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Analog Devices Inc./Maxim Integrated MAX5982AATE+T
- Part No.:
- MAX5982AATE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX5982AATE+T.pdf
- Description:
- IEEE 802.3AF/AT-COMPLIANT, POWER
- Quantity:
- Payment:
- Shipping:
Inventory:2,021
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Product details
Overview
The MAX5982AATE+T from Analog Devices is an IEEE 802.3af/at-compliant powered device (PD) interface controller with integrated 70W isolation MOSFET, supporting PoE detection (24.9kΩ signature), 2-event classification (Class 0–5), and inrush current limiting (≤182mA). It operates across -40°C to +125°C and withstands 100V input, enabling use in IP phones, security cameras, and WiMAX base stations.
For engineers reviewing the MAX5982AATE+T datasheet, MAX5982AATE+T pinout, MAX5982AATE+T application, or MAX5982AATE+T equivalent, this device delivers verified PoE power-handling capability, dual-mode sleep control with LED driver, thermal shutdown at +150°C, and wall-adapter switchover - all in a thermally enhanced 5mm × 5mm TQFN package.
Technical Context
The MAX5982AATE+T implements a two-stage current-limit architecture: initial inrush limit ≤182mA (VRTN = 1.5V), transitioning to 1700–2100mA normal operation after MOSFET enhancement. Its UVLO features 35.4V turn-on, 31V turn-off, and 4.2V hysteresis with 30–120µs deglitching to tolerate cable drop and ensure glitch-free transitions.
It supports IEEE 802.3at Type 2 classification via mark/reset event detection (VTHM = 10.7V, VTHR = 3.8V), provides 2EC latched output for PSE identification, and integrates a programmable LED driver (10–20mA, 250Hz, 25% duty cycle) activated only in sleep/ULP modes - all while maintaining Maintain Power Signature (MPS) compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 60V operating range; 100V absolute max rating enables robust PoE surge tolerance. |
| Inrush Current Limit | ≤182mA during startup - prevents PSE overcurrent trip and ensures safe hot-swap initiation. |
| Normal Operation Current Limit | 1700–2100mA at -40°C to +85°C - supports up to 70W PD power delivery per IEEE 802.3at. |
| Isolation MOSFET RON | 0.1–0.25Ω (TJ = +25°C to +125°C) - minimizes conduction loss and thermal rise under full load. |
| UVLO Threshold | VON = 35.4V, VOFF = 31V, hysteresis = 4.2V - accommodates twisted-pair resistive drop and avoids oscillation during brownout. |
| Thermal Shutdown | +150°C trip, +120°C hysteresis - protects MOSFET and system integrity during overload or poor heatsinking. |
| LED Drive Capability | 10–20mA programmable amplitude, 250Hz/25% duty cycle - enables low-power status indication without external oscillator. |
Pinout & Package
Package: 16-pin, 5mm × 5mm, thermally enhanced TQFN with exposed pad (EP) connected to VSS for optimal power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 2) | Positive supply input | Bypassed with ≥68nF capacitor; powers internal bias rails and logic. |
| DET (Pin 3) | Detection resistor input | Connects to 24.9kΩ signature resistor for IEEE 802.3af/at detection compliance. |
| VSS (Pins 5,6) | Negative supply / MOSFET source | Reference for all internal circuitry; connects directly to MOSFET source terminal. |
| RTN (Pins 7,8) | MOSFET drain / power return | Drain node of integrated 70W n-channel MOSFET; ties to downstream DC-DC ground. |
| WAD (Pin 9) | Wall adapter detector input | Detects >9V between WAD and RTN to trigger seamless PoE-to-wall switchover. |
| PG (Pin 10) | Open-drain power-good output | Sinks 230µA to disable downstream DC-DC until MOSFET fully enhances (tDELAY = 96ms). |
| 2EC (Pin 11) | 2-event classification detect | Latched 1.5mA sink indicating Type 2 PSE detection or wall adapter presence. |
| CLS (Pin 12) | Classification resistor input | Connects to VSS via RCLS (e.g., 615Ω for Class 0) to set IEEE-defined classification current. |
| LED (Pin 13) | LED driver output | Active only in sleep/ULP mode; sources periodic current pulses with amplitude set by RSL. |
| SL (Pin 14) | Sleep mode enable | Falling edge (MAX5982B) or 6s low (MAX5982A) initiates sleep; sets ILED when pulled to VSS. |
| WK (Pin 15) | Wake mode enable | Falling edge exits sleep/ULP mode and restores full operation; internal 2.5kΩ pullup to 5V rail. |
| ULP (Pin 16) | Ultra-low-power sleep enable | Pulled low with WK assertion to enter ULP mode - reduces quiescent current while sustaining MPS. |
Key Features
| Feature | Design Value |
|---|---|
| IEEE 802.3af/at Compliance | Fully validated detection signature (24.9kΩ), 2-event classification (Class 0–5), and Type 2 PSE handshake support. |
| Integrated 70W Isolation MOSFET | RON ≤ 0.25Ω at +125°C eliminates need for external high-power switch and simplifies BOM. |
| Two-Stage Inrush Control | Hard-limited 182mA startup current followed by 1900mA (typ) steady-state limit - meets PSE Class 4/5 requirements. |
| Programmable LED Driver | 250Hz/25% pulsed output with 10–20mA amplitude set by single RSL - enables visual status without MCU involvement. |
| Wall Adapter Switchover | Automatic, glitch-free transition from PoE to auxiliary 9–48V wall adapter with no external logic required. |
| Maintain Power Signature (MPS) | Supported in both normal sleep and ultra-low-power sleep modes - ensures continuous PSE recognition during low-power states. |
Applications
| IP Phones | IP Security Cameras |
|---|---|
|
Use Scenario: Powered via PoE in enterprise VoIP deployments with optional local wall adapter backup. IC Role / Device Role / Timing Role: PD interface controller managing detection, classification, inrush, and seamless wall-adapter switchover. Use Value: Enables IEEE 802.3at Class 4 (30W) operation with thermal shutdown protection and PG-controlled DC-DC sequencing. |
Use Scenario: Outdoor surveillance camera requiring PoE+ power, thermal resilience, and status LED indication. IC Role / Device Role / Timing Role: Integrated PoE PD controller with 70W MOSFET, 2EC flag for PSE type reporting, and programmable LED driver. Use Value: Delivers reliable 50W operation at +125°C ambient, supports MPS in sleep mode, and drives status LED without MCU overhead. |
| WiMAX Base Stations | Wireless Access Nodes |
|
Use Scenario: Remote outdoor base station powered by PoE with backup battery/wall adapter and thermal stress. IC Role / Device Role / Timing Role: High-reliability PD interface with 100V input tolerance, foldback current limiting, and ultra-low-power sleep for standby. Use Value: Sustains MPS in ULP mode (<100µA typical), withstands voltage transients, and enables wake-on-WK for rapid RF subsystem activation. |
Use Scenario: Indoor wireless access point needing compact PoE+ solution with status feedback and failover capability. IC Role / Device Role / Timing Role: Single-chip PD controller handling detection, 2-event classification, PG sequencing, and LED signaling. Use Value: Reduces PCB area vs. discrete solutions, supports Class 5 (60W) delivery, and provides latched 2EC output for PSE firmware diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar powered device interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX5980ATG+T | No integrated MOSFET; requires external 70W switch; lacks LED driver and ULP sleep mode. | Suitable for designs needing discrete MOSFET selection or lower cost where LED indication is unnecessary. | Select when board space allows external FET and ultra-low-power sleep is not required. |
| LT4275AIMSE#PBF | Supports IEEE 802.3bt (90W); higher VIN max (100V); no integrated LED driver; different pinout and classification methodology. | Targeted at next-gen PoE++ systems; requires redesign of classification network and layout due to non-pin-compatible footprint. | Choose for future-proofing to 802.3bt or when >70W delivery is mandatory; not drop-in compatible. |
Compared with MAX5980ATG+T and LT4275AIMSE#PBF, the MAX5982AATE+T uniquely combines integrated 70W MOSFET, programmable LED driver, and dual-stage sleep (including ULP) in a single 5mm × 5mm TQFN - reducing component count, PCB area, and firmware complexity for Class 4/5 PoE-powered endpoints.
Availability
MAX5982AATE+T is available at Aetrix Electronics and suitable for IP phones, IP security cameras, and WiMAX base stations requiring stable component supply, extended temperature operation (-40°C to +125°C), and IEEE 802.3af/at compliance.
Supply support for MAX5982AATE+T 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, communications, automotive, and consumer markets since 1965.
The MAX5982AATE+T belongs to Analog Devices' PoE PD interface controller product line, engineered specifically for compact, thermally efficient, and standards-compliant powered devices in enterprise and outdoor networking equipment.
FAQ
What is the maximum input voltage the MAX5982AATE+T can withstand?
The MAX5982AATE+T has an absolute maximum input voltage rating of 100V across VDD to VSS, ensuring robustness against PoE transient surges and long-cable voltage drops. Its operational range is specified up to 60V, with UVLO thresholds at 35.4V (turn-on) and 31V (turn-off) to maintain stable power mode entry and exit under real-world Ethernet cabling conditions.
How does the MAX5982AATE+T support IEEE 802.3at Type 2 classification?
The MAX5982AATE+T implements full 2-event classification per IEEE 802.3at: it responds to the first PSE probe (12.6–20.5V) with programmed classification current (e.g., 36.4–43.6mA for Class 4), then sinks mark current (0.25–0.85mA) when VIN falls below 10.7V, and repeats the sequence. The latched 2EC output signals successful Type 2 detection to system firmware.
Does the MAX5982AATE+T include an integrated MOSFET, and what is its on-resistance?
Yes, the MAX5982AATE+T integrates a 70W n-channel isolation MOSFET with guaranteed RON of 0.1–0.25Ω across -40°C to +125°C. At +25°C, RON is typically 0.15Ω, enabling low conduction loss and minimal self-heating during full-load operation - eliminating the need for external high-power switches in most Class 4/5 PD designs.
Can the MAX5982AATE+T operate with both PoE and a wall adapter simultaneously?
No - the MAX5982AATE+T performs automatic priority-based switchover: when a wall adapter (>9V between WAD and RTN) is detected, it immediately disables the internal MOSFET, turns on the 2EC sink, and disconnects PoE power. The design assumes exclusive use of one source at a time, with seamless handoff managed entirely within the MAX5982AATE+T without external control logic.
What is the function of the SL, WK, and ULP pins on the MAX5982AATE+T?
SL (Pin 14) initiates sleep mode (6s low for MAX5982A); WK (Pin 15) wakes the device from sleep/ULP via falling edge; ULP (Pin 16) enables ultra-low-power sleep when asserted low alongside SL. Together, they provide hierarchical power management: normal sleep reduces system power via PG assertion, while ULP further cuts quiescent current while sustaining MPS for PSE recognition.
MAX5982AATE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Controller (PD)
- Number of Channels:
- 1
- Power - Max:
- -
- Internal Switch(s):
- Both
- Auxiliary Sense:
- Yes
- Standards:
- 802.3at (PoE+), 802.3af (PoE)
- Voltage - Supply:
- 60V
- Current - Supply:
- 250µA
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (5x5)
MAX5982AATE+T FAQ
1.How can I place an order for MAX5982AATE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5982AATE+T 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 MAX5982AATE+T reliable?
The price and inventory of MAX5982AATE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5982AATE+T is usually 5 days.
3.What payment methods are accepted for MAX5982AATE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5982AATE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5982AATE+T?
MAX5982AATE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5982AATE+T 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 MAX5982AATE+T?
For technical support, including MAX5982AATE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5982AATE+T requirements.
6.How does Aetrix verify that MAX5982AATE+T is sourced from the original manufacturer or authorized distributors?
All MAX5982AATE+T 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 MAX5982AATE+T meets industry standards.
7.What is the process for return or replacement of MAX5982AATE+T?
All MAX5982AATE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX5982AATE+T, 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 MAX5982AATE+T part is unused and in its original packaging.
Return procedure for MAX5982AATE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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