POL DC/DC converters target embedded applications

Murata Power Solutions is targeting space constrained embedded applications with the OKDx-T/20-W12 and OKDx-T/25-W12 series point of Load (PoL) DC/DC converters. Designed to provide a combination of high power density and efficiency, the PMBus compatible digital power solution is intended to power CPUs, datacom/telecom systems, distributed bus architectures (DBA), programmable logic, and mixed voltage systems in the networking, computing/servers, telecom, and industrial market sectors.

Expanding Murata's Okami range of non-isolated PoL DC/DC converters, the digitally controlled OKDx-T/20-W12 and OKDx-T/25-W12 can deliver 20A/66W and 25A/82.5W output respectively, from a module that measures only 25.65 x 13.8 x 8.2 mm (1.01 x 0.543 x 0.323 in).

Offered in three different packages - through-hole, single-in-line and surface-mount - the converters can be configured and monitored via the standard PMBus communication protocol. They have been designed to accept input voltages from 4.5V to 14V and have an output voltage range of 0.6V to 3.3V with a typical efficiency of 97.1% at 5Vin, 3.3Vout and at 50% load.

The products are delivered with a default firmware configuration suitable for a wide range of operation in terms of input voltage, output voltage, and load.Both series' power management design includes advanced features like non-linear transient response, phase spreading, synchronisation, digital current sharing, and optimised dead time control.

In addition, the 25A PoLs (OKDx-T/25-W12) series also has 'Dynamic Loop Compensation', where the PID parameters of the control loop are automatically calculated and configured depending on the operating conditions and output filter.It measures the characteristics of the power train, calculates the proper compensator PID coefficients and implements them.

Other standard features include short circuit, over current, over voltage, over temperature, input under voltage protection, voltage margining and tracking, power good, remote sense and remote on/off.