Texas Instruments' TPS40422 is a dual-output PMBus synchronous buck controller. It can be configured also for a single, two-phase output. Its wide input range can support 5 V and 12 V intermediate buses. The accurate reference voltage satisfies the need for precision voltage to the modern ASICs and potentially reduces the output capacitance. Voltage mode control is implemented to reduce noise sensitivity and also ensures low duty ratio conversion.

Using the PMBus protocol, the TPS40422 margining function, reference voltage, fault limit, UVLO threshold, soft start time and turn on/off delay can be programmed. In addition, an accurate measurement system is implemented to monitor the output voltages, currents, and temperatures for each channel.