Analog Devices MAX17521 Product Info

• 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%V_IN
  • 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 Active-Low RESET for Each Output
  • Adjustable EN/UVLO Threshold for Each Output
  • Monotonic Startup Into Prebiased Load
  • Overtemperature Protection
  • High Industrial -40°C to +125°C Ambient Operating Temperature Range/-40°C to +150°C Junction Temperature Range

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%V_IN. The feedback voltage regulation accuracy over -40°C to +125°C 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 x 5mm) TQFN package. Simulation models are available.

Applications

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