PD69101ILQ-TR - 1-Port PoE+ PSE Controller 802.3at | Microchip
MPN: PD69101ILQ-TR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.56 | $3.56 |
| 10 | $3.21 | $32.10 |
| 100 | $2.89 | $289.00 |
| 500 | $2.61 | $1,305.00 |
| 1,000 | $2.35 | $2,350.00 |
PD69101ILQ-TR Overview
A PoE PSE (Power Sourcing Equipment) controller is a power management IC that lives inside Ethernet switches, injectors, and midspans. It governs how power is safely delivered over the same Cat-5/Cat-6 cable that carries data: it detects whether a connected Powered Device (PD) is genuinely PoE-compliant, classifies its power draw, monitors current and voltage, and disconnects power safely when a device is removed. This prevents damage to legacy non-PoE equipment and ensures the Ethernet port never exceeds negotiated power budgets.
The PD69101 provides detection of IEEE 802.3af-2003 compliant PDs and IEEE 802.3at high-power devices, ensuring safe power feeding and disconnection per the standard. Its mixed-signal architecture integrates the precision analog detection and classification circuitry with a management interface, and the MODE0/MODE1 configuration pins support a serial monitoring mode in which the device continuously transmits the content of nine internal registers for system health diagnostics. LED I/O pins support port-status indication.
Typical applications include Ethernet switch ports, PoE midspan injectors, security camera and wireless access point infrastructure, and industrial network equipment where the industrial-grade temperature rating is required.
Designers should budget port power dissipation: at a 30 W PoE+ port the datasheet example shows about 180 mW in the sense element and 108 mW in the external MOSFET at 600 mA, so an appropriate low-Rds(on) external pass MOSFET and sense resistor are key to thermal margin. The QFN-24 exposed pad must be soldered to a grounded copper pour for heat spreading.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet, with pricing as of 2026-10-19.
Drop-in alternatives for PD69101ILQ-TR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PD69104ILQ-TR
✅ Drop-In📋 Reference alternative (not in catalog)
PD69108ILQ-TR
✅ Drop-In📋 Reference alternative (not in catalog)
PD69101ILQ
✅ Drop-In📋 Reference alternative (not in catalog)
PD69101ILQ-TR Maximum Ratings & Electrical Characteristics
| Product Type | PoE PSE Controller + Manager, 1-Port |
| PoE Standards Supported | IEEE 802.3af (PoE), IEEE 802.3at (PoE+) |
| Number of Ports | 1 Channel |
| Maximum Port Power (PoE+) | 30 W |
| Architecture | Mixed-signal, high-voltage PoE driver |
| PD Detection | IEEE 802.3af-2003 compliant PD detection and IEEE 802.3at high-power detection |
| Configuration Interface | MODE0/MODE1 pins, serial monitoring mode (9 internal registers) |
| LED Indication | High-voltage open-drain LED I/O pins (active low, sink) |
| Temperature Grade | Industrial |
| Package | 24-QFN (4x5 mm), VFQFN Exposed Pad |
| Mounting Type | Surface Mount |
| External Pass Element | External MOSFET + sense resistor (example: 108 mW Rds_ON loss at 600 mA) |
| Typical Port Power Dissipation | Psense = 180 mW at 600 mA (30 W PoE+ example, per datasheet) |
| Packaging | Tape and Reel (-TR suffix) |
PD69101ILQ-TR 24-qfn (4x5 mm), vfqfn exposed pad Pin Configuration Guide
Pin configuration for PD69101ILQ-TR (24-qfn (4x5 mm), vfqfn exposed pad package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for PD69101ILQ-TR.
Refer to the datasheet for full pin configuration.
Typical Applications
PD69101ILQ-TR is suitable for 6 applications: PoE Ethernet Switch Ports, PoE Midspan Injectors, IP Surveillance Camera Infrastructure, Wireless Access Point Powering, Industrial Network Equipment, Building Automation and Lighting Control.
PoE Ethernet Switch Ports
The primary use of the PD69101ILQ-TR is as the per-port PSE controller inside Ethernet switches, where the Microchip product page notes it 'is utilized in Ethernet switches and enables network devices to share power and data over the same cable.' Its single-port architecture lets switch designers instantiate one controller per powered port, scaling cleanly from 4-port edge switches to higher densities. The controller performs IEEE 802.3af-2003 detection and 802.3at classification so the switch never delivers power to non-PoE equipment, and its serial monitoring mode (MODE0/MODE1 = 01) streams nine internal registers continuously, giving the switch CPU real-time per-port health telemetry without polling overhead. Design the external MOSFET and sense resistor per the datasheet 30 W / 600 mA example to keep port dissipation near 300 mW total.
Recommended
PoE Midspan Injectors
Midspan injectors add power to an existing data-only Ethernet link, and the PD69101ILQ-TR fits this role because it needs only the power-pair path while data passes untouched. In a midspan, the controller performs detection and classification on the spare pairs before closing the pass MOSFET, exactly the safe power feeding and disconnection behavior the Microchip datasheet describes. Because midspans are often deployed in uncontrolled environments (wiring closets, outdoor camera drops), the industrial temperature grade of the -ILQ variant adds margin. The 802.3at 30 W capability supports Class 4 loads such as PTZ cameras and dual-radio access points. Thermal design centers on the external pass MOSFET: at the datasheet example of 600 mA port current, Rds(on) losses are about 108 mW, so a low-Rds(on) FET with adequate copper pour keeps the compact midspan enclosure within limits.
Recommended
IP Surveillance Camera Infrastructure
Security cameras are the largest single class of PoE powered devices, and the switches and midspans feeding them rely on PSE controllers like the PD69101ILQ-TR to guarantee that power is only applied after valid IEEE 802.3af/at detection. The controller's classification output lets the switch budget power accurately across many camera ports - a PTZ camera pulling Class 4 (25.5 W at the PD) requires full 802.3at support, which the PD69101 provides with its 30 W port example. Safe disconnection is equally critical in surveillance: when a camera is swapped in the field, the controller ensures the cable is de-energized before re-detection, preventing arcing and damage. The industrial temperature rating supports outdoor NVR cabinets and pole-mounted switch enclosures exposed to wide ambient swings.
Recommended
Wireless Access Point Powering
802.11ac/ax wireless access points typically draw 15 to 30 W, falling squarely in the IEEE 802.3at regime that the PD69101ILQ-TR manages on the sourcing side. Enterprise switches powering ceiling-mounted APs use this controller to detect and classify each AP, negotiate PoE+ class, and continuously monitor port current. The serial monitoring mode - which per the August 2019 datasheet repeatedly streams nine internal registers when MODE0/MODE1 are strapped to 01 - enables the switch management firmware to log per-port consumption and detect failing or tampered AP connections. Since AP deployments run 24/7 for years in plenum ceilings and rooftop enclosures, the industrial temperature grade and QFN exposed-pad thermal design of the PD69101ILQ-TR contribute to long-term reliability of the powering infrastructure.
Recommended
Industrial Network Equipment
Factory-floor Ethernet infrastructure - industrial switches, protocol gateways, and machine-vision network nodes - operates over extended temperatures and noisy electrical environments. The PD69101ILQ-TR's industrial temperature grade ('ILQ' ordering code per digchip: 'IEEE 802.3at single port PoE PSE controller + manager, industrial temp') targets exactly these installations. Its mixed-signal, high-voltage process integrates the detection and classification front ends, reducing external precision-component count on industrial boards where component screening cost matters. Safe power feeding and disconnection per the Microchip datasheet protects expensive PLCs and drives connected on the same network as powered endpoints. Designers should follow the datasheet's 30 W example sense-resistor sizing (about 180 mW at 600 mA) and provide robust ground pour under the exposed pad to withstand industrial vibration and thermal cycling.
Recommended
Building Automation and Lighting Control
PoE is increasingly used to power LED luminaires, occupancy sensors, and room controllers in smart buildings, with each network drop managed by a PSE controller. The PD69101ILQ-TR's support for both 802.3af (15.4 W) and 802.3at (30 W) classes lets a single switch design power everything from sensor nodes (Class 0-2) to lighting fixtures (Class 4). Its detection stage prevents energizing cable runs to legacy analog devices sharing the same structured cabling, and the open-drain LED status pins (pins 13-14 in 2-pair applications per the datasheet) give front-panel or rack-level port-status indication that facility technicians rely on during commissioning. The serial monitoring mode streams register contents for building-management-system integration, allowing energy-per-port metering without additional sense circuitry.
Recommended
Recommended Products Summary
Engineering reference data for PD69101ILQ-TR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PD69104ILQ-TR | PD69108ILQ-TR | PD69101ILQ |
|---|---|---|---|---|
| Package | 24-QFN (4x5 mm) Exposed Pad | 24-QFN (4x5 mm) Exposed Pad - same | 24-QFN (4x5 mm) Exposed Pad - same | 24-QFN (4x5 mm) Exposed Pad - same |
| Brand | Microchip Technology (formerly Microsemi) | Microchip Technology | Microchip Technology | Microchip Technology |
| Temperature Grade | Industrial | Industrial | Industrial | Industrial |
| Packaging | Tape & Reel (-TR) | Tape & Reel | Tape & Reel | Tray/Tube (non-TR) |
Key Differentiators
- Industrial temperature grade in a compact single-port package (vs PD69101ILQ (same die, non-TR packaging))
- Continuous serial monitoring of nine internal registers (vs PD69108ILQ-TR)
- Dual-standard 802.3af + 802.3at support up to 30 W (vs Legacy 802.3af-only PSE controllers)
Design Notes
The PD69101 is a controller; port thermal design is dominated by the external pass MOSFET and sense resistor. Estimated from the datasheet example: at a 30 W PoE+ port and 600 mA port current, the sense element dissipates about 180 mW and the MOSFET Rds(on) loss about 108 mW. Select a MOSFET whose Rds(on) keeps losses below roughly 150 mW at maximum port current, and solder the QFN-24 exposed pad to a grounded copper pour of at least a few square centimeters so controller losses have a low-impedance heat path.
Do not treat same-family parts as automatic substitutes. The PD69104 and PD69108 share the PD6910x family footprint, but per ETEI's comparisons their feature configuration, series definition, and potentially mode-pin behavior differ from the PD69101. Before a second-source swap, diff the detection/classification thresholds, the MODE0/MODE1 strap table (including the serial monitoring code 01), and LED pin behavior (high-voltage open-drain, active-low sink on pins 13/14 in 2-pair applications) across both datasheets, then re-run 802.3at compliance detection tests on real PDs.
Layout the power path (input supply, pass MOSFET, sense resistor, port transformer center tap) with short, wide traces rated for the full port current, keeping the sense resistor kelvin-connected to the controller's sense inputs to preserve detection accuracy - millivolt-level detection thresholds are easily corrupted by parasitic trace drops. Keep the MODE0/MODE1 strap resistors close to the device and away from the high-voltage port switching nodes to prevent false mode reads during hot-plug transients.
If the serial monitoring mode is used, remember that when MODE0/MODE1 = 01 the PD69101 continuously and repeatedly transmits nine internal registers. Budget host-side receive handling for this continuous stream, and ensure the monitoring output trace is routed away from the PoE port high-voltage switching loop to avoid corrupting the serial data during MOSFET turn-on/turn-off events. Add local decoupling on the controller supply per the datasheet typical application schematic.
Compliance Information
The retrieved web data includes ETEI comparison pages referencing RoHS and REACH status but does not state explicit values for this ordering code. Verify compliance on the Microchip product page before regulated production use.
