Analog Devices MAX20474 Product Info

• Synchronous Boost Converter for Small Solution Size
  • 4.0A Peak Input Current
  • Resistor-Adjustable Output Voltage from 6V to 18V
  • 6V to 18V Fixed Output Selection in 0.25V Steps
  • 3.0V to 5.5V Operating Supply Voltage
  • 2.2MHz Operation
  • RESET Output
  • Spread Spectrum
• High Precision
  • ±1.5% Output Voltage Accuracy, Fixed
  • ±2.2% Output Voltage Accuracy, Adj
  • 81 ± 3% UV Monitoring
  • 121 ± 3% OV Monitoring
  • Good Load-Transient Performance
• Robust for the Automotive Environment
  • Current-Mode, Forced-PWM, and SKIP Operation
  • Overtemperature and Short-Circuit Protection
  • 3mm x 3.5mm, 14-Pin TDFN
  • -40°C to +125°C Automotive Temperature Range

The MAX20474 is a high-efficiency DC-DC converter that boosts 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, as well as 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 make planning the layout a much simpler task with respect to discrete solutions.

Other features include True Shutdown™, soft-start, overcurrent, and overtemperature protections.

Applications

• Automotive Point of Load