The MAX20433 is a high-efficiency, four-output DC-DC
converter with a windowed watchdog. The OUT1 is a
synchronous step-down converter that converts vehicle
battery voltage to 3.3V at up to 3A. The OUT3 boosts
the OUT1 to 5V at up to 0.5A, while the OUT2/4 lownoise,
low-voltage, synchronous step-down converters
operate from OUT1 and provide a 0.5V to 3.6875V
output voltage range at up to 3.2A. The low-noise
performance eliminates the need for external LDOs and
allows the use of a ferrite bead (LC) filter instead. All
outputs achieve ±1.5% output error.
The device features a 2.1MHz fixed-frequency PWM mode
for all DC-DC outputs for better noise immunity and load-transient
response. The 2.1MHz frequency operation
allows for the use of all ceramic capacitors and minimizes
the external components. The programmable spread-spectrum
frequency modulation minimizes the radiated
electromagnetic emissions. Integrated low-RDSON
switches improve efficiency at heavy loads and make the
layout much simpler with respect to discrete solutions.
The MAX20433 features the MAXQTM power
architecture, which provides precision transient
performance and phase margin. This allows to obtain the
maximum power, performance, and precision while
minimizing system cost for any specific application.
The devices are offered with factory-preset output
voltages. Other features include soft-start, overcurrent,
and overtemperature protection.
Applications
- Advanced Driver-Assistance Systems (ADAS)
Complete documentation is available upon completion of a Non-Disclosure Agreement (NDA). To request an NDA, click here.
