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MAX5921AESA+

MAX5921AESA+ Description

The MAX5921AESA+ from Analog Devices Inc./Maxim Integrated is a single-channel hot swap controller designed for -48V power distribution systems. Packaged in an 8-pin SOIC and compliant with ROHS3 and REACH standards, this surface-mount device ensures safe insertion and removal of boards in live backplanes. It features programmable current limit, overvoltage protection (OVP), and undervoltage lockout (UVLO), making it ideal for telecom, networking, and industrial applications. With a 700 µA supply current and MSL 1 (Unlimited) moisture sensitivity, it offers reliability in harsh environments.

MAX5921AESA+ Features

• Auto Retry & Fault Timeout: Automatically restarts after fault conditions, reducing manual intervention.
• Thermal Limit Protection: Prevents overheating by shutting down during excessive power dissipation.
• Programmable Circuit Breaker: Adjustable current limit (via external resistor) for flexible design integration.
• OVP/UVLO: Safeguards against voltage spikes and drops, ensuring stable operation.
• Low Supply Current (700 µA): Minimizes power overhead in energy-sensitive systems.
• No Internal Switch: Allows use with external MOSFETs for higher current handling.

MAX5921AESA+ Applications

• Telecom Equipment: Protects -48V line cards and base stations from inrush currents.
• Network Switches/Routers: Ensures safe hot-plugging in PoE (Power over Ethernet) systems.
• Industrial Power Systems: Secures modular power supplies and backplanes in automation setups.
• Server/Data Center PSUs: Mitigates risks during board replacement in high-availability environments.

Conclusion of MAX5921AESA+

The MAX5921AESA+ stands out for its robust protection features, low power consumption, and flexibility in -48V applications. Its programmable fault management and thermal limits make it superior to basic hot swap controllers, while the absence of an internal switch allows scalability. Ideal for mission-critical systems, it combines reliability with ease of integration, making it a top choice for engineers designing fault-tolerant power architectures.