MAX20474

• Synchronous Boost Converter for Small Solution Size
  • 4A Peak Input Current
  • Resistor Adjustable Output Voltage form 6V to 18V
  • 6V to 18V Fixed Output Selection in 250mV Steps
  • 3.0V to 5.5V Operating Supply Voltage
  • 2.2MHz Switching Frequency Operation
  • Active-Low RESET Output
  • Spread Spectrum Operation
• High Precision Performance
  • ±1.5% Output Voltage Accuracy Fixed Option
  • ±2.2% Output Voltage Accuracy Adjustable Option
  • 81 ±3% UV Monitoring
  • 121 ±3% OV Monitoring
  • Good Load Transient Performance
• Robust for the Automotive Environment
  • Current Mode Control, Forced PWM and SKIP Operation
  • Overtemperature and Short-Circuit Protection
  • Space Saving 3mm x 3.5mm 14-Pin TDFN Package

The MAX20474 evaluation kit (EV kit) evaluates the performance of the MAX20474 synchronous boost converter.

The MAX20474 is a high-efficiency DC-DC converter which boosts a 3.0V to 5.5V input supply from 6V to 18V at up to 1A load. The boost converter achieves ±1.5% output error over load, line, and temperature range.

The device features a 2.2MHz fixed-frequency PWM mode for better noise immunity and load transient response and a pulse-frequency modulation mode (SKIP) for increased efficiency during light load operation. The 2.2MHz frequency operation allows for the use of all ceramic capacitors and minimizes external components. The programmable spread-spectrum frequency modulation minimizes radiated electromagnetic emissions. Integrated low R_DSON switches improve efficiency at heavy loads and simplifies the layout with respect to discrete solutions.

Other features include true shutdown, soft-start, and overcurrent and overtemperature protections.

Applications

• Automotive Point of Load