I'm open to input...
for the design of a power supply to operate in a diesel, semi-trailer environment. The circuit operates on 5V at 150mA with peaks of 400mA. The actual device includes 3 microcontrollers, some analog, a DAC, SPI, I2C, RS232, 38,400 baud comms with a satellite receiver, and SPI comms with a wired keypad.
This is a busy design in a noisy/harsh environment internally and externally.
The previous designer chose the LM2937ET - 5.0 but this a big task to ask for such an LDO and I'm not happy with the heat generated or parasidic power draw from the battery when the vehicle is parked.
Ideas welcome. shawn