Positive High-Voltage, Hot-Swap Controllers The MAX5933BESA is a power-over-Ethernet (PoE) interface controller manufactured by Maxim Integrated (now part of Analog Devices).
### **Specifications:**
- **Input Voltage Range:** 36V to 57V (compliant with IEEE 802.3af standard)
- **Output Voltage:** Adjustable via external components
- **Operating Temperature Range:** -40°C to +85°C
- **Package:** 8-pin SOIC
- **Detection and Classification:** Supports IEEE 802.3af-compliant PD detection and classification
- **Power Dissipation:** Low power dissipation in operation
- **Integrated Power MOSFET:** Built-in N-channel MOSFET for switching
- **Under-Voltage Lockout (UVLO):** Ensures proper operation within voltage limits
- **Thermal Shutdown Protection:** Prevents overheating
### **Descriptions:**
The MAX5933BESA is designed for Power-over-Ethernet (PoE) applications, providing a complete interface for powered devices (PDs). It integrates detection, classification, and a switching regulator controller to efficiently manage power delivery from a PoE-compliant power sourcing equipment (PSE).
### **Features:**
- **IEEE 802.3af Compliance:** Ensures compatibility with PoE standards
- **Programmable Inrush Current Limit:** Protects against excessive current during startup
- **Low Standby Power Consumption:** Minimizes power loss when inactive
- **Integrated PWM Controller:** Supports DC-DC converter operation
- **Open-Drain Power Good (PG) Output:** Indicates valid input voltage
- **Robust Protection:** Includes thermal shutdown and UVLO for safe operation
This device is commonly used in VoIP phones, wireless access points, and other PoE-powered equipment.
