LT4276BIUFD#PBF
POE IC, PD Controller, Forward/Flyback, 40 V Input, 300 kHz, 25.5 W, -40 to 85 °C, QFN-EP-28
| Manufacturer | ANALOG DEVICES |
|---|---|
| Manufacturer Part No | LT4276BIUFD#PBFCopy |
| Manufacturer Standard Lead Time | 26 weeks |
| Order Code | 4026145 |
| Your Part Number | |
| Technical Datasheet |
Need more?
| Quantity | Price (inc GST) |
|---|---|
| 1+ | S$9.070 (S$9.8863) |
| 10+ | S$6.970 (S$7.5973) |
| 73+ | S$5.980 (S$6.5182) |
| 146+ | S$5.750 (S$6.2675) |
| 292+ | S$5.560 (S$6.0604) |
| 511+ | S$5.420 (S$5.9078) |
Product Information
| Manufacturer | ANALOG DEVICES |
|---|---|
| Manufacturer Part No | LT4276BIUFD#PBFCopy |
| Manufacturer Standard Lead Time | 26 weeks |
| Order Code | 4026145 |
| Technical Datasheet | |
| PoE Standard | IEEE 802.3af, 802.3at, LTPoE++ |
| PoE Controller Type | PD Controller |
| Input Voltage | 40V |
| Output Current Max | - |
| UVLO | - |
| IC Case / Package | QFN-EP |
| No. of Pins | 28Pins |
| No. of Channels | 1Channels |
| Power Max | 25.5W |
| Duty Cycle (%) | 66% |
| Switching Frequency Max | 320kHz |
| IC Mounting | Surface Mount |
| Operating Temperature Min | -40°C |
| Operating Temperature Max | 85°C |
| Product Range | - |
| MSL | MSL 1 - Unlimited |
| SVHC | No SVHC (04-Feb-2026) |
| Controller IC Case Style | QFN-EP |
| Frequency | 300kHz |
| Output Current | - |
Product Overview
LT4276 is a pin-for-pin compatible family of IEEE802.3 and LTPoE++ powered device (PD) controller. It includes an isolated switching regulator controller capable of synchronous operation in both forward and flyback topologies with auxiliary power support. This device supports both forward and flyback power supply topologies, configurable for a wide range of PoE applications. The flyback topology supports No-Opto feedback. Auxiliary input voltage can be accurately sensed with just a resistor divider connected to the AUX pin. This device utilizes an external, low RDS(ON) N-channel MOSFET for the Hot Swap function, maximizing power delivery and efficiency, reducing heat dissipation, and easing the thermal design. It is widely used in application such as high power wireless data systems, outdoor security camera equipment, commercial and public information displays, high temperature applications etc.
- Auxiliary power support as low as 9V
- No opto-isolator required for flyback operation
- External Hot Swap™ N-channel MOSFET for lowest power dissipation and highest system efficiency
- <gt/>94% end-to-end efficiency with LT4321 ideal bridge
- LTPoE++ 38.7W, 52.7W, 70W and 90W
- IEEE 802.3at 25.5W compliant
- IEEE 802.3af upto 13W compliant
- Operating temperature is -40°C to 85°C, IEEE 802.3at/af compliant
- Packaging style is 28-lead plastic QFN
Notes
ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party
Technical Specifications
| PoE Standard | IEEE 802.3af, 802.3at, LTPoE++ |
|---|---|
| Input Voltage | 40V |
| UVLO | - |
| No. of Pins | 28Pins |
| Power Max | 25.5W |
| Switching Frequency Max | 320kHz |
| Operating Temperature Min | -40°C |
| Product Range | - |
| SVHC | No SVHC (04-Feb-2026) |
| Frequency | 300kHz |
| PoE Controller Type | PD Controller |
|---|---|
| Output Current Max | - |
| IC Case / Package | QFN-EP |
| No. of Channels | 1Channels |
| Duty Cycle (%) | 66% |
| IC Mounting | Surface Mount |
| Operating Temperature Max | 85°C |
| MSL | MSL 1 - Unlimited |
| Controller IC Case Style | QFN-EP |
| Output Current | - |
Technical Docs (1)
Legislation and Environmental
| Country of Origin: Country in which last significant manufacturing process was carried outCountry of Origin: | Philippines Country in which last significant manufacturing process was carried out |
|---|---|
| Tariff No: | 85423990 |
| US ECCN: | EAR99 |
| EU ECCN: | NLR |
| RoHS Compliant: | Yes RoHS |
| RoHS Phthalates Compliant: | Yes RoHS |
| SVHC: | No SVHC (04-Feb-2026) |
| Download Product Compliance Certificate | Product Compliance Certificate |
| Weight (kg): | .000001 |