Analog Devices Inc.

Category: Power Management ICs

The MAX17504/MAX17504S high-efficiency, high-voltage, synchronously rectified step-down converter with dual integrated MOSFETs operates over a 4.5V to 60V input. It delivers up to 3.5A and 0.9V to 90% VIN output voltage. Built-in compensation across the output voltage range eliminates the need for external components. The feedback (FB) regulation accuracy over -40°C to +125°C is ±1.1%. The device is available in a compact (5mm x 5mm) TQFN lead (Pb)-free package with an exposed pad. Simulation models are available.The device features a peak-current-mode controlarchitecture with a MODE feature that can be used tooperate the device in pulse-width modulation (PWM),pulse-frequency modulation (PFM), or discontinuousmode (DCM) control schemes. PWM operation providesconstant frequency operation at all loads, and is usefulin applications sensitive to switching frequency. PFMoperation disables negative inductor current andadditionally skips pulses at light loads for high efficiency.DCM features constant frequency operation down tolighter loads than PFM mode, by not skipping pulses,but only disabling negative inductor current at light loads.DCM operation offers efficiency performance that liesbetween PWM and PFM modes. The MAX17504S offersa lower minimum on-time that allows for higher switchingfrequencies and a smaller solution size.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.ApplicationsBase Station Power SuppliesDistributed Supply RegulationGeneral-Purpose Point-of-LoadHigh-Voltage Single-Board SystemsIndustrial Power SuppliesWall Transformer Regulation

$2.69 - $7.62