IC 15V TO 5V 6A SWITCHED CAP CONVERTER

Electronic Battery 3V 50mAH PIN TYPE

Coin Cell Battery Holders 30MM COIN HOLDER

Electronic Battery 3.6V 0.55Ah WAFER CELL

Battery Management 1.5A Dual USB/AC Adapter Charger

The MAX847 is a complete power-supply and monitoring system for two-way pagers or other low-power digital communications devices. It requires few external components. Included on-chip are: A 1-cell input, 80mA output, synchronous-rectified boost DC-DC regulator with a digitally controlled +1.8V to +4.9V output Three low-noise linear-regulator outputs Three DAC-controlled comparators for software-driven 3-channel A/D conversion SPI™-compatible serial interface Reset and low-battery (LBO) warning outputs Charger for NiCd, NiMH, lithium battery, or storage capacitor for RF PA power or system backup Two 1.8Ω (typical) serial-controlled open-drain MOSFET switchesAn evaluation kit for the MAX847 (MAX847EVKIT) is available to aid in design and prototyping.Applications1-Cell Powered Handheld EquipmentGPS ReceiversTwo-Way Paging

The LTC3106 is a highly integrated, ultralow voltage buck-boost DC/DC converter with automatic PowerPath management optimized for multisource, low power systems. At no load, the LTC3106 draws only 1.6μA while creating an output voltage up to 5V from either input source.If the primary power source is unavailable, the LTC3106 seamlessly switches to the backup power source. The LTC3106 is compatible with either rechargeable or primary cell batteries and can trickle charge a backup battery whenever there is an energy surplus available. Optional maximum power point control ensures power transfer is optimized between power source and load. The output voltage and backup voltage, VSTORE, are programmed digitally, reducing the required number of external components. Zero power Shelf Mode ensures that the backup battery will remain charged if left connected to the LTC3106 for an extended time.Additional features include an accurate turn-on voltage, a power good indicator for VOUT, a user selectable 100mA peak current limit setting for lower power applications, thermal shutdown as well as user selectable backup power and output voltages.Applications Wireless Sensor Networks Home or Office Building Automation Energy Harvesting Remote Sensors

The DS2788 measures voltage, temperature, and current, and estimates available capacity for rechargeable lithium-ion (Li+) and Li+ polymer batteries. Cell characteristics and application parameters used in the calculations are stored in on-chip EEPROM. The available capacity registers report a conservative estimate of the amount of charge that can be removed given the current temperature, discharge rate, stored charge, and application parameters. Capacity estimation is reported in mAh remaining and percentage of full.LED display drivers and a debounced input make display of the capacity information easy. The LED pins can directly sink current, requiring only a resistor for setting the current in the LED display, thus reducing space andcost.ApplicationsDigital CamerasElectric BicyclesElectric VehiclesPower ToolsUninterruptible Power Supply

The DS2746 remains in production, however, for new projects, we recommend ModelGauge m5 MAX17055 fuel gauge.The DS2746 provides system-side battery capacity monitoring in cost-sensitive applications. Voltage, bidirectional current, and accumulated current measurement data is provided to the host processor over a 2-wire interface. Offset bias and offset blanking features greatly enhance the accuracy of the coulomb counter. In addition, the DS2746 has two auxiliary A/D inputs to sample the pack identification resistor, thermistor, or other voltage source. The results are reported as a ratiometric fraction of the supply voltage eliminating error related to the supply. The DS2746 reduces the total power consumption of the measurement circuit by enabling the resistor dividers, through the VOUT pin, only while measurements are made. When the system is inactive, a low power sleep mode reduces current consumption while maintaining the coulomb count. The tiny 3mm × 3mm TDFN package consumes only 9mm² of PCB spaceApplications2.5G/3G Wireless HandsetsDigital Still and Video CamerasHandheld Computers and TerminalsPDA/Smartphones

The DS2781 remains in production, however, for new projects, we recommend ModelGauge m5 MAX17215 fuel gauge.The DS2781 measures voltage, temperature, andcurrent, and estimates available capacity forrechargeable Lithium-Ion and Lithium-Ion Polymerbatteries. Cell stack characteristics and applicationparameters used in the calculations are stored in on-chipEEPROM. The available capacity registersreport a conservative estimate of the amount ofcharge that can be removed given the currenttemperature, discharge rate, stored charge andapplication parameters. Capacity estimation isreported in milliamp hours remaining and percentageof full.ApplicationsCommercial Two-Way RadiosDigital Video CamerasIndustrial PDAs and Handheld PC Data TerminalsPortable GPS Navigation Systems