). Its dual-MOSFET architecture separates PSE power path (internal 100V MOSFET + GATE1-driven external FET) from adapter backup path (GATE2 + AUX detection).
Current control is split: ILIM pin configures internal MOSFET limit (0.9A–1.6A), while SENSE pin sets external MOSFET limit (22–30mV threshold). Thermal shutdown at 150°C with 20°C hysteresis and wide-input UVLO (30–40V hysteresis) ensure robust operation across industrial temperature range (−40°C to +125°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Resistance | 25 kΩ - Enables IEEE 802.3af/at/bt compliant detection without external resistor |
| Max PD Power Support | 71.3 W - Full Class 8 operation per IEEE 802.3bt Type 4 PSE |
| Internal MOSFET RDS(ON) | 0.35 Ω - Limits conduction loss for ≤51W designs using internal switch only |
| VDD UVLO Threshold | 38.5 V (rising) / 31.5 V (falling) - 7 V hysteresis prevents oscillation during brownout |
| MPS Duty Cycle | 37% (Type 1/2 PSE) or 6–17% (Type 3/4 PSE, configurable via DUTY pin) - Maintains PSE recognition under light load |
| GATE1 Drive Voltage | 6 V max - Compatible with standard logic-level N-channel MOSFETs for >51W designs |
| AUX UVLO Threshold | 8.3 V rising / 7.0 V falling - Ensures clean switchover from PSE to ≥8.8V wall adapter |
Pinout & Package
MP8020GQV-Z is housed in a thermally enhanced QFN-18 package (3mm × 5mm, 0.5mm pitch) with exposed thermal pad. Pin numbering follows top-view layout per MPS EV8020-QV-00A reference board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VDD | PoE input supply rail | Accepts 0–57V PSE voltage; feeds internal bias and hot-swap FET source |
| 2 GND | Power and signal reference | Common return for all analog/digital functions and thermal pad connection |
| 3 GATE2 | Adapter power MOSFET driver | Drives external N-FET for seamless PSE-to-adapter switchover with low-loss arbitration |
| 4 VADP | Auxiliary adapter input | Accepts 0–57V wall adapter; enables dual-source redundancy |
| 5 AUX | Adapter UVLO detector | Sets 8.3V adapter turn-on threshold; must be pulled to GND if unused |
| 6 R_MPS | Maintain power signature output | Generates 24V pulse train (37% duty) to sustain PSE power allocation during idle |
| 7 ILIM | Internal MOSFET current limit selector | Configures 0.9A or 1.6A limit via resistor to GND (7.15kΩ = 1.6A) |
| 8 DUTY | MPS duty cycle setting | Adjusts MPS on-time from 6% to 37% for Type 3/4 PSE compatibility |
| 9 PRI | Power source priority control | Pull-up to internal 5V: PSE preferred; pull-down: adapter preferred |
| 10 CLSA | Class event 1–2 signature output | Drives classification current (1.16V typical) during first two events |
| 11 CLSB | Class event 3+ signature output | Drives classification current during remaining events; supports 8-class bt mode |
| 12 BT | Type indicator (open-drain) | Signals PSE type (af/at/bt); low = Type 2+, high-impedance = Type 1 |
| 13 TYP2 | Power type indicator (open-drain) | Indicates allocated power type (e.g., Type 4 = BT=low, TYP1=high, TYP2=low) |
| 14 TYP1 | Power type indicator (open-drain) | Used with TYP2 to encode PSE power capability per IEEE 802.3bt Table 33-11 |
| 15 PG | Power good status (open-drain) | Asserts after successful classification and stable VOUT; enables downstream DC/DC |
| 16 SRC | Hot-swap MOSFET source output | Delivers regulated PoE power to load; connects to internal FET source and external FET drain |
| 17 GATE1 | PSE power MOSFET driver | Drives parallel external N-FET after 90ms delay; disabled if VDD–VSRC >10V |
| 18 SENSE | External MOSFET current sense | Monitors VDD–SENSE voltage drop; 26mV threshold sets external FET current limit |
Key Features
| Feature | Design Value |
|---|---|
| IEEE 802.3af/at/bt compliance | Fully integrated detection, 5-event classification, and MPS - eliminates need for discrete classification circuitry |
| Configurable dual-MOSFET control | Internal 0.35Ω FET for ≤51W + GATE1/GATE2 drivers for scalable high-power (>71W) and adapter-failover designs |
| Adaptive maintain power signature | R_MPS pin outputs precise 24V pulse train with user-selectable duty (6–37%) - maintains PSE power allocation without load current |
| Intelligent power arbitration | PRI pin + AUX detector + GATE2 driver enable zero-crossing, low-loss switchover between PSE and adapter supplies |
| Robust thermal and electrical protection | 150°C OTP with 20°C hysteresis, 100V absolute max VDD rating, and 7V UVLO hysteresis - ensures reliability in harsh PoE environments |
Applications
| Security Cameras | WLAN Access Points |
|---|---|
|
Use Scenario: Outdoor PTZ camera with heater, IR illuminator, and video streaming over single Ethernet cable. IC Role / Device Role / Timing Role: PD interface managing 51W+ power negotiation, inrush limiting during pan/tilt motor startup, and seamless failover to local adapter during PSE outage. Use Value: Enables Class 7/8 power delivery (62–71.3W), reduces BOM count by integrating detection resistor and MPS generator, and sustains camera operation during network power interruption. |
Use Scenario: High-density 802.11ax access point with multiple radios, USB peripherals, and PoE-powered IoT gateway functions. IC Role / Device Role / Timing Role: Dual-source PD controller coordinating PSE power allocation (Class 4–8), adapter backup activation, and PG-synchronized DC/DC sequencing for RF subsystems. Use Value: Supports simultaneous multi-radio operation at full transmit power, eliminates need for external classification resistors, and provides deterministic 90ms GATE1 turn-on timing for bulk capacitor charging. |
| VoIP Video Phones | IoT Edge Gateways |
|
Use Scenario: Enterprise-grade video phone with touchscreen, speakerphone, and real-time video conferencing requiring uninterrupted power. IC Role / Device Role / Timing Role: Low-noise PD interface delivering stable 30W power, maintaining MPS during call standby, and enabling fast adapter switchover during PSE maintenance. Use Value: Guarantees continuous operation during PSE firmware updates via AUX-triggered GATE2 activation, reduces standby current to 1.5mA, and meets strict EMI requirements via controlled inrush ramp. |
Use Scenario: Industrial IoT gateway aggregating sensor data via RS-485, CAN, and wireless protocols, powered exclusively via PoE. IC Role / Device Role / Timing Role: High-reliability PD managing 40W Class 6 power, thermal derating above 85°C, and automatic MPS duty adjustment for varying load profiles. Use Value: Extends operational lifetime in unventilated enclosures via 150°C thermal shutdown, supports deterministic classification timing (≤1ms stability), and enables remote firmware updates without power cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Powered Device interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT4275AIMSE#PBF | IEEE 802.3at-only (no 802.3bt), no integrated detection resistor, requires external RDET; 100V MOSFET, but no GATE2 for adapter arbitration | Limited to Class 4 (30W); cannot support Class 5–8 or automatic adapter switchover | Select when 802.3bt and dual-source operation are unnecessary; higher BOM cost due to external components |
| MAX5984DETE+T | Supports 802.3af/at/bt but lacks integrated RDET and R_MPS output; uses external MPS resistor network; no GATE2 driver | Requires additional discretes for MPS and adapter control; less compact than MP8020's single-chip solution | Choose only if legacy MAX5984 design reuse is required; MP8020 offers superior integration and thermal performance |
Compared with LT4275 and MAX5984, MP8020GQV-Z delivers full 802.3bt Class 8 support in a single QFN-18 package with integrated detection, MPS generation, and dual-MOSFET arbitration-reducing PCB area by ≥35% and eliminating ≥7 external components versus alternatives.
Availability
MP8020GQV-Z is available at Aetrix Electronics and suitable for security cameras, WLAN access points, VoIP video phones, and IoT edge gateways requiring stable component supply, long-term lifecycle assurance, and IEEE 802.3bt compliance.
Supply support for MP8020GQV-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 power management ICs, with over 20 years of leadership in DC/DC converters, PoE interfaces, and motor drivers.
The MP8020 belongs to MPS's IEEE 802.3bt-compliant Powered Device interface product line, designed specifically for high-power, dual-source PoE endpoints demanding minimal external components, robust thermal behavior, and seamless PSE-to-adapter transition.
FAQ
What is the maximum power class supported by MP8020GQV-Z?
The MP8020GQV-Z fully supports IEEE 802.3bt Class 8, enabling up to 71.3W delivered power to the load. This is achieved through 5-event classification, programmable current limits, and coordinated internal/external MOSFET operation - verified per MPS datasheet Rev. 1.0, Table 1 and Section "OPERATION".
Does MP8020GQV-Z require external detection or classification resistors?
No. The MP8020GQV-Z integrates a precision 25kΩ detection resistor (RDET) and supports all classification events (CLSA/CLSB) internally. External resistors are only needed for optional functions: ILIM (current limit setting), DUTY (MPS duty), and RSENSE (external MOSFET current sense).
How does the automatic maintain power signature (MPS) function work?
The R_MPS pin outputs a 24V, current-limited pulse train with configurable duty cycle (6–37%) to sustain PSE power allocation during low-load or standby conditions. Duty is set by DUTY pin voltage (0.8V/1.0V/2.2V/2.5V), and timing is factory-trimmed - detailed in Electrical Characteristics Table on page 7 of the datasheet.
Can MP8020GQV-Z operate with both PoE and an auxiliary adapter simultaneously?
No - it performs intelligent arbitration, not parallel operation. When both sources are present, the PRI pin determines priority: internal pull-up favors PSE; external pull-down favors adapter. GATE2 activates the adapter FET only after PSE removal or failure, ensuring zero-current switchover with <100μs latency.
What thermal protection mechanisms are implemented?
The MP8020GQV-Z includes junction temperature monitoring with 150°C thermal shutdown (TSD) and 20°C hysteresis (THYS). It also features wide-input UVLO (30–40V) and current foldback during overload - all specified in Absolute Maximum Ratings and Electrical Characteristics sections of the datasheet.
Is the QFN-18 package lead-free and RoHS-compliant?
Yes. Per MPS documentation, all MP8020 variants including MP8020GQV-Z are lead-free, halogen-free, and fully compliant with the EU RoHS Directive. Green status verification is available on the MPS Quality Assurance webpage.
What is the purpose of the SENSE pin?
The SENSE pin monitors voltage drop across an external sense resistor (RSENSE) to set current limit for the external MOSFET driven by GATE1. A 26mV threshold triggers foldback; if unused, SENSE must be tied to VDD - confirmed in Pin Functions table (page 3) and Hot-Swap MOSFET section (page 17).
MP8020GQV-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 18-VQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Controller (PD)
- Number of Channels:
- 1
- Power - Max:
- 71.3 W
- Internal Switch(s):
- Both
- Auxiliary Sense:
- Yes
- Standards:
- 802.3at (PoE+), 802.3af (PoE), 802.3bt
- Voltage - Supply:
- 0V ~ 57V
- Current - Supply:
- 1mA
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 18-QFN (3x5)
MP8020GQV-Z FAQ
1.How can I place an order for MP8020GQV-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP8020GQV-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 MP8020GQV-Z reliable?
The price and inventory of MP8020GQV-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP8020GQV-Z is usually 5 days.
3.What payment methods are accepted for MP8020GQV-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP8020GQV-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP8020GQV-Z?
MP8020GQV-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP8020GQV-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 MP8020GQV-Z?
For technical support, including MP8020GQV-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP8020GQV-Z requirements.
6.How does Aetrix verify that MP8020GQV-Z is sourced from the original manufacturer or authorized distributors?
All MP8020GQV-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 MP8020GQV-Z meets industry standards.
7.What is the process for return or replacement of MP8020GQV-Z?
All MP8020GQV-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP8020GQV-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 MP8020GQV-Z part is unused and in its original packaging.
Return procedure for MP8020GQV-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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