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The MAX17551 high-efficiency, high-voltage, synchronousstep-down DC-DC converter with integratedMOSFETs operates over a 4V to 60V input. The convertercan deliver up to 50mA and generates output voltagesfrom 0.8V up to 0.9 x VIN. The feedback (FB) voltage isaccurate to within ±1.75% over -40°C to +125°C.The MAX17551 uses peak-current-mode control and canbe operated in pulse-width modulation (PWM) or pulse-frequencymodulation (PFM) modes.The device is available in a 10-pin (3mm x 2mm) TDFNand 10-pin (5mm x 3mm) µMAX® packages. Simulationmodels are available.ApplicationsBattery-Powered EquipmentHigh-Voltage LDO ReplacementHVAC and Building ControlIndustrial Sensors and Process Control

The MAX17558 is a dual-output, synchronous step-downcontroller that drives nMOSFETs.The device features a peak-current-mode, constant-frequencyarchitecture, allowing it to operate up to 2.2MHz. The device can be configured as two single-phase,independent 10A power supplies or as a dual-phase,single-output 20A power supply. The device alsoprovides the ability to run two controllers 180° out-ofphaseto reduce the power loss and noise due to theinput-capacitor ESR.The IC supports current sensing using either an externalcurrent-sense resistor for accuracy or an inductor DCRfor improved system efficiency. Current foldback limitsMOSFET power dissipation under short-circuit conditions.The IC provides independent adjustable soft-start foreach output and can start up monotonically into aprebiased output. The IC can be configured in eitherPWM or DCM modes of operation, depending on whetherconstant-frequency operation or light-load efficiency isdesired.The IC operates over the -40°C to +125°C temperaturerange and is available in a lead(Pb)-free, 32-pin TQFN,5mm x 5mm package with an exposed pad.ApplicationsComputerized Numerical ControlDistributed DC Power SystemsIndustrial Power SuppliesMotion ControlProgrammable Logic Controllers

The MAX17574, high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4.5V to 60V input. The converter can deliver up to 3A current. Output voltage is programmable from 0.9V up to 90%VIN. The feedback voltage regulation accuracy over -40°C to +125°C is ±0.9%.The MAX17574 features a peak-current-mode control architecture. The device can be operated in the pulse-width modulation (PWM), pulse-frequency modulation (PFM) or discontinuous-conduction mode (DCM) control schemes. A programmable soft-start feature allows users to reduce input inrush current. The device also incorporates an output enable/undervoltage lockout pin (EN/UVLO) that allows the user to turn on the part at the desired input voltage level. An open-drain active-low RESET pin provides a delayed power-good signal to the system upon achieving successful regulation of the output voltage.The MAX17574 is available in a 24-pin (4mm x 5mm) TQFN package. Simulation models are available.Design Solution: Design 20W–30W Power Supplies with Over 90% Efficiency for 24V+ Industrial Automation Systems ›ApplicationsBase Station Power SuppliesDistributed Supply RegulationGeneral-Purpose Point-of-LoadHigh-Voltage, Single-Board SystemsIndustrial Control Power SuppliesWall Transformer Regulation

The MAX17682 is a high-voltage, high-efficiency, iso-buck DC-DC converter designed to provide isolated power up to 10W. The device operates over a wide 4.5V to 42V input voltage range and uses primary-side feedback to regulate the output voltage. It delivers primary peak current up to 3.7A and regulates primary output voltage to within ±1.2% over -40°C to +125°C.The device features peak-current-mode control with pulse-width modulation (PWM) scheme. The low-resistance, on-chip MOSFETs ensure high efficiency at full load and simplify the layout.A programmable soft-start feature allows users to reduce input inrush current. The device also incorporates an output enable/undervoltage lockout pin (EN/UVLO) that allows the user to turn on the part at the desired inputvoltage level. An open-drain, active-low RESETB pin provides a delayed power-good signal to the system upon achieving successful regulation of the primary output voltage.The device operates over the -40°C to +125°C industrial temperature range and is available in a compact 20-pin (4mm x 4mm) TQFN package. Simulation models are available.ApplicationsCommunication Hub in Smart MetersFloating Power Supply GenerationIndustrial Process ControlIsolated Power Supplies in Medical Equipment