The LTC4155EUFD#PBF from Linear Technology is a versatile and advanced power management IC designed for dual-input USB and high voltage power path management with a full-featured battery charger for single-cell Li-Ion batteries. This sophisticated device is optimized to provide a seamless and efficient operation in portable devices that require charging and power management solutions.

Key Features

• Dual Input Power Path: The LTC4155 can manage power from two sources, typically a USB port and a higher voltage adapter. This allows for flexibility in charging and powering the system.
• High Efficiency: The device features an ideal diode controller to provide low loss power path management, ensuring that the system operates efficiently.
• Powerful Battery Charging: With up to 3.5A of charge current available, the LTC4155 can quickly charge a single-cell Li-Ion battery, making it ideal for high-power applications.
• Instant-On Operation: The LTC4155 is designed to power the system even with a deeply discharged battery, ensuring that the device can turn on without delay.
• Automatic Power Source Selection: The IC automatically selects the most suitable power source between the USB input and the external power supply.

Applications

The LTC4155EUFD#PBF is suited for a wide range of applications, particularly in the portable device market. It is an excellent choice for:

• Smartphones and Tablets
• Portable Medical Devices
• Handheld Instruments
• USB Power Banks
• Portable Industrial Equipment

Technical Specifications

The LTC4155 operates over a wide input voltage range and includes numerous features to ensure the safety and longevity of the battery, such as overvoltage protection, thermal regulation, and programmable charge termination. The device comes in a 24-lead QFN package and is designed to work in the industrial temperature range from -40°C to 85°C.

Conclusion

For designers looking for a robust and flexible power management solution, the LTC4155EUFD#PBF from Linear Technology offers the perfect blend of features and performance. Its dual-input capability, high-efficiency power path, and powerful charging options make it an indispensable component for the latest portable electronic devices.