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

The MAX20078 is a high-voltage, synchronous n-channel MOSFET controller for high-current buck LED drivers. The device uses a proprietary average current-mode-control scheme to regulate the inductor current. This control method does not need any control-loop compensation while maintaining nearly constant switching frequency. Inductor current sense is achieved by sensing the current in the bottom synchronous n-channel MOSFET. It does not require any current sense at high voltages. The device operates over a wide 4.5V to 65V input range. The device is designed for high-frequency operation and can operate at switching frequencies as high as 1MHz. The high- and low-side gate drivers have peak source and sink current capability of 2A. The driver block also includes a logic circuit that provides an adaptive nonoverlap time to prevent shoot-through currents during transition. The device includes both analog and PWM dimming. The device includes a 5V VCC regulator capable of delivering 10mA to external circuitry. The device also includes a current monitor that provides an analog voltage proportional to the inductor current. The device has a fault flag that indicates open and shorts across the output. Protection features include inductor current-limit protection, overvoltage protection, and thermal shutdown. The MAX20078 is available in a space-saving (3mm × 3mm), 16-pin TQFN or a 16-pin TSSOP package and is specified to operate over the -40°C to +125°C automotive temperature range. Design Solution: Driver Monitoring Systems Need a New Breed of IR-LED Drivers › Design Solution: Achieve Superior Automotive Exterior Lighting with a High-Power Buck LED Controller ›ApplicationsAutomotive Front LightsAutomotive Matrix LightsConstant-Current RegulatorsHead-Up Displays

The MAX20745 is a fully integrated, highly efficientswitching regulator for applications operating from 4.5V to16V and requiring up to 25A maximum load. This singlechipregulator provides extremely compact, high-efficiencypower-delivery solutions with high-precision outputvoltages and excellent transient response for networking,datacom, and telecom equipment.The IC offers a broad range of programmable featuresthrough capacitors and resistors connected to dedicatedprogramming pins. Using this feature, the operation canbe optimized for a specific application, reducing thecomponent count- and/or setting-appropriate trade-offsbetween the regulator's performance and system cost.Ease of programming enables using the same design formultiple applications.The MAX20745 includes protection capabilities. Positiveand negative cycle-by-cycle overcurrent protection andovertemperature protection ensure a rugged design. Inputundervoltage lockout shuts down the device to preventoperation when the input voltage is out of specification. Astatus pin provides an output signal to show that the outputvoltage is within range and the system is regulating.ApplicationsCommunications EquipmentI/OMemory VDDQNetworking EquipmentPoint-of-Load Voltage RegulatorsServers and Storage EquipmentμP Chipsets

The MAX2679 and MAX2679B low-noise amplifiers (LNA) are designed for GPS L1, Galileo, and GLONASS applications. The devices achieve high gain and low noise figure while maximizing the input-referred 1dB compression point and the 3rd-order intercept point. The MAX2679 achieves excellent performance while consuming only 1mA supply current and providing 0.95dB noise figure. The MAX2679B achieves excellent performance while consuming only 650µA and providing 1.03dB noise figure.The MAX2679/MAX2679B operates from a +1.08V to +1.98V single supply. The devices are available in a very small, lead-free, RoHS-compliant, 0.83mm x 0.83mm wafer-level package (WLP).Design Solution: Empower Wearable Electronics by Turning Down the Current ›ApplicationsCellular Phones with GPSDigital CamerasGPS Front End ModulesNotebook PCs/Ultra-Mobile PCsRecreational NavigationTelematics (Asset Tracking and Management)WatchesWearables

The MAX40200 is an ideal diode current-switch that drops so little voltage that it approaches an order of magnitude better than Schottky diodes.When forward-biased and enabled, the MAX40200 conducts with as little as 85mV of voltage drop while carrying currents as high as 1A. Typical voltage drop is 43mV at 500mA, with the voltage drop increasing linearly at higher currents. The MAX40200 thermally protects itself, and any downstream circuitry, from overtemperature conditions.When disabled (EN = low) the MAX40200 blocks voltages up to 6V in either direction, making it suitable for most low-voltage, portable electronic devices. The MAX40200 operates from a supply voltage of 1.5V to 5.5V.The MAX40200 is available in a tiny, 0.73mm X 0.73mm, 4-bump wafer-level package (WLP), with a 0.35mm bump pitch and only 0.5mm high and 5-pin SOT-23 package. The MAX40200 operates over the extended -40°C to +125°C temperature range.Design Solution: Cut Your Losses—With an Ideal Diode ›Design Solution: Design a Cooler, Safer Smart-Home Hub—Using an Ideal Diode ›How to Add a Diode ORing or Battery Backup Circuit Using the MAX40200 Ideal DiodeApplicationsCellular PhonesElectronic ToysNotebook and Tablet ComputersPortable Media PlayersPortable/Wearable Medical DevicesUSB-Powered Peripherals

The MAX17290/MAX17292 high-efficiency, synchronous step-up DC-DC controllers operate over a 4.5V to 36V input voltage range with 42V input transient protection. The input operating range can be extended to as low as 2.5V in Bootstrapped mode. The MAX17290 and MAX17292 use a constant-frequency, pulse-width modulating (PWM), peak current-mode control architecture. There are multiple versions of the devices offering one or more of the following functions: a synchronization output (SYNCO) for 180° out-of-phase operation, an overvoltage protection function using a separate input pin (OVP), and a reference input pin (REFIN) to allow on-the-fly output voltage adjustment. The MAX17290 and MAX17292 operate in different frequency ranges. All versions can be synchronized to an external master clock using the FSET/SYNC input. The devices are available in a compact 12-pin (3mm x 3mm) TQFN and 10-pin μMAX packages. Both packages have exposed pads. -40°C to +85°C Operation.ApplicationsDistributed Supply RegulationGeneral-Purpose Point-of-LoadOffline Power SuppliesTelecom Hardware

The Olympus series of ICs are the industry’s smallest and robust integrated system protection solutions. The MAX17525 adjustable overvoltage, undervoltage, and overcurrent protection device guards systems against overcurrent faults in addition to positive overvoltage and reverse-voltage faults. When used with an optional external pMOSFET, the device also protects downstream circuitry from voltage faults up to ±60V (for -60V external pFET rating. The device features a low, 31mΩ, on-resistance integrated FET.During startup, the devices are designed to charge large capacitances on the output in a continuous mode for applications where large reservoir capacitors are used on the inputs to downstream devices. Additionally, the devices feature a dual-stage, current-limit mode in which the current is continuously limited to 1x, 1.5x, and 2x the programmed limit, respectively, for a short time after startup. This enables faster charging of large loads during startup.The MAX17525 also feature reverse-current and overtemperature protection. The devices are available in a 20-pin (5mm x 5mm) TQFN package and operate over the -40°C to 125°C temperature range.ApplicationsControl and AutomationHigh-Power ApplicationsHuman Machine InterfacesIndustrial Power SystemsMotion System Drives