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Analog Devices Inc. LTC4296AUK-1#PBF
- Part No.:
- LTC4296AUK-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LTC4296AUK-1#PBF.pdf
- Description:
- POWER-OVER-DATA_LINES PSE CONTRO
- Quantity:
- Payment:
- Shipping:
Inventory:102
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Product details
Overview
LTC4296AUK-1#PBF from Analog Devices is an IEEE 802.3cg-compliant, five-port single-pair Power over Ethernet (SPoE) power sourcing equipment (PSE) controller. It delivers up to 54 V power via external high-side N-channel MOSFETs, supports per-port voltage/current/temperature telemetry via SPI with PEC, and operates across 6 V–60 V input supply range - enabling robust field-deployed OT and industrial automation systems.
For engineers reviewing the LTC4296AUK-1#PBF datasheet, LTC4296AUK-1#PBF pinout, LTC4296AUK-1#PBF application, or LTC4296AUK-1#PBF equivalent, key selection considerations include SPoE port count, 52 µA sleep-state supply current, high-side foldback current-limit threshold (177–193 mV), support for SCCP-based PD classification, and compatibility with 10BASE-T1L transceivers such as ADIN1100 and ADIN2111.
Technical Context
The LTC4296AUK-1#PBF implements autonomous or microcontroller-assisted SPoE PSE operation using dual-stage circuit breakers: high-side analog foldback current limit (ACL) with programmable threshold and low-side forward/reverse fault detection. Its SPI interface with packet error code (PEC) ensures reliable host communication for real-time port status, telemetry, and configuration.
It integrates dedicated gate drivers (HGATEx, LGATE), Kelvin-sense inputs (HSNSPx/HSNSMx, LSNSx), and wake-up forwarding via bidirectional WAKEUP pin. The device supports IEEE 802.3cg MFVS signature verification, PD-initiated sleep/wake-up, and deep-sleep return-path fault protection - all within a single 48-lead QFN package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IEEE Compliance | IEEE 802.3cg SPoE PSE controller - enables interoperability with 24 V/54 V powered devices on single-pair cables. |
| Port Count | 5 independent SPoE ports - supports simultaneous powering of multiple field instruments or sensors in distributed OT systems. |
| Input Supply Range | 6 V to 60 V - accommodates wide-range industrial DC supplies and battery-backed systems without external regulation. |
| Sleep-State Current | 52 µA typical - minimizes standby power in always-on building automation or traffic control nodes. |
| High-Side Foldback Threshold | 177–193 mV (VIN − VOUTPx < 12 V) - sets precise inrush and short-circuit protection for external N-MOSFETs. |
| SPI Interface | With PEC - provides error-checked command/response communication for telemetry, diagnostics, and firmware-controlled classification. |
| Package | 48-lead, 7 mm × 7 mm QFN - enables compact, thermally efficient PCB layout for space-constrained edge controllers. |
Pinout & Package
The LTC4296AUK-1#PBF is housed in a 48-lead, 7 mm × 7 mm QFN package with exposed pad (pin 49) requiring soldering to PCB ground for thermal and electrical integrity. Pin functions are validated per Analog Devices Rev. A datasheet Figure 3 and Table 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUTPx (pins 1,33,37,41,45) | Port x positive output | Connects to source of external high-side N-MOSFET - defines power path polarity and enables Kelvin sensing via HSNSPx/HSNSMx. |
| HGATEx (pins 2,34,38,42,46) | Port x high-side gate drive | Drives gate of external N-MOSFET with 10.2 V typical swing and 72 mA fast pull-down - ensures rapid turn-off during fault conditions. |
| HSNSPx / HSNSMx (pins 4,3,36,35,40,39,44,43,48,47) | High-side Kelvin sense inputs | Enable accurate current measurement across external sense resistor - critical for foldback ACL and power-good validation. |
| LSNSx (pins 26,28,31) | Low-side sense negative input | Supports optional low-side circuit breaker for reverse fault and ground-fault protection in nonisolated applications. |
| WAKEUP (pin 14) | Bidirectional wake-up signal | Pulled high internally at 3.75 V during PD wake-up; accepts external logic-high assertion - enables multi-port wake coordination. |
| SDI/SDO/SCK/CS (pins 9–12) | SPI bus interface | Full-duplex serial control with PEC - allows host MCU to read port telemetry, configure thresholds, and manage state transitions. |
Key Features
| Feature | Design Value |
|---|---|
| IEEE 802.3cg SPoE compliance | Guarantees interoperability with certified PDs in 24 V/54 V systems - eliminates proprietary power coupling risks in field deployments. |
| Per-port telemetry | Voltage, current, and temperature monitoring via integrated 11-bit ADCs - enables predictive maintenance and real-time load profiling across all five ports. |
| Deep-sleep return-path protection | Detects forward/reverse faults and short circuits during sleep mode (e.g., −0.87 V RCB threshold) - prevents back-feed damage in unpowered segments. |
| SCCP support with microcontroller | Enables software-defined PD classification - essential for legacy or custom PDs not supporting physical layer detection. |
| Charge pump for high-side MOSFETs | Boosts HGATEx drive above VIN - allows use of low-RDS(ON) N-MOSFETs without level-shifting, reducing conduction loss and thermal stress. |
Applications
| Building Automation | Traffic Control Systems |
|---|---|
Use Scenario: Powering wireless sensor nodes, occupancy detectors, and HVAC actuators across large commercial facilities using single-pair cabling. IC Role / Device Role / Timing Role: SPoE PSE controller managing five concurrent 24 V/54 V power channels with telemetry and fault isolation. Use Value: Eliminates separate power wiring and reduces installation cost by >40% versus dual-cable solutions while maintaining IEEE-standard safety and interoperability. |
Use Scenario: Supplying power and data to intelligent streetlight controllers, vehicle detection sensors, and variable message signs along roadways. IC Role / Device Role / Timing Role: Five-port PSE delivering stable 54 V SPoE power with deep-sleep wake-up forwarding for synchronized node activation. Use Value: Enables remote firmware updates and energy-saving sleep modes without manual intervention - extending battery backup duration in off-grid installations. |
| Field Instrumentation | Security Systems |
Use Scenario: Powering loop-powered pressure transmitters, flow meters, and valve positioners in hazardous process environments. IC Role / Device Role / Timing Role: High-reliability PSE with foldback current limiting and MDI fault tolerance - ensuring safe operation under cable fault conditions. Use Value: Maintains continuous telemetry during transient overloads and prevents latch-up during sensor short circuits - improving system uptime in critical infrastructure. |
Use Scenario: Delivering power and data to IP cameras, door access readers, and perimeter motion sensors over existing coaxial or twisted-pair infrastructure. IC Role / Device Role / Timing Role: SPoE controller supporting MFVS signature verification and PD sleep/wake-up for low-power surveillance nodes. Use Value: Reduces total cost of ownership by consolidating power/data onto one cable - simplifying retrofitting into legacy security installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPoE PSE controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4296AUK-2#PBF | Same pinout and feature set, but configured for Class 14 power delivery (up to 71.3 W/port) vs. Class 10 (up to 51.4 W/port) for LTC4296AUK-1#PBF. | Required where higher per-port power is needed for active sensors or edge compute modules. | Select LTC4296AUK-2#PBF only when full Class 14 compliance and higher power budget are mandatory. |
| MAX5988BETX+ | Four-port SPoE PSE with integrated MOSFET drivers and 12-bit ADCs; lacks deep-sleep return-path protection and SCCP support. | Suitable for simpler, lower-channel-count systems where host MCU resources are constrained and telemetry depth is secondary. | Choose MAX5988BETX+ for cost-sensitive, four-port designs without need for wake-up forwarding or low-side fault detection. |
Compared with LTC4296AUK-1#PBF, the LTC4296AUK-2#PBF offers higher per-port power at identical footprint and control architecture, while the MAX5988BETX+ trades channel count and advanced protection features for integration density and reduced BOM count - making each suitable for distinct system-level trade-offs in industrial SPoE deployment.
Availability
LTC4296AUK-1#PBF is available at Aetrix Electronics and suitable for building automation, traffic control systems, and field instrumentation requiring stable component supply, long-term lifecycle assurance, and IEEE 802.3cg compliance.
Supply support for LTC4296AUK-1#PBF 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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision industrial, automotive, and communications applications.
The LTC4296AUK-1#PBF belongs to Analog Devices' SPoE PSE controller product line, designed specifically to enable scalable, standards-compliant single-pair Ethernet power delivery in operational technology and IIoT edge systems.
FAQ
What is the primary function of the LTC4296AUK-1#PBF in an SPoE system?
The LTC4296AUK-1#PBF serves as a five-port IEEE 802.3cg-compliant power sourcing equipment (PSE) controller. It manages power delivery, fault protection, and telemetry for up to five powered devices over single-pair Ethernet cables. The LTC4296AUK-1#PBF interfaces with external N-channel MOSFETs and sense resistors to implement high-side foldback current limiting, supports SPI-based host control with PEC, and enables PD sleep/wake-up coordination - making it central to robust, standards-based SPoE infrastructure.
Does the LTC4296AUK-1#PBF integrate power MOSFETs or require external ones?
The LTC4296AUK-1#PBF does not integrate power MOSFETs and requires external high-side N-channel MOSFETs for each port. It provides dedicated gate drivers (HGATEx) and Kelvin-sense inputs (HSNSPx/HSNSMx) to support low-RDS(ON) discrete FETs - minimizing conduction losses and enabling ruggedized designs. An optional low-side N-MOSFET can be added per port using LGATE and LSNSx pins for enhanced fault coverage.
How does the LTC4296AUK-1#PBF support PD classification and detection?
The LTC4296AUK-1#PBF supports both physical-layer detection (autonomous mode via AUTO pin) and serial communication classification protocol (SCCP) with an external microcontroller. It validates PD signatures using maintain full voltage signature (MFVS) and performs open-circuit, invalid signature, and short-circuit detection. Classification thresholds - including VBAD_HI_PSE (4.7–5.0 V) and VOC (5.05–5.5 V) - are hardware-defined and verified per IEEE 802.3cg requirements.
What telemetry capabilities does the LTC4296AUK-1#PBF provide per port?
The LTC4296AUK-1#PBF provides per-port voltage, current, and temperature telemetry via two integrated 11-bit ADC subsystems: a port-source current ADC (full-scale 204.8 mV, ±2.5% gain error) and a global ADC for VIN, VOUTPx−VOUTMx, and internal die temperature (0.25°C/LSB, ±5°C error). All telemetry is accessible through the SPI interface with PEC, enabling real-time health monitoring and dynamic power budgeting across all five ports.
Is the LTC4296AUK-1#PBF compatible with Analog Devices' 10BASE-T1L transceivers?
Yes, the LTC4296AUK-1#PBF is explicitly designed for seamless integration with Analog Devices' 10BASE-T1L transceiver portfolio, including the ADIN1100 (PHY), ADIN1110 (MAC-PHY), and ADIN2111 (2-port switch). Its SPoE timing, voltage ranges, and fault-handling behavior align with 10BASE-T1L data link requirements, and its SPI interface allows coordinated power/data handshaking - enabling complete single-pair Ethernet controller solutions for industrial edge nodes.
LTC4296AUK-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- Controller (PSE)
- Number of Channels:
- 5
- Power - Max:
- -
- Internal Switch(s):
- No
- Auxiliary Sense:
- No
- Standards:
- 802.3cg (PoE)
- Voltage - Supply:
- 6V ~ 60V
- Current - Supply:
- 80mA
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-QFN (7x7)
LTC4296AUK-1#PBF FAQ
1.How can I place an order for LTC4296AUK-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4296AUK-1#PBF 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 LTC4296AUK-1#PBF reliable?
The price and inventory of LTC4296AUK-1#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4296AUK-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC4296AUK-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4296AUK-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4296AUK-1#PBF?
LTC4296AUK-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4296AUK-1#PBF 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 LTC4296AUK-1#PBF?
For technical support, including LTC4296AUK-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4296AUK-1#PBF requirements.
6.How does Aetrix verify that LTC4296AUK-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC4296AUK-1#PBF 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 LTC4296AUK-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC4296AUK-1#PBF?
All LTC4296AUK-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4296AUK-1#PBF, 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 LTC4296AUK-1#PBF part is unused and in its original packaging.
Return procedure for LTC4296AUK-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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