High Efficiency, Multi-Chemistry Battery Charger with PowerPath Control Features: General Purpose Battery Charger Controller Efficient 550kHz Synchronous Buck PWM Topology ±0.5% Output Float Voltage Accuracy Programmable Charge Current: 4% Accuracy Programmable AC Adapter Current Limit: 3% Accuracy No Audible Noise with Ceramic Capacitors INFET Low Loss Ideal Diode PowerPath™ Control Wide Input Voltage Range: 6V to 28V Wide Output Voltage Range: 2V to 28V Indicator Outputs for AC Adapter Present, Charging, C/10 Current Detection and Input Current Limiting Analog Charge Current Monitor Micropower Shutdown 20-Pin 4mm × 4mm × 0.75mm QFN Package

High Efficiency, Multi-Chemistry Battery Charger with PowerPath Control Features: General Purpose Battery Charger Controller Efficient 550kHz Synchronous Buck PWM Topology ±0.5% Output Float Voltage Accuracy Programmable Charge Current: 4% Accuracy Programmable AC Adapter Current Limit: 3% Accuracy No Audible Noise with Ceramic Capacitors INFET Low Loss Ideal Diode PowerPath™ Control Wide Input Voltage Range: 6V to 28V Wide Output Voltage Range: 2V to 28V Indicator Outputs for Charging, C/10 Current Detection and Input Current Limiting Analog Charge Current Monitor Micropower Shutdown 20-Pin 4mm × 4mm × 0.75mm QFN Package

Multichemistry Buck Battery Charger Controller with Digital Telemetry System Features: Multichemistry Li-Ion/Polymer, LiFePO4, or Lead-Acid Battery Charger with Termination High Efficiency Synchronous Buck Battery Charger Digital Telemetry System Monitors VBAT, IBAT, RBAT, NTC Ratio (Battery Temperature), VIN, IIN, VSYSTEM, Die Temperature Coulomb Counter and Integrated 14-Bit ADC Wide Charging Input Voltage Range: 4.5V to 35V Wide Battery Voltage Range: Up to 35V Input Undervoltage Charge Current Limit Loop Maximum Power Point Tracking Optional I2C Serial Port Control Input Current Limit Prioritizes System Load Output Input and Output Ideal Diodes Provide Low Loss PowerPath™ Operation Instant-On Operation with Discharged Battery

Standalone Linear Li-Ion Battery Charger with Thermal Regulation in ThinSOT Features: Programmable Charge Current Up to 800mA No MOSFET, Sense Resistor or Blocking Diode Required Complete Linear Charger in ThinSOT™ Package for Single Cell Lithium-Ion Batteries Constant-Current/Constant-Voltage Operation with Thermal Regulation* to Maximize Charge Rate Without Risk of Overheating Charges Single Cell Li-Ion Batteries Directly from USB Port Preset 4.2V Charge Voltage with ±1% Accuracy Charge Current Monitor Output for Gas Gauging* Automatic Recharge Charge Status Output Pin C/10 Charge Termination 25µA Supply Current in Shutdown 2.9V Trickle Charge Threshold (LTC4054) Available Without Trickle Charge (LTC4054X) Soft-Start Limits Inrush Current Available in 5-Lead SOT-23 Package

Standalone Linear Li-Ion Battery Charger with Thermal Regulation in ThinSOT Features: Programmable Charge Current Up to 800mA No MOSFET, Sense Resistor or Blocking Diode Required Complete Linear Charger in ThinSOT™ Package for Single Cell Lithium-Ion Batteries Constant-Current/Constant-Voltage Operation with Thermal Regulation* to Maximize Charge Rate Without Risk of Overheating Charges Single Cell Li-Ion Batteries Directly from USB Port Preset 4.2V Charge Voltage with ±1% Accuracy Charge Current Monitor Output for Gas Gauging* Automatic Recharge Charge Status Output Pin C/10 Charge Termination 25µA Supply Current in Shutdown 2.9V Trickle Charge Threshold (LTC4054) Available Without Trickle Charge (LTC4054X) Soft-Start Limits Inrush Current Available in 5-Lead SOT-23 Package

Linear Li-Ion Charger with Termination in ThinSOT Features: Standalone Li-Ion Charger with Termination Programmable Termination Timer No Sense Resistor or Blocking Diode Required Suitable for USB-Powered Charging Undervoltage Charge Current Limiting Preset Charge Voltage with ±0.6% Accuracy Programmable Charge Current: 200mA to 700mA Automatic Recharge with Shortened Charge Cycle Self-Protection for Overcurrent/Overtemperature 40µA Supply Current in Shutdown Mode Negligible Battery Drain Current in Shutdown Low Battery Charge Conditioning (Trickle Charging) CHRG Status Output including AC Present PCB Total Solution Area only 75mm² (700mA) Low Profile (1mm) SOT-23 Package

Standalone Linear NiMH/NiCd Fast Battery Charger Features: Complete Fast Charger Controller for Single, 2-, 3- or 4-Series Cell NiMH/NiCd Batteries No Firmware or Microcontroller Required Termination by –V, Maximum Voltage or Maximum Time No Sense Resistor or Blocking Diode Required Automatic Recharge Keeps Batteries Charged Programmable Fast Charge Current: 0.4A to 2A Accurate Charge Current: ±5% at 2A Fast Charge Current Programmable Beyond 2A with External Sense Resistor Automatic Detection of Battery Precharge for Heavily Discharged Batteries Optional Temperature Qualified Charging Charge and AC Present Status Outputs Can Drive LED Automatic Sleep Mode with Input Supply Removal Negligible Battery Drain in Sleep Mode: <1µA Manual Shutdown Input Supply Range: 4.5V to 10V Available in 16-Lead DFN and TSSOP Packages

Standalone Linear Li-Ion Battery Charger with Thermistor Input Features: Charge Current Programmable up to 1A Charges Single Cell Li-Ion Batteries Directly from USB Port Preset 4.375V Float Voltage with ±0.4% Accuracy Thermistor Input for Temperature Qualified Charging Input Supply Present Logic Output Thermal Regulation Maximizes Charge Rate Without Risk of Overheating Programmable Charge Current Detection/Termination Programmable Charge Termination Timer Smart Pulsing Error Feature SmartStart™ Prolongs Battery Life 20µA Charger Quiescent Current in Shutdown Available in a Low Profile (0.75mm) 10-Lead (3mm × 3mm) DFN Package

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 Qualied Charging Thin Prole (0.75mm) 24-Lead 4mm x 4mm QFN Package Ultrathin Prole (0.55mm) 24-Lead 4mm x 4mm UTQFN Package (LTC4066 Only)

USB Power Manager with OVP and Li-Ion/Polymer Charger Features: Programmable Input Current Limit: Single Resistor at CLPROG Pin to Set and Monitor Input Current Battery Charger/Ideal Diode/Controller: 13V Overvoltage Protection Full Featured Battery Charger with 4.2V Float Up to 1.25A Programmable Charge Current Thermal Regulation Maximizes Charge Current Without Risk of Overheating Internal 2 Hour Termination Timer from Onset of Voltage Mode Charging Automatic Load Switchover to Battery Power with Internal Ideal Diode and Drive Output for Optional External MOSFET NTC Thermistor Input Bad Battery Time-Out Detection 4mm × 3mm 12-Lead DFN Package