LTC4155EUFD#PBF

LTC4155 is a 15 watt I²C controlled power manager with PowerPath™ instant-on operation, high efficiency switching battery charging and USB compatibility. Theis device seamlessly manages power distribution from two 5V sources, such as a USB port and a wall adapter, to a single-cell rechargeable lithium-ion/polymer battery and a system load. This device’s switching battery charger automatically limits its input current for USB compatibility, or may draw up to 3A from a high power wall adapter. The high efficiency step-down switching charger is designed to provide maximum power to the application and reduced heat in high power density applications. I²C adjustability of input current, charge current, battery float voltage, charge termination, and many other parameters allows maximum flexibility. It is used in application like tablet PCs, ultra mobile PCs, video media players, digital cameras, GPS, PDAs, smart phones, portable medical devices etc.

• Regulated battery charge current is 3.57A typ at (100.0% charge current mode, RPROG = 340 ohm)
• Monolithic switching regulator makes optimal use of limited power and thermal budget
• Dual-input overvoltage protection controller, USB on-the-go power delivery to the USB port
• Priority multiplexing for multiple inputs
• I²C/SMBus control and status feedback
• NTC thermistor ADC for temperature dependent charge algorithms (JEITA)
• Instant-on operation with low battery
• Battery ideal diode controller for power management
• Full featured Li-Ion/polymer battery charger with four float voltage settings
• Operating temperature is -40°C to 125°C, package style is 28-lead plastic QFN

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