Analog Devices Inc./Maxim Integrated

The LT8610AX is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator rated to 175°C junction temperature. The LT8610AX is 100% tested a 175°C. Top and bottom power switches are included with all necessary circuitry to minimize the need for external components. Low ripple Burst Mode operation enables high efficiency across a wide range of output currents while keeping the output ripple low. A SYNC pin allows synchronization to an external clock. Internal compensation with peak current mode topology allows the use of small inductors and results in fast transient response and good loop stability. The EN/UV pin has an accurate 1V threshold and can be used to program VINundervoltage lockout or to shut down the LT8610AX. A capacitor on the TR/SS pin programs the output voltage ramp rate during startup while the PG flag signals when VOUTis within ±9% of the programmed output voltage as well as fault conditions. The LT8610AX is available in small 16-lead MSOP package with exposed pad for low thermal resistance.Feedback VoltageMin VINOutput CurrentNotesLT8610AC-10.80V3.0V3.5AFsw = 1.5MHz to 2.2MHz, Optimized Transient ResponseLT8610AC0.80V3.0V3.5AFsw = 200kHz to 2.2MHzLT8610AB0.97V3.4V3.5AImproved Burst Mode EfficiencyLT8610AX0.97V3.4V3.5A175°C Max Junction TempLT8610A0.97V3.4V3.5AHigher Iout, 30ns Min On TimeLT86100.97V3.4V2.5A-ApplicationsOil and Gas Exploration

The LT8614 step-down regulator features Silent Switcher architecture designed to minimize EMI emissions while delivering high efficiency at frequencies up to 3MHz. Assembled in a 3mm × 4mm QFN, the monolithic construction with integrated power switches and inclusion of all necessary circuitry yields a solution with a minimal PCB footprint. An ultralow 2.5μA quiescent current—with the output in full regulation— enables applications requiring highest efficiency at very small load currents. Transient response remains excellent and output voltage ripple is below 10mVP-Pat any load, from zero to full current.The LT8614 allows high VINto low VOUTconversion at high frequency with a fast minimum top switch on-time of 30ns. Operation is safe in overload even with a saturated inductor.Essential features are included and easy to use: An open-drain PG pin signals when the output is in regulation. The SYNC pin allows clock synchronization and choice of Burst Mode operation or pulse-skipping mode. Soft-start and tracking functionality is accessed via the TR/SS pin. An accurate enable threshold can be set using the EN/UV pin and a resistor at the RT pin programs switch frequency.ApplicationsAutomotive and Industrial SuppliesGeneral Purpose Step-DownGSM Power Supplies

The LT®8615 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that can deliver 3.5A of continuous current. The LT8615’s ultralow 2.5μA quiescent current in Burst Mode operation (with the output in full regulation) enables high efficiency down to very low load currents while keeping the output ripple below 10mVP-P.A SYNC pin allows synchronization to an external clock or spread-spectrum modulation for low EMI operation. Internal compensation with peak current-mode topology allows the use of small inductors and results in fast transient response and good loop stability. The EN/UV pin has an accurate 1V threshold and can be used to program VINUVLO or to shut down the part. A capacitor on the TR/SS pin programs the output voltage ramp rate during start-up. An open-drain PG pin flag signals when the output is within ±8% as well as fault conditions.APPLICATIONSAutomotive and Industrial SuppliesLow EMI Step-Down

The LT8616 is a high efficiency, high speed, dual synchronous monolithic step-down switching regulator that consumes only 6.5μA of quiescent current with both channels enabled. Both channels contain all switches and necessary circuitry to minimize the need for external components. Low ripple Burst Mode operation enables high efficiency down to very low output currents while minimizing output ripple. A SYNC pin allows synchronization to an external clock. Internal compensation with peak current mode topology allows the use of small inductors and results in fast transient response and good loop stability. The enable pins have accurate 1V thresholds and can be used to program undervoltage lockout. Capacitors on the TR/SS pins programs the output voltage ramp rate during startup while the PG pins signal when each output is within 10% of the programmed output voltage. The LT8616 is available in a TSSOP package for high reliability.ApplicationsAutomotive and Industrial SuppliesGeneral Purpose Step-Down

The LT8618 family are compact, high speed synchronous monolithic step-down switching regulators that deliver up to 100mA to the output with high efficiency at a constant frequency, even up to 2.2MHz. They accept a wide input voltage range up to 65V (transients only, 60V for continuous operation), and consume only 2.5μA of quiescent current when operating in Burst Mode. Top and bottom power switches are included with all necessary circuitry to minimize the need for external components.The LT8618C includes BST and INTVCCceramic capacitors for a more compact solution while having SYNC/MODE and HYST pins. The SYNC/MODE pin selects the regulator’s operation between forced continuous mode, for predictive interference in sampling systems, Burst Mode, for increased efficiency at light loads or spread spectrum for Low EMI. It also allows synchronization to an external clock to further increase signal to noise ratio in high-resolution acquisition systems.A PG flag signals when VOUTis within ±7.5% of the programmed output voltage and when in fault conditions. Thermal shutdown provides additional protection.PACKAGESYNC/HYST150°C GRADEINTERNAL CAPSFB RESISTORSLT8618DFNNoYesNoExternalLT8618-3.3DFNNoYesNoInternalLT8618CLQFNYesNoYesExternalApplicationsIndustrial SensorsIndustrial Internet of Things4mA to 20mA Current LoopsFlow MetersAutomotive Housekeeping Supplies