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.

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