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60V, 1A, Dual-Output, High-Efficiency, Synchronous Step-Down DC-DC Converter

Industry's First 60V, 1A Dual Step-Down DC-DC Converter with Integrated MOSFETs

Product Details

Key Features

Applications/Uses

Simplified Block Diagram

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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 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

Applications/Uses

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

Description

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°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.

Simplified Block Diagram

MAX17521: Block Diagram MAX17521: Block Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .