LTC4098
Description
The LTC®4098/LTC4098-1 are high efficiency USB PowerPath controllers and full-featured Li-Ion/Polymer battery chargers. They seamlessly manage power distribution from multiple sources including USB, wall adapter, automotive, Firewire or other high voltage DC/DC converters, and a Li-Ion/Polymer battery.
Key Features
- Switching Regulator with Bat-Track™ Adaptive Output Control Makes Optimal Use of Limited Power Available from USB Port to Charge Battery and Power Application
- 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 PowerPath™ when Input Power is Limited or Unavailable
- Preset 4.2V Charge Voltage with 0.5% Accuracy (4.1V for LTC4098-1)
- 4.1V Float Voltage (LTC4098-1) Improves Battery Life and High Temperature Safety Margin
- Instant-On Operation with Discharged Battery
- 700mA Maximum Load Current from USB Port
- 1.5A Maximum Charge Current with Thermal Limiting
- 20-Lead 3mm × 4mm × 0.75mm QFN Package
