Dual output digital point of load regulator for high density power

March 19, 2019 //By Nick Flaherty
Dual output digital point of load regulator for high density power
Flex Power Modules has launched a digital point-of-load (PoL) regulator for high-current ICT applications.

The BMR469 family delivers a current density of up to 160A per square inch, which saves valuable board space. 

Two variants with different output currents are available, both in compact packages. The 80A BMR4690000 measures 25.4 x 12.7 x 11.6mm (1.00 x 0.50 x 0.46in), while the 50A BMR4696001 provides a low-profile solution with a maximum height of just 5.8mm (0.23in), helping customers who need to find space for a large processor heatsink, or who want to place the PoL regulator on the underside of their PCB. The low height of the BMR4696001 also makes it possible to place it very close to the processor, thus improving transient response.

Both versions are configurable as either dual outputs or a single, higher-power output. This gives customers the flexibility to use one part to cover different requirements, for example to drive different processors or FPGA rails, helping simplify power system design.

The BMR4690000 variant provides two independent 40A outputs for dual configurations, or one 80A rail in single-output operation mode, while the BMR4696001 provides 2 x 25A outputs or one 50A rail in single-output operation mode. Up to four modules can be paralleled for current sharing, delivering a total of up to 320A for the BMR4690000 and 200A for the BMR4696001.

The BMR469 is simple to configure via pin-strap or PMBus, making it easy to set up for different applications. The regulator is also supported by a simulation model in Flex’s Power Designer software, making design and debug work straightforward. In particular, Flex Power Designer’s advanced simulation functions enable customers to optimize configuration parameters, so they can achieve a stable control loop with fast load-transient responses.

The BMR469 is well suited to a broad range of applications in the ICT sector, and in particular is ideal for designs that require high power density and a digital architecture solution, such as test equipment or simulator


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