The ACT43750 radar power supply integrates a ~30 ns fast drain-switch, a 13-bit DAC base gate regulator, and RFPAs (radio frequency power amplifiers) for sequencing into one standalone solution. Each RFPA drain node is switched ON or OFF by the DSW50 block, which takes a pre-regulated 10V-55V supply. In tandem with a dedicated state machine, the REGG block provides each RFPA gate node with a low-noise supply for sequencing and protection. The state machine automates RFPA gate-voltage calibration control at the proper VGATE - IDQ bias point.

 

Along with the ACT43850, the family offers a compact, complete power supply system for radar systems demanding a fast transient and high-current pulse load. The ACT43850 RFPoL (RF point of load) provides a low-noise, fast-responding DC output supply for RFPA drain nodes.

 

The ACT43750 is available in a 40-pin, 5 mm x 5 mm, 0.4-mm pitch QFN package with three (3) pins removed to maintain creepage distance(s) for high voltage power rails.