Product Overview: LTC4155IUFD#PBF

The LTC4155IUFD#PBF from Linear Technology is a high-efficiency, dual-input PowerPath™ manager with an integrated Li-Ion/Polymer battery charger. It is designed to provide seamless transition between multiple power sources, such as a wall adapter and USB, while efficiently charging the battery and supplying power to the load.

Key Features

• Advanced PowerPath Management: The LTC4155 automatically controls the direction of power flow, ensuring that the system operates uninterruptedly when external power sources are connected or disconnected.
• Dual Input Power Sources: It accepts two input power sources with a priority channel selection, allowing for a prioritized choice between sources such as a USB port and a wall adapter.
• Integrated Battery Charger: The device includes a high-efficiency switch-mode battery charger with programmable charge current up to 2A, which can charge a single-cell Li-Ion/Polymer battery.
• Instant-On Operation: With its Instant-On feature, the LTC4155 ensures that system power is available immediately upon plugging into an external power source, even with a deeply discharged battery.
• Thermal Regulation: To protect the battery and the charger during high power or high ambient conditions, the LTC4155 employs thermal regulation to maximize the charge rate without the risk of overheating.
• Ideal Diode Control: The LTC4155 features low loss ideal diode control to provide a low voltage drop and power loss, which is particularly beneficial in portable applications.

Applications

The LTC4155IUFD#PBF is suitable for a wide range of applications that require efficient power management and battery charging. This includes portable medical devices, industrial handhelds, point-of-sale devices, and personal navigation devices.

Product Specifications

• Part Number: LTC4155IUFD#PBF
• Manufacturer: Linear Technology
• Package: 24-pin QFN (4mm × 5mm)
• Operating Temperature Range: -40°C to +85°C

The LTC4155IUFD#PBF is a versatile power management solution that optimizes system uptime and battery life for handheld and portable devices, making it an essential component for designers looking to create robust and efficient power systems.