Analog Devices

The LT8698S is a compact, high efficiency, synchronous monolithic step-down switching regulator designed to power the 5V USB VBUSrail with up to 3A from an input voltage as high as 42V. Programmable cable drop compensation maintains accurate 5V VBUSregulation even for USB sockets separated from the LT8698S by a long cable such as an automobile wiring harness. Silent Switcher Technology and selectable spread-spectrum modulation provide ultralow EMI/EMC.The LT8698S supports a wide variety of portable device charger profiles including USB BC 1.2 CDP, DCP, and SDP as well as common proprietary profiles. Integrated VBUSreset and VBUSregulator disable functions support USB OTG functionality.The LT8698S’s robust high speed USB 2.0 data line switches protect the upstream USB host μController from short-circuit conditions up to 20V and ESD events up to IEC61000-4-2 8kV contact discharge and 15kV air discharge levels. Further VBUSmonitor and fault protection features eliminate the need for a USB power switch. The LT8698S includes two parallel 10nF capacitors from VINto PGND for improved EMI/EMC performance. The LT8698S-1 does not include these capacitors.APPLICATIONSAutomotive USBIndustrial USB

The LT8705A is a high performance buck-boost switching regulator controller that operates from input voltages above, below or equal to the output voltage. The part has integrated input current, input voltage, output current and output voltage feedback loops. With a wide 2.8V to 80V input and 1.3V to 80V output range, the LT8705A is compatible with most solar, automotive, telecom and battery-powered systems. The LT8705A is an improved pin compatible version of the LT8705 and is recommended for new designs. See LT8705A vs LT8705 in the Applications Information section for more information.The LT8705A includes a MODE pin to select among Burst Mode®operation, discontinuous or continuous conduction mode at light loads. Additional features include a 3.3V/12mA LDO, a synchronizable fixed operating frequency, and onboard gate drivers.LT8705LT8705AImproved, pin-to-pin compatible version of LT8705. Recommended for all new designsApplicationsHigh Voltage Buck-Boost ConvertersInput or Output Current Limited Converters

The LT8708 is a high performance buck-boost switching regulator controller that operates from an input voltage that can be above, below or equal to the output voltage. Features are included to simplify bidirectional power conversion in battery/capacitor backup systems and other applications that may need regulation of VOUT, VIN, IOUT, and/or IIN. Forward and reverse current can be monitored and limited for the input and output sides of the converter. All four current limits (forward input, reverse input, forward output and reverse output) can be set independently using four resistors on the PCB.The MODE pin can select between discontinuous conduction mode (DCM), continuous conduction mode (CCM), hybrid conduction mode (HCM) and Burst Mode®operation. In combination with the DIR (direction) pin, the chip can be configured to process power only from VINto VOUTor only from VOUTto VIN. With a wide 2.8V to 80V input and 1.3V to 80V output range, the LT8708 is compatible with most solar, automotive, telecom and battery-powered systems.APPLICATIONSHigh Voltage Buck-Boost ConvertersBidirectional Charging SystemAutomotive 48V Systems

The LT8710 is a synchronous PWM DC/DC controller with a rail-to-rail output current monitor and control. The LT8710 is ideal for many types of power supply topologies and can be easily configured for boost, SEPIC, inverting, or flyback configurations.The LT8710’s rail-to-rail output current monitor and control allows the part to be configured in current limited applications such as battery charging. The FLAG pin can be used as a power good indication or C/10 indication allowing for accurate bulk and float battery voltages.The LT8710’s switching frequency range can be set between 100kHz and 750kHz using an external resistor or synchronized to an external clock.The LT8710 also features innovative EN/FBIN pin circuitry that allows for slowly varying input signals and an adjustable undervoltage lockout function. The pin is also used for input voltage regulation to avoid collapsing a high impedance input supply. Additional features such as frequency foldback and soft-start are integrated. The LT8710 is available in a 20-lead TSSOP package.ApplicationsHigh Power Local Power SupplyWide Input Voltage Range SEPIC/InvertingLead Acid Battery ChargerAutomotive Engine Control Unit (ECU) PowerSolar Panel Power Converter

The LT8711 is a multi-topology current mode PWM controller that can easily be configured as a synchronous buck, boost, SEPIC, ZETA or as a nonsynchronous buck-boost converter. Its dual gate drive voltage inputs optimize gate driver efficiency.The 15µA no-load quiescent current with the output voltage in regulation extends operating run-time in battery powered systems. Low ripple Burst Mode operation enables high efficiency at very light loads while maintaining low output voltage ripple. The LT8711's fixed switching frequency can be set from 100kHz to 750kHz or can be synchronized to an external clock.The additional features include 100% duty cycle capability when in buck mode, a topology selection pin and adjustable soft-start. LT8711 is available in the 20-lead TSSOP and 20-lead 3mm × 4mm QFN packages.ApplicationsGeneral Purpose DC/DC ConversionAutomotive SystemsIndustrial SuppliesSolar Panel Power Converter

The LT8714 is a synchronous PWM DC/DC controller designed for a four quadrant output converter. The output voltage cleanly transitions through zero volts with sourcing and sinking output current capability.The LT8714 is ideal for regulating to positive, negative, or zero volts when configured for the novel four quadrant topology. Applications include four quadrant power supplies, high power bidirectional current sources, active loads, and high power, low frequency signal amplification. In addition, the LT8714 incorporates a power good feature to let the user know if VOUTis above or below its target regulation voltage.The LT8714’s switching frequency range can be programmed between 100kHz and 750kHz via a resistor from the RT pin to GND. A SYNC pin is also provided if the user would like to synchronize the part to an external clock. Additional features such as current limiting and soft-start are included. The LT8714 is available in a 20‑lead TSSOP package.ApplicationsFour Quadrant Power SuppliesBidirectional Current SourcesHigh Power, Low Frequency Signal AmplificationTest and MeasurementElectronic Window Tinting

The LT9890 is a high-precision current monitor with an internal current-sense element supporting up to 150 A of load current. Factory calibration of the current-sense element and a zero temperature coefficient architecture results in less than 1.3% total unadjusted error (TUE). A 26,600:1 input-to-output current ratio with a response bandwidth greater than 3 MHz provides a fast and accurate ground-referenced output signal while being insensitive to ground voltage variations. Minimal power loss is achieved through a low, 150 μΩ current-path resistance and an aspect ratio conducive to wide printed circuit board (PCB) traces. Input voltages from 2.7 V to 65 V are supported. The LT9890 is compatible with the Intel Psys (platform power) applications.ApplicationsComputers and network serversIntel central processing unit (CPU) motherboardsNetwork storageCommunication equipmentElectric vehiclesPhotovoltaics

The LTC1043 is a monolithic, charge-balanced, dual switched capacitor instrumentation building block. A pair of switches alternately connects an external capacitor to an input voltage and then connects the charged capacitor across an output port. The internal switches have a break-before-make action. An internal clock is provided and its frequency can be adjusted with an external capacitor. The LTC1043 can also be driven with an external CMOS clock.The LTC1043, when used with low clock frequencies, provides ultra precision DC functions without requiring precise external components. Such functions are differential voltage to single-ended conversion, voltage inversion, voltage multiplication and division by 2, 3, 4, 5, etc. The LTC1043 can also be used for precise V–F and F–V circuits without trimming, and it is also a building block for switched capacitor filters, oscillators and modulators.The LTC1043 is manufactured using Linear Technology’s enhanced LTCMOS™silicon gate process.ApplicationsPrecision Instrumentation AmplifiersUltra Precision Voltage Inverters, Multipliers and DividersV–F and F–V ConvertersSample-and-HoldSwitched Capacitor Filters

The LTC1044A is a monolithic CMOS switched-capacitor voltage converter. It plugs in for ICL7660/LTC1044 in applications where higher input voltage (up to 12V) is needed. The LTC1044A provides several conversion functions without using inductors. The input voltage can be inverted (VOUT= –VIN), doubled (VOUT= 2VIN), divided (VOUT= VIN/2) or multiplied (VOUT= ±nVIN).To optimize performance in specific applications, a boost function is available to raise the internal oscillator frequency by a factor of seven. Smaller external capacitors can be used in higher frequency operation to save board space. The internal oscillator can also be disabled to save power. The supply current drops to 1.5μA at 5V input when the OSC pin is tied to GND or V+.ApplicationsConversion of 10V to ±10V SuppliesConversion of 5V to ±5V SuppliesPrecise Voltage Division: VOUT= VIN/2 ±20ppmVoltage Multiplication: VOUT= ±nVINSupply Splitter: VOUT= ±VS/2Automotive ApplicationsBattery Systems with 9V Wall Adapters/Chargers

The LTC1045 is a hex level translator manufactured using an enhanced LTCMOS™silicon gate process. It consists of six high speed comparators with output latches and three-state capability. Each comparator’s plus input is brought out separately. The minus inputs of comparators 1 to 4 are tied to VTRIP1while 5 and 6 are tied to VTRIP2.The ISETpin has several functions. When taken to V+the outputs are latched and power is completely shut off. Power/speed can be programmed by connecting ISETto V–through an external resistor.ApplicationsTTL/CMOS to ±5V Analog Switch DriveTTL to CMOS (3V to 15V VCC)ECL to CMOS (3V to 15V VCC)Ground Isolation BufferLow Power RS232 Line Receiver