General Description：

The MAX17504/MAX17504S high-efficiency, highvoltage, synchronously rectified step-down converter withdual integrated MOSFETs operates over a 4.5V to 60Vinput. It delivers up to 3.5A and 0.9V to 90% VIN outputvoltage. Built-in compensation across the output voltagerange eliminates the need for external components. Thefeedback (FB) regulation accuracy over -40°C to +125°Cis ±1.1%. The device is available in a compact (5mm x5mm) 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 reduceinput inrush current. The device also incorporates anoutput enable/undervoltage lockout pin (EN/UVLO) thatallows the user to turn on the part at the desired inputvoltage level. An open-drain RESET pin provides adelayed power-good signal to the system upon achievingsuccessful regulation of the output voltage.

Benefits and Features：

● Eliminates External Components and Reduces Total Cost

• No Schottky-Synchronous Operation for HighEfficiency and Reduced Cost

• Internal compensation for Stable Operation at AnyOutput Voltage

• All Ceramic Capacitor Solution: Ultra-CompactLayout with as Few as Eight External Components

● Reduce Number of DC-DC Regulators to Stock

• Wide 4.5V to 60V Input Voltage Range

• 0.9V to 90% VIN Output Voltage

• Delivers Up to 3.5A Over Temperature

• 100kHz to 2.2MHz Adjustable Frequency withExternal Synchronization

• MAX17504S Allows Higher Frequency Of Operation

• Available in a 20-Pin, 5mm x 5mm TQFN Package

● Reduce Power Dissipation

• Peak Efficiency > 90%

• PFM and DCM Modes for High Light-Load Efficiency

• Shutdown Current = 2.8FA (typ)

● Operate Reliably

• Hiccup-Mode Current Limit and Autoretry Startup

• Built-In Output Voltage Monitoring—(Open-DrainRESET Pin)

• Resistor Programmable EN/UVLO Threshold

• Adjustable Soft-Start and Pre-Biased Power-Up

• High Industrial -40°C to +125°C Ambient OperatingTemperature Range/-40°C to +150°C JunctionTemperature Range

Applications：

● Industrial Power Supplies

● Distributed Supply Regulation

● Base Station Power Supplies

● Wall Transformer Regulation

● High-Voltage Single-Board Systems

● General-Purpose Point-of-Load