Step-up controller for single-rail boost designs
The Maxim Integrated MAX772CSA is a step-up (boost) DC-DC controller designed for applications requiring a regulated output voltage higher than the input. The switching frequency is programmable up to 300kHz, which allows a trade-off between inductor size and switching losses.
Switching frequency and external component sizing
With a switching frequency up to 300kHz, the MAX772CSA lets you use smaller inductors and capacitors compared to lower-frequency controllers, which helps reduce board area. The trade-off is slightly higher switching losses in the external transistor, so the actual frequency selection should balance efficiency against component size for the target output current.
Supply voltage and output configuration
The controller accepts a supply voltage from 3V to 16.5V, making it suitable for systems running on 3.3V, 5V, or 12V rails. The output is configured as a positive boost topology with a single phase, and the transistor driver output allows connection to an external N-channel or P-channel MOSFET. An enable control feature is included for power sequencing or shutdown.
Temperature grade and environment
It is not specified for industrial or automotive temperature extremes.
RoHS compliance and lifecycle
However, it is listed as RoHS non-compliant, which is a critical consideration for designs targeting EU RoHS or similar environmental regulations. If RoHS compliance is required, a lead-free alternate should be evaluated.