**LTC3350EUHF#PBF: A High-Current Supercapacitor Backup Controller and System Monitor**

In the realm of mission-critical systems, where uninterrupted power is non-negotiable, the **LTC3350EUHF#PBF** from Analog Devices stands out as a highly integrated solution for robust backup power management. This monolithic supercapacitor charger and backup controller is engineered to provide **high-current charging and system backup** for a wide array of applications, including solid-state drives (SSDs), industrial computers, and communication infrastructure.

The core strength of the LTC3350 lies in its ability to manage a bank of supercapacitors efficiently. It can deliver an impressive **programmable charge current of up to 2.5A**, enabling rapid charging of supercapacitors to a user-adjustable output voltage. This is crucial for minimizing the recharge time between potential power loss events. The device incorporates a **synchronous step-down DC/DC controller** to achieve high-efficiency charging from a wide input voltage range of 4.5V to 35V, making it adaptable to various rail voltages.

Beyond just charging, the LTC3350 excels as a complete system monitor. It provides **comprehensive system health monitoring** through its I²C interface. Key parameters such as input voltage, output voltage, supercapacitor voltage, and charge current can be monitored in real-time. Furthermore, it features built-in protection against overvoltage, overcurrent, and overtemperature conditions, ensuring the safety and longevity of both the controller and the supercapacitor bank.

When a primary power failure is detected, the LTC3350 seamlessly switches to backup mode. It utilizes an internal **boost converter to maintain a stable output voltage** from the decaying supercapacitor voltage, ensuring the connected load continues to operate without interruption. This smooth and automatic failover is essential for allowing systems to complete critical shut-down procedures or maintain operation until primary power is restored.

The device is housed in a compact 38-lead QFN (5mm x 7mm) package, offering a powerful feature set in a minimal board space. Its high level of integration reduces the need for numerous external components, simplifying design and improving overall system reliability.

**ICGOOODFIND**

The LTC3350EUHF#PBF is an indispensable component for designers seeking a reliable, high-performance, and integrated solution for supercapacitor-based backup power. Its combination of high-current charging, extensive system monitoring, and robust protection features makes it a top-tier choice for ensuring data integrity and operational continuity in the face of power instability.

**Keywords:**

Supercapacitor Backup

High-Current Charging

System Monitor

Power Fail Protection

I²C Interface