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42V, 500mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converter

42V Synchronous Buck Converter with Internal FETs Enables High Efficiency

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, Ultra-Compact Layout
  • Reduces Number of DC-DC Regulators to Stock
    • Wide 4.5V to 42V Input
    • Adjustable 0.9V to 92%VIN Output
    • Delivers up to 500mA
  • Reduces Power Dissipation
    • Peak Efficiency > 90%
    • Shutdown Current = 0.9µA (typ)
  • Operates Reliably in Adverse Industrial Environments
    • Hiccup-Mode Current Limit, Sink Current Limit, and Autoretry Startup
    • Built-In Output-Voltage Monitoring (Active-Low RESET Pin)
    • Programmable EN/UVLO Threshold
    • Adjustable Soft-Start and Prebiased Power-Up
    • High Industrial -40°C to +125°C Ambient Operating Temperature Range/-40°C to +150°C Junction Temperature Range

Applications/Uses

  • Base Station, VOIP, Telecom
  • Battery-Powered Equipment
  • General-Purpose Point of Load
  • Home Theatre
  • HVAC and Building Control
  • Industrial Process Control

Description

The MAX17541G high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over 4.5V to 42V input. The converter can deliver up to 500mA and generates output voltages from 0.9V up to 0.92 x VIN. The feedback (FB) voltage is accurate to within ±1.7% over -40°C to +125°C.

The MAX17541G uses peak-current-mode control with pulse-width modulation (PWM) and operates with fixed 600kHz switching frequency at any load. The device is available in a 10-pin (3mm × 2mm) TDFN package. Simulation models are available.

Simplified Block Diagram

MAX17541G: Block Diagram MAX17541G: 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 .