DESCRIPTION
The LTC®4098-3.6 is a high efficiency USB PowerPath controller and full-featured LiFePO4battery charger. It seamlessly manages power distribution from multiple sources including USB, wall adapter, automotive, Firewire or other high voltage DC/DC converters, and a LiFePO4 battery.

FEATURES
■ Switching Regulator with Bat-TrackTM Adaptive Output Control Makes Optimal Use of Limited Power Available from USB Port to Charge Battery and Power Application
■ Charge Control Algorithm Specifically Designed for LiFePO4 (Lithium Iron Phosphate)
■ Overvoltage Protection Guards Against Damage
■ Bat-Track External Step-Down Switching Regulator Control Maximizes Efficiency from Automotive, Firewire and Other High Voltage Input Sources
■ 180mΩ Internal Ideal Diode Plus External Ideal Diode Controller Seamlessly Provide Low Loss PowerPathTM When Input Power Is Limited or Unavailable
■ Preset 3.6V Charge Voltage with 0.5% Accuracy
■ Instant-On Operation with Discharged Battery
■ 700mA Maximum Load Current from USB Port
■ 2A Maximum Input Current from Internal Switching Regulator
■ 1.5A Maximum Charge Current with Thermal Limiting
■ 20-Lead 3mm × 4mm × 0.75mm QFN Package

APPLICATIONS
■ High Peak Power Battery-Powered Equipment
■ Backup Applications
■ High Reliability Handhelds