LTC4066 - USB Power Manager with Low-Loss Ideal Diode and Li-Ion Battery Charger

Features
  • Seamless Transition Between Input Power Sources: Li-Ion Battery, USB and 5V Wall Adapter
  • Low Loss (50mΩ) Ideal Diode Path from BAT to OUT
  • Programmable Charge Current Detection (CHRG)
  • Load Dependent Charging Guarantees USB Input Current Compliance
  • Analog Gas Gauge Function
  • Charges Single Cell Li-Ion Batteries Directly from USB Port
  • Constant-Current/Constant-Voltage Operation with Thermal Feedback to Maximize Charging Rate Without Risk of Overheating*
  • Selectable 100% or 20% Current Limit (e.g., 500mA/100mA)
  • Termination Timer Adapts to Actual Charge Current
  • Preset 4.2V Charge Voltage with 0.8% Accuracy (4.1V for LTC4066-1)
  • NTC Thermistor Input for Temperature Qualified Charging
  • Thin Profile (0.75mm) 24-Lead 4mm x 4mm QFN Package
  • Ultrathin Profile (0.55mm) 24-Lead 4mm x 4mm UTQFN Package (LTC4066 Only)
Typical Application

Applications
  • Portable USB Devices
  • GPS, Cameras, Broadband Wireless Modems
  • Mulitple Input Chargers
Packaging

Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC4066EPF#PBF4x4 UTQFN-24E$3.36$2.35
LTC4066EPF#TRPBF4x4 UTQFN-24E$2.41
LTC4066EUF-1#PBF4x4 QFN-24E$3.29$2.30
LTC4066EUF-1#TRPBF4x4 QFN-24E$2.40
LTC4066EUF#PBF4x4 QFN-24E$3.29$2.30
LTC4066EUF#TRPBF4x4 QFN-24E$2.40
Demo Boards
Part NumberDescriptionPrice
DC848ALTC4066EUF | USB Power Manager and Li-Ion Charger$150.00
Datasheet
Reliability Data
Product Selector Card
Related Product
LTC4066/LTC4066-1 - USB Power Manager with Low-Loss Ideal Diode and Li-Ion Battery Charger
LTC4066 Package Drawing LTC4066
R540 - Reliability Data
I2C Battery Gas Gauges
LTC4066 Footprints and Symbols