BMR463 Series Non-Isolated Digital DC/DC Regulator

Flex Power Modules' series BMR463 is a digital point-of-load (POL) regulator that enables systems architects to fully monitor and dynamically control the energy that is delivered to processors, FPGAs, ASICs, and others down to a very low, highly economical level.

The 25 A rated BMR463 is optimized for paralleling up to seven modules. This configuration can deliver 175 A, with each module able to be paralleled and unparalleled on demand, dynamically tracking and reducing the power consumption as required and optimizing the configuration for a wide range of load conditions. When the parallel mode is activated, an interleaving-operation reduces electromagnetic interference (EMI) and current-peak levels. A built-in module-to-module group communication bus (GCB) ensures that current sharing is precisely controlled, guaranteeing that at any point of operation each BMR463 delivers the exact current required by the payload while keeping efficiency high.

With an output power of up to 82 W, the BMR463 has a wide input voltage range of 4.5 V to 14 V, and a wide output range of 0.6 V to 3.3 V. Input and output voltages can be programmed on demand via the PMBus or a pin-strap can accommodate any voltage required by the external circuit, reducing the number of products required by board designers, thus lowering costs and reducing time-to-market.

With a high efficiency of 97.1% (5 V_in, 3.3 V output and half load), the module has a small form factor of 25.65 mm x 13.8 mm x 8.2 mm (1.01 inch x 0.543 inch x 0.323 inch) in a horizontally mounted package. Ideal for low board-pitch applications, the module's highly integrated package has a low profile of 8.2 mm (0.323 inch). The module is also available in a vertically-mounted SiP package with dimensions of 26.3 mm x 7.6 mm x 15.8 mm (1.035 inch x 0.30 inch x 0.614 inch). Onboard protection includes input undervoltage protection (UVP) by shutdown, overtemperature protection (OTP), and output short-circuit and overvoltage protection. Other features include voltage tracking and voltage margining, remote control, and power good, a non-linear response for the reduction of decoupling capacitors.

By embedding a digital core in conjunction with a highly efficient power-train and a so-called "U-shape" output stage, the construction of BMR463 is highly optimized to minimize power losses. Power dissipation is thereby reduced, resulting in enhanced lifetime and reliability.