3.0V to 5.5V Input, 6V to 18V Output, Synchronous Boost Converter

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 RDSON 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

* 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