Simplified Block Diagram
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- 3.0V to 4.0V Operating Supply Voltage
- 3.8V to 5.25V Fixed Output
- 500mA Output Version Populated; Compatible with 1A and 2A Output Versions
- 2.2MHz Operation
- Feedback Injection Point to Test Stability
- Robust for the Automotive Environment
- Current Mode, Forced-PWM and Skip Operation
- Overtemperature and Short-Circuit Protection
- -40°C to +125°C Operating Range
- Proven PCB Layout
- Fully Assembled and Tested
- Automotive CAN Transceivers
- Automotive Point of Load
The MAX20471 evaluation kit demonstrates the performance of the MAX20471, which is part of the MAX20471–MAX20473 series of high-efficiency, low-voltage DC-DC converters. The converter ICs boost a 3.0V to 4.0V input supply to between 3.8V and 5.25V at up to 500mA. The boost converters achieve ±1.5% output error over load, line, and temperature range.
The IC features a 2.2MHz fixed-frequency forced-PWM (FPWM) 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 enables the use of all-ceramic capacitors and minimizes external components. The programmable spread-spectrum-frequency modulation minimizes radiated electromagnetic emissions. Integrated low RDS(ON) switches improve efficiency at heavy loads and make the layout a much simpler task with respect to discrete solutions.
The regulator includes True Shutdown™, soft-start, overcurrent, and overtemperature protections.