Standalone Linear Li-Ion Battery Charger with Programmable Termination Features: Programmable Charge Current Up to 950mA Complete Linear Charger in DFN Package No MOSFET, Sense Resistor or Blocking Diode Required Thermal Regulation Maximizes Charge Rate Without Risk of Overheating* Charges Directly from a USB Port Programmable Charge Current Termination Preset 4.2V Charge Voltage with ±1% Accuracy Charge Current Monitor Output for Gas Gauging* Automatic Recharge Charge Status Output “AC Present” Output 2.9V Trickle Charge Threshold (LTC4068) Available Without Trickle Charge (LTC4068X) Soft-Start Limits Inrush Current Low Profile (3mm x 3mm x 0.75mm) DFN Package

60V, 250mA Linear Charger with Low Quiescent Current Features: Wide Input Voltage Range: 2.7V to 60V Adjustable Battery Voltage: 1.2V to 60V Adjustable Charge Current: 10mA to 250mA Low Quiescent Current While Charging: IIN = 4μA Ultralow Battery Drain When Shutdown or Charged: IBAT < 0.01μA Auto Recharge Input Voltage Regulation for High Impedance Sources Thermal Regulation Maximizes Output Current without Overheating Constant Voltage Feedback with ±0.5% Accuracy NTC Thermistor Input for Temperature Qualified Charging Adjustable Safety Timer Charging Status Indication Thermally Enhanced 10-Lead (3mm × 3mm) DFN Package AEC-Q100 Qualified for Automotive Applications

500mA Standalone Li-Ion Charger with Integrated 300mA Synchronous Buck Features: Complete Linear Battery Charger with Integrated Buck Converter Battery Charger: Constant-Current/Constant-Voltage Operation with Thermal Feedback to Maximize Charge Rate Without Risk of Overheating Internal 4.5-Hour Safety Timer for Termination Charge Current Programmable Up to 500mA with 5% Accuracy C/10 Charge Current Detection Output 5µA Supply Current in Shutdown Mode Switching Regulator: High Efciency Synchronous Buck Converter 300mA Output Current 2.7V to 4.5V Input Range (Powered from BAT Pin) 0.8V to VBAT Output Range MODE Pin Selects Fixed (2.25MHz) Constant-Frequency PWM Mode or Low ICC (23µA) Burst Mode®  Operation 2µA BAT Current in Shutdown Mode

500mA Standalone Li-Ion Charger with Integrated 300mA Synchronous Buck Features: Complete Linear Battery Charger with Integrated Buck Converter Battery Charger: Constant-Current/Constant-Voltage Operation with Thermal Feedback to Maximize Charge Rate Without Risk of Overheating Internal 4.5-Hour Safety Timer for Termination Charge Current Programmable Up to 500mA with 5% Accuracy C/10 Charge Current Detection Output 5µA Supply Current in Shutdown Mode Switching Regulator: High Efciency Synchronous Buck Converter 300mA Output Current 2.7V to 4.5V Input Range (Powered from BAT Pin) 0.8V to VBAT Output Range MODE Pin Selects Fixed (2.25MHz) Constant-Frequency PWM Mode or Low ICC (23µA) Burst Mode®  Operation 2µA BAT Current in Shutdown Mode

USB Power Manager with High Voltage Switching Charger Features: Seamless Transition Between Power Sources: Li-Ion Battery, USB, and 6V to 36V External Supply High Efciency 1.2A Charger from 6V to 36V Input with Adaptive Output Control (LTC4089) Load Dependent Charging from USB Input Guarantees Current Compliance 215mΩ Internal Ideal Diode plus Optional External Ideal Diode Controller Provides Low Loss Power Path When External Supply/USB Not Present 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) from USB Input Preset 4.2V Charge Voltage with 0.8% Accuracy C/10 Charge Current Detection Output NTC Thermistor Input for Temperature Qualied Charging Tiny (6mm × 3mm × 0.75mm) 22-Pin DFN Package

Low Power Wireless Charger for Hearing Aids Features:Complete Low Power Wireless NiMH ChargerLow Minimum Input Voltage: 2.2VSmall Total Solution Volume1.5V, 25mA Linear Single-Cell NiMH ChargerTemperature Compensated Charge VoltageIntegrated Rectifier with Overvoltage LimitZinc-Air Battery DetectionReverse Polarity ProtectionThermally Enhanced 6-Lead (2mm × 2mm) DFN package

10mA Wireless Li-Ion Charger with 1.2V Step-Down DC/DC Converter Features: Wireless Li-Ion Battery Charger Plus High Efficiency Multi-Mode Charge Pump DC/DC Wideband Rx Frequency: DC to >10MHz Integrated Rectifier with Overvoltage Limit Pin Selectable Charge Voltage: 4.1V or 4.2V Charge Current: 10mA (Fixed) Low Battery Disconnect: 3.0V NTC Pin for Temperature Qualified Charging DC/DC Regulated Output: 1.2V DC/DC Output Current: Up to 60mA 50kHz/75kHz Switching, No Audible Noise Pushbutton and/or Digital on/off Control for DC/DC Thermally Enhanced 12-Lead 2mm × 2mm LQFN Package

Coulomb Counter/Battery Gas Gauge Features: Indicates Charge Quantity and Polarity ±50mV Sense Voltage Range Precision Timer Capacitor or Crystal Not Required 2.7V to 8.5V Operation High Side Sense 32.55Hz/V Charge Count Frequency 1.5μA Shutdown Current 10-Pin MSOP Package

The MAX1259 battery manager provides backup-batteryswitching for CMOS RAM, microprocessors, or otherlow-power logic ICs. It automatically switches to thebackup battery when the primary power supply is interrupted.Low-loss switches guarantee an input-to-outputdifferential of only 200mV while supplying 250mA fromthe primary power supply or 15mA from the battery.Battery discharge during shipping does not occur in theMAX1259, since the backup battery can be disconnectedby strobing the RST input.A battery-fail output signal indicates when the backupbattery is below +2V, and a power-fail output signal indicateswhen the primary power supply is low. TheMAX1259 monitors the backup battery, warns ofimpending power failures, and switches the memory tothe battery when failures occur. The MAX1259 is pin-compatiblewith the DS1259, but consumes three timesless supply current. Commercial, extended, and militarytemperature range devices are available.ApplicationsBattery Backup for CMOS RAMComputersControllersUninterruptible Power Supplies

The DS2762 high-precision Li+ battery monitor is a data-acquisition, information-storage, and safety-protection device tailored for cost-sensitive battery pack applications. This low-power device integrates precise temperature, voltage, and current measurement, nonvolatile (NV) data storage, and Li+ protection into the small footprint of either a TSSOP package or flip-chip package. The DS2762 is a key component in applications including remaining capacity estimation, safety monitoring, and battery-specific data storage.ApplicationsCell Phones/SmartphonesDigital CamerasPDAs