MAX17521ATG+

The MAX17521 dual-output, 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 1A at each output. Each output is programmable from 0.9V to 92%VIN. The feedback voltage regulation accuracy over -40℃ to +125℃ is ±1.7%. The MAX17521 uses peak-current-mode control. Each output can be operated in the pulse-width modulation (PWM) or pulse-frequency modulation (PFM) control schemes. The MAX17521 is available in a 24-pin (4mm × 5mm) TQFN package. Simulation models are available.

Applications

• Industrial Control Power Supplies
• CPU, DSP, or FPGA Power
• Distributed Supply Regulation
• General-Purpose Point of Load

Key features

• Reduces External Components and Total Cost
• No Schottky—Synchronous Operation
• All-Ceramic Capacitors, Compact Layout
• Reduces Number of DC-DC Regulators to Stock
• Wide 4.5V to 60V Input Each Output Adjustable From 0.9V to 92%VIN
• Pin-Selectable 560kHz or 300kHz Switching Frequency
• Independent Input Voltage Pin for Each Output
• Reduces Power Dissipation
• Peak Efficiency >90%
• PFM Mode Enables Enhanced Light-Load Efficiency
• 1μA Shutdown Current
• Operates Reliably in Adverse Industrial Environments
• Hiccup Mode Overload Protection
• Adjustable Soft-Start Pin for Each Output
• Built-In Output Voltage Monitoring with RESET for Each Output
• Adjustable EN/UVLO Threshold for Each Output
• Monotonic Startup Into Prebiased Load
• Overtemperature Protection
• -40℃ to +125℃ Operation