Buck controller for point-of-load rails
The Texas Instruments UCD7230ARGWT is a single-phase step-down buck controller delivering a transistor-driver output. It operates from a 4.75 V to 15.5 V supply rail and switches between 200 kHz and 2 MHz, letting you balance inductor size against switching losses. The synchronous rectifier driver improves efficiency at higher output currents compared to a diode-rectified buck. Control features include current limiting and an enable pin for sequencing.
The 200 kHz to 2 MHz switching range gives you room to shrink magnetics at the high end or reduce switching losses at the low end. A 2 MHz design lets you use a smaller inductor and fewer output capacitors, saving board area in a compact power module. At 200 kHz you get better efficiency and lower EMI, at the cost of larger passives. The controller does not offer clock synchronization, so plan for beat-frequency management if multiple converters share a board.