Quad IEEE 802.3at Power Over Ethernet Controller The LTC4266IUHF#PBF is a Power over Ethernet (PoE) interface controller manufactured by Linear Technology (now part of Analog Devices).
### **Specifications:**
- **Manufacturer:** LINEAR (Linear Technology)
- **Package:** 38-Lead QFN (5mm x 7mm)
- **Operating Temperature Range:** -40°C to +85°C
- **Input Voltage Range:** 36V to 57V (IEEE 802.3af/at compliant)
- **Output Voltage:** Adjustable
- **Power Classification:** Supports IEEE 802.3af/at Type 1 and Type 2 PD classification
- **Integrated Switching Regulator:** Yes
- **Current Limit:** Programmable
- **Detection and Classification:** Compliant with IEEE 802.3af/at standards
- **Under-Voltage Lockout (UVLO):** Yes
- **Over-Temperature Protection:** Yes
### **Descriptions:**
The LTC4266IUHF#PBF is a single-port Power over Ethernet (PoE) interface controller designed for Powered Device (PD) applications. It integrates a switching regulator to efficiently convert the PoE input voltage to a lower regulated output voltage. The device supports IEEE 802.3af/at standards, providing detection, classification, and power management for PoE systems.
### **Features:**
- IEEE 802.3af/at compliant PD interface
- Integrated switching regulator with high efficiency
- Adjustable output voltage
- Programmable current limit
- Supports Type 1 (13W) and Type 2 (25.5W) power classification
- Under-voltage lockout (UVLO) protection
- Thermal shutdown protection
- Compact 38-lead QFN package
This information is based solely on the manufacturer's datasheet and specifications.
