New Product Introduction

Maxim Integrated MAX1724-3 synchronous buck converter

The MAX17242/MAX17243 high-efficiency, synchronous step-down DC-DC converters with integrated MOSFETs operates over a 3.5 V to 36 V input voltage range.

Maxim MAX1724-3 block diagram

The MAX17242/MAX17243 high-efficiency, synchronous step-down DC-DC converters with integrated MOSFETs operates over a 3.5 V to 36 V input voltage range, and can operate in drop-out condition by running at 99% duty cycle. The converters deliver up to 2A (MAX17242) and 3A (MAX17243) output current and generate fixed output voltages of 3.3 V/5 V, along with the ability to program the output voltage between 1 V to 10 V.

 

Key features

  • Pin Compatibility for 2 A/3 A Options
  • Fixed Output Voltage with ±2% Accuracy
  • 42 V Input Voltage Transient Protection
  • 93% Peak Efficiency

 

Additional features

Eliminates External Components and Reduces Total Cost

  • No Schottky-Synchronous Operation for High Efficiency and Reduced Cost
  • Simple external RC Compensation for Stable Operation at Any Output Voltage
  • All-Ceramic Capacitor Solution: Ultra-Compact Layout with as Few as Eight External Components
  • PGOOD Output and High-Voltage EN Input Simplify Power Sequencing

Reduces Number of DC-DC Converters to Stock

  • Pin Compatibility for 2 A/3 A Options
  • Fixed Output Voltage with ±2% Accuracy (5 V/3.3 V) or Externally Resistor Adjustable (1 V to 10 V) with ±1% FB Accuracy
  • 220 kHz to 2.2 MHz Adjustable Frequency with External Synchronization

Reduces Power Dissipation

  • 93% Peak Efficiency
  • Shutdown Feature Blocks Current Flow from Input-to-Output or Vice-Versa
  • Less Than 5µA (typ) in Shutdown
  • Low 15 µA (typ) Quiescent Current in Standby Mode

Operates Reliably

  • 42 V Input Voltage Transient Protection
  • Fixed 8ms Internal Software Start Reduces Input Inrush Current
  • Cycle-by-Cycle Current Limit, Thermal Shutdown with Automatic Recovery
  • Reduced EMI Emission with Spread-Spectrum Control

 

Applications

  • Distributed Supply Regulation
  • General-Purpose Point-of-Load
  • Wall Transformer Regulation

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