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Microchip Technology PD69101ILQ-13155TR
- Part No.:
- PD69101ILQ-13155TR
- Manufacturer:
- Microchip Technology
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
PD69101ILQ-13155TR.pdf
- Description:
- IC POE CNTRL 1 CHANNEL 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,340
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Product details
Overview
PD69101ILQ-13155TR from Microsemi is a single-port IEEE 802.3af/802.3at Power over Ethernet (PoE) Powered Device (PSE) controller IC used in Ethernet switches to deliver up to 36.25 W power and data over twisted-pair cabling. It integrates a 0.3 Ω main MOSFET, supports 2-pair and 4-pair feeding, operates from 44–57 VDC input, and provides real-time AF/AT classification, overload/short-circuit protection, and DC disconnect per IEEE standards.
For engineers reviewing the PD69101ILQ-13155TR datasheet, PD69101ILQ-13155TR pinout, PD69101ILQ-13155TR application, or PD69101ILQ-13155TR equivalent, this device enables robust PoE port management with dual LED status indication, configurable current limiting (425 mA AF / 722 mA AT), thermal shutdown at 200°C, and support for legacy/Cisco PD detection - critical for switch-level PSE design, industrial Ethernet infrastructure, and high-reliability network equipment.
Technical Context
The PD69101ILQ-13155TR implements a mixed-signal architecture with separate digital control logic (state machines for detection, classification, startup, and protection timing) and analog front-end circuitry (line detection generator, current sensing via 0.5 Ω external resistor, VMAIN monitoring, and thermal sensing). Its internal 8 MHz clock drives precise timing for IEEE-compliant two-event classification and dynamic load monitoring.
It executes full real-time PoE functions including AF/AT resistor-based detection, dual-finger AT classification, controlled soft-start (65 ms, ≤425 mA), and continuous port supervision using three current thresholds (Imin, Icut, Ilim) with dedicated timers (Tmin, Tcut, Tlim). The device supports master/slave synchronization for 4-pair operation via the SYNC pin and offers serial monitoring mode via LED0/LED1 pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IEEE Compliance | Fully compliant with IEEE 802.3af-2003 and 802.3at-2009 standards for detection, classification, power delivery, and disconnect. |
| Input Voltage Range | 44–57 VDC on V_MAIN pin - eliminates need for auxiliary supply; supports standard PoE midspan and endspan sources. |
| Max Output Power | 15.4 W (AF mode) or 36.25 W (AT mode) - enables Class 3 (AF) and Class 4 (AT) PD powering with margin. |
| Main FET RDS(on) | 0.3 Ω - minimizes conduction loss and self-heating during sustained 725 mA AT operation. |
| Thermal Protection | Junction shutdown at 200°C - protects against ambient overheating or sustained overload without external sensor. |
| Operating Temp | −40°C to +85°C ambient - qualified for industrial Ethernet switch environments. |
| Package | 24-pin QFN 4×5 mm, RoHS-compliant, exposed pad for thermal dissipation - supports high-density PCB layout. |
Pinout & Package
PD69101ILQ-13155TR is housed in a 24-pin plastic QFN package (4 mm × 5 mm, 0.5 mm pitch) with an exposed thermal pad connected to AGND. The package is RoHS-compliant, matte tin-finished, and rated MSL1 with 260°C peak reflow temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CURRENT_SET | Digital configuration input | Sets AF/AT mode and max current limit (e.g., 425 mA AF, 722 mA AT) via pull-up/down to DVDD/DGND. |
| AF/AT | Digital configuration input | Selects IEEE standard compliance path: "0" = AF only; "1" = AT capable with dual-finger classification. |
| PORT_SENSE | Analog current sense input | Connects to 0.5 Ω, 1% sense resistor to ground - enables precise port current measurement and overload detection. |
| LED0 / LED1 | Open-drain, active-low outputs | Drive status LEDs directly (3–5 mA sink); encode port state (ON/OFF/overload/VMAIN fault) and mode (AF/AT) per defined blink patterns. |
| RESET_N | Digital input | Active-low on/off command and hardware reset - allows remote port enable/disable without power cycle. |
| SYNC | Open-drain I/O | Coordinates timing between master/slave PD69101ICs in 4-pair applications - ensures synchronized detection, classification, and power-on events. |
Key Features
| Feature | Design Value |
|---|---|
| Two-event classification | Enables reliable IEEE 802.3at Class 4 identification using dual voltage levels - avoids misclassification in noisy environments. |
| Configurable legacy detection | When STD_DET/LEGACY = 0, detects Cisco pre-standard and capacitor-based PDs - extends compatibility beyond IEEE-compliant devices. |
| VMAIN out-of-range protection | Automatically disconnects port if V_MAIN exceeds 60 VDC - prevents damage from faulty upstream power sources. |
| Built-in 3.3 V and 5 V regulators | Generates DVDD (3.3 V) and VAUX5 (5 V) from V_MAIN - eliminates need for external LDOs and reduces BOM count. |
| Serial monitoring mode | Transmits real-time port voltage (VPORT), VMAIN, IPORT, and status registers via LED0/LED1 pins - enables non-invasive field diagnostics. |
Applications
| Enterprise Switch PSE Port | Industrial Ethernet Hub |
|---|---|
|
Use Scenario: A 24-port managed Ethernet switch delivers power to VoIP phones, wireless APs, and IP cameras via PoE. IC Role / Device Role / Timing Role: PD69101ILQ-13155TR acts as the per-port PSE controller, executing IEEE-compliant detection, classification, and power ramp-up within 65 ms. Use Value: Enables Class 4 (30 W) power delivery with automatic short-circuit shutdown (<75 ms) and thermal protection - ensuring system uptime and safety across all ports. |
Use Scenario: An outdoor-rated industrial hub powers ruggedized sensors and PLC I/O modules in factory automation networks. IC Role / Device Role / Timing Role: PD69101ILQ-13155TR manages 4-pair power feeding in master/slave configuration, synchronizing detection and startup across data+spare pairs. Use Value: Doubles available power (up to 36.25 W) while maintaining IEEE compliance - supports higher-power industrial edge devices without custom power architecture. |
| Legacy Network Upgrade | Smart Building Controller |
|
Use Scenario: Retrofitting legacy Cisco-powered surveillance cameras into a modern PoE infrastructure. IC Role / Device Role / Timing Role: PD69101ILQ-13155TR performs combined IEEE 802.3af/802.3at and Cisco pre-standard detection on the same port. Use Value: Eliminates need for separate legacy adapters - reduces cost and complexity when integrating older powered devices into new switches. |
Use Scenario: A centralized building management system powers lighting controllers, access readers, and HVAC actuators over structured cabling. IC Role / Device Role / Timing Role: PD69101ILQ-13155TR provides continuous port monitoring (VPORT, IPORT, status) via serial LED stream for real-time health reporting. Use Value: Delivers actionable telemetry without adding UART interfaces - simplifies firmware integration and enables predictive maintenance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PoE PSE controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX5984AETL+ | Single-port 802.3af/802.3at PSE controller with integrated 0.25 Ω FET; requires external 3.3 V supply (no internal regulator). | Lacks built-in 3.3 V/5 V regulators and serial monitoring mode; uses different LED signaling scheme. | Choose MAX5984AETL+ when board space permits external regulation and legacy LED status schemes are acceptable. |
| TPS23754PWPR | TI dual-port PSE controller with 0.35 Ω FET; supports 802.3af only (no AT mode); requires external microcontroller for classification sequencing. | Not IEEE 802.3at-compliant; lacks integrated AT classification logic and dual-finger detection capability. | Choose TPS23754PWPR only for cost-sensitive, AF-only applications where dual-port integration offsets added MCU overhead. |
Compared with MAX5984AETL+ and TPS23754PWPR, PD69101ILQ-13155TR delivers integrated AT classification, on-chip regulation, and diagnostic streaming - reducing external component count and enabling faster time-to-market for 802.3at-capable switch designs without sacrificing reliability or visibility.
Availability
PD69101ILQ-13155TR is available at Aetrix Electronics and suitable for enterprise networking equipment, industrial Ethernet infrastructure, smart building systems, and PoE switch development requiring stable component supply and long-term lifecycle support.
Supply support for PD69101ILQ-13155TR 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
Microsemi (now part of Microchip Technology) is a semiconductor company specializing in high-reliability analog, mixed-signal, and timing solutions for aerospace, defense, communications, and industrial markets.
PD69101ILQ-13155TR belongs to Microsemi's PoE PSE controller product line, designed specifically for IEEE 802.3af/at-compliant Ethernet switch ports requiring integrated power management, robust protection, and minimal external components.
FAQ
What is the maximum continuous output current supported by PD69101ILQ-13155TR in AT mode?
PD69101ILQ-13155TR supports a maximum continuous output current of 725 mA in IEEE 802.3at mode, corresponding to up to 36.25 W delivered power at 50 V. This value is confirmed in the Electrical Characteristics table under "Output Current Operating Range" for AT mode and aligns with its 0.3 Ω internal FET and 0.5 Ω external sense resistor design.
Does PD69101ILQ-13155TR support both 2-pair and 4-pair PoE configurations?
Yes, PD69101ILQ-13155TR supports both configurations. In 2-pair mode, it operates as a standalone PSE controller. In 4-pair mode, two PD69101ILQ-13155TR devices operate in master/slave configuration synchronized via the SYNC pin - enabling coordinated detection, classification, and power delivery across data and spare pairs as specified in IEEE 802.3at Annex D.
How does PD69101ILQ-13155TR handle legacy or Cisco pre-standard PD detection?
PD69101ILQ-13155TR enables legacy detection when the STD_DET/LEGACY pin is pulled low (DGND). In this mode, it performs capacitor-based detection in addition to IEEE resistor detection, supporting Cisco pre-standard PDs. This dual-detection capability is explicitly documented in the Theory of Operation section and pin description for pin 24.
What protection features are integrated into PD69101ILQ-13155TR?
PD69101ILQ-13155TR integrates over-current (via Icut/Ilim thresholds), over-temperature (200°C junction shutdown), VMAIN over-voltage (>60 VDC disconnect), short-circuit, and no-load (Imin <7.5 mA for >322 ms) protection. All protections execute autonomously without host intervention, as verified in the Dynamic Characteristics and Protection sections of the datasheet.
Can PD69101ILQ-13155TR be used without external sense resistors?
No - PD69101ILQ-13155TR requires an external 0.5 Ω, 1% sense resistor connected between PORT_SENSE and AGND to enable accurate current measurement, overload detection, and power limiting. The datasheet specifies this configuration in the Pin Description (pin 10) and Power Dissipation Information sections, and omitting it disables core protection functionality.
PD69101ILQ-13155TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Controller (PSE)
- Number of Channels:
- 1
- Power - Max:
- -
- Internal Switch(s):
- Yes
- Auxiliary Sense:
- -
- Standards:
- 802.3at (PoE+), 802.3af (PoE)
- Voltage - Supply:
- 44V ~ 57V
- Current - Supply:
- 10mA
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (4x5)
PD69101ILQ-13155TR FAQ
1.How can I place an order for PD69101ILQ-13155TR through Aetrix?
Please submit a Request for Quotation (RFQ) for PD69101ILQ-13155TR 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 PD69101ILQ-13155TR reliable?
The price and inventory of PD69101ILQ-13155TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PD69101ILQ-13155TR is usually 5 days.
3.What payment methods are accepted for PD69101ILQ-13155TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PD69101ILQ-13155TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PD69101ILQ-13155TR?
PD69101ILQ-13155TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PD69101ILQ-13155TR 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 PD69101ILQ-13155TR?
For technical support, including PD69101ILQ-13155TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PD69101ILQ-13155TR requirements.
6.How does Aetrix verify that PD69101ILQ-13155TR is sourced from the original manufacturer or authorized distributors?
All PD69101ILQ-13155TR 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 PD69101ILQ-13155TR meets industry standards.
7.What is the process for return or replacement of PD69101ILQ-13155TR?
All PD69101ILQ-13155TR units undergo pre-shipment inspection (PSI). If there is an issue with PD69101ILQ-13155TR, 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 PD69101ILQ-13155TR part is unused and in its original packaging.
Return procedure for PD69101ILQ-13155TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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