Analog Devices Inc./Maxim Integrated

The LTC4125 is a simple and high performance monolithic full bridge resonant driver capable of delivering over 5W of power wirelessly to a properly tuned receiver. The device controls the current flow in a series connected transmit coil LC network to create a simple, safe and versatile wireless power transmitter.The LTC4125 automatically adjusts its driving frequency to match the LC network resonant frequency. This AutoResonant switching allows the device to deliver maximum power from a low voltage input supply (3V to 5.5V) to a tuned receiver. To optimize system efficiency, the LTC4125 employs a periodic transmit power search and adjusts the transmission power based on the receiver load requirements. The device stops delivering power during a fault condition, or if a foreign object is detected.The LTC4125 also includes a programmable maximum average input current limit and an NTC input as additional means for foreign object and overload protection. The LTC4125 is available in a 20-lead low profile (0.75mm) 4mm × 5mm QFN package.ApplicationsHermetically and/or Electrically Insulated DevicesMilitary Sensors and DevicesMedical EquipmentIndustrial Handhelds

The LTC4126-10 is a low-power wireless single-cell Li-Ion battery charger with an integrated step-down DC/ DC regulator. The step-down regulator is a low-noise multimode charge pump which is powered from the battery and provides a regulated 1.2V at the output. The switching frequency is set to either 50kHz or 75kHz depending on the mode to keep any switching noise out of the audible range.The LTC4126-10 charger is a full-featured constant-current constant-voltage Li-Ion battery charger with automatic recharge, automatic termination by safety timer, and battery temperature monitoring via an NTC pin. Charge current is fixed at 10mA with a 3-hour termination timer. Undervoltage protection disconnects the battery from all loads when the battery voltage is below 3.0V.The tiny 2mm × 2mm LQFN package and minimal external component count make the LTC4126-10 well suited for Li-Ion battery powered hearing aid applications and other low power portable devices where a small solution size is required.ApplicationsHearing AidsLow Power Li-Ion Powered DevicesWireless HeadsetsIoT Wearables

The LTC4126-10 is a low-power wireless single-cell Li-Ion battery charger with an integrated step-down DC/ DC regulator. The step-down regulator is a low-noise multimode charge pump which is powered from the battery and provides a regulated 1.2V at the output. The switching frequency is set to either 50kHz or 75kHz depending on the mode to keep any switching noise out of the audible range.The LTC4126-10 charger is a full-featured constant-current constant-voltage Li-Ion battery charger with automatic recharge, automatic termination by safety timer, and battery temperature monitoring via an NTC pin. Charge current is fixed at 10mA with a 3-hour termination timer. Undervoltage protection disconnects the battery from all loads when the battery voltage is below 3.0V.The tiny 2mm × 2mm LQFN package and minimal external component count make the LTC4126-10 well suited for Li-Ion battery powered hearing aid applications and other low power portable devices where a small solution size is required.ApplicationsHearing AidsLow Power Li-Ion Powered DevicesWireless HeadsetsIoT Wearables

The LTC4150 measures battery depletion and charging in handheld PC and portable product applications. The device monitors current through an external sense resistor between the battery’s positive terminal and the battery’s load or charger. A voltage-to-frequency converter transforms the current sense voltage into a series of output pulses at the interrupt pin. These pulses correspond to a fixed quantity of charge flowing into or out of the battery. The part also indicates charge polarity as the battery is depleted or charged.The LTC4150 is intended for 1-cell or 2-cell Li-Ion and 3-cell to 6-cell NiCd or NiMH applications.ApplicationsBattery ChargersPalmtop Computers and PDAsCellular Telephones and Wireless Modems

The LTC4151 is a high side power monitor that operates over a wide voltage range of 7V to 80V. In default operation mode, the on-board 12-bit ADC continuously measures high side current, input voltage and an external voltage. Data is reported through the I2C interface when polled by a host. The LTC4151 can also perform on-demand measurement in a snapshot mode. The LTC4151 features a dedicated shutdown pin to reduce power consumption. The LTC4151‑1/LTC4151-2 feature split I2C data pins to drive opto-isolators. The data out on the LTC4151-1 is inverted while that on the LTC4151-2 is not.Applications–48V Telecom InfrastructureAutomotiveIndustrialConsumer

The LTC4155 is a 15 watt I2C controlled power manager with PowerPath™instant-on operation, high efficiency switching battery charging and USB compatibility. The LTC4155 seamlessly manages power distribution from two 5V sources, such as a USB port and a wall adapter, to a single-cell rechargeable Lithium-Ion/Polymer battery and a system load.The LTC4155’s switching battery charger automatically limits its input current for USB compatibility, or may draw up to 3A from a high power wall adapter. The high efficiency step-down switching charger is designed to provide maximum power to the application and reduced heat in high power density applications.I2C adjustability of input current, charge current, battery float voltage, charge termination, and many other parameters allows maximum flexibility. I2C status reporting of key system and charge parameters facilitates intelligent control decisions. USB On-The-Go support provides 5V power back to the USB port without any additional components. A dual-input, priority multiplexing, overvoltage protection circuit guards the LTC4155 from high voltage damage on the VBUSpin.The LTC4155 is available in the low profile 28-lead 4mm × 5mm × 0.75mm QFN surface mount package.ApplicationsTablet PCsUltra Mobile PCsVideo Media PlayersDigital Cameras, GPS, PDAsSmart PhonesPortable Medical Devices

The LTC4156 is a 15 watt I2C controlled power manager with PowerPath™instant-on operation, high efficiency switching battery charging and USB compatibility. The LTC4156 seamlessly manages power distribution from two 5V sources, such as a USB port and a wall adapter, to a single-cell rechargeable lithium iron phosphate battery and a system load.The LTC4156’s switching battery charger automatically limits its input current for USB compatibility, or may draw up to 3A from a high power wall adapter. The high efficiency step-down switching charger is designed to provide maximum power to the application and reduced heat in high power density applications.I2C adjustability of input current, charge current, battery float voltage, charge termination, and many other parameters allows maximum flexibility. I2C status reporting of key system and charge parameters facilitates intelligent control decisions. USB On-The-Go support provides 5V power back to the USB port without any additional components. A dual-input, priority multiplexing, overvoltage protection circuit guards the LTC4156 from high voltage damage on the VBUSpin.The LTC4156 is available in the low profile (0.75mm) 28-lead 4mm × 5mm QFN surface mount package.ApplicationsPortable Medical DevicesPortable Industrial DevicesBackup Devices

The LTC4160/LTC4160-1 are high efficiency power management and Li-Ion/Polymer battery charger ICs. They each include a bidirectional switching PowerPath™controller with automatic load prioritization, a battery charger, and an ideal diode.The LTC4160/LTC4160-1’s bidirectional switching regulator transfers nearly all of the power available from the USB port to the load with minimal loss and heat which eases thermal constraints in small spaces. These devices feature a precision input current limit for USB compatibility and Bat-Track output control for efficient charging. In addition, the ICs can also generate 5V at 500mA for USB On-The-Go applications.An overvoltage circuit protects the LTC4160/LTC4160-1 from high voltage damage on the USB/wall adapter inputs with an external N-channel MOSFET and a resistor.The LTC4160/LTC4160-1 are available in a 3mm × 4mm × 0.75mm QFN surface mount package.ApplicationsMedia Players and Personal Navigation DevicesDigital Cameras, PDAs, Smart Phones

The LTC4162-F is an advanced monolithic synchronous step-down switching battery charger and PowerPath™manager that seamlessly manages power distribution between input sources such as wall adapters, backplanes, solar panels, etc., and a rechargeable lithium iron phosphate battery.A high resolution measurement system provides extensive telemetry information for circuit voltages, currents, battery resistance and temperature which can all be read back over the I2C port. The I2C port can also be used to configure many charging parameters including charging voltages and currents, termination algorithms and numerous system status alerts.The LTC4162-F can charge LiFePO4 cell stacks from 1 cell to 9 cells with as much as 3.2A of charge current.The power path topology decouples the output voltage from the battery allowing a portable product to start up instantly under very low battery voltage conditions.The LTC4162-F is available in a thermally enhanced 28-pin 4mm × 5mm × 0.75mm QFN surface mount package.ApplicationsMedical InstrumentsUSB-C Power DeliveryIndustrial HandheldsRuggedized NotebooksTablet Computers

The LTC4162-F is an advanced monolithic synchronous step-down switching battery charger and PowerPath™manager that seamlessly manages power distribution between input sources such as wall adapters, backplanes, solar panels, etc., and a rechargeable lithium iron phosphate battery.A high resolution measurement system provides extensive telemetry information for circuit voltages, currents, battery resistance and temperature which can all be read back over the I2C port. The I2C port can also be used to configure many charging parameters including charging voltages and currents, termination algorithms and numerous system status alerts.The LTC4162-F can charge LiFePO4 cell stacks from 1 cell to 9 cells with as much as 3.2A of charge current.The power path topology decouples the output voltage from the battery allowing a portable product to start up instantly under very low battery voltage conditions.The LTC4162-F is available in a thermally enhanced 28-pin 4mm × 5mm × 0.75mm QFN surface mount package.ApplicationsMedical InstrumentsUSB-C Power DeliveryIndustrial HandheldsRuggedized NotebooksTablet Computers