Multi-output regulator supplies DDR2/3 voltages

25 June 2008 Power Electronics / Power Management

STMicroelectronics has combined all supply voltage and reference sources for a multimedia chipset and DDR2/3 memory into its PM6641 multi-output regulator. The regulator, housed in a 7 x 7 mm QFN-48 package, integrates three programmable switching regulators, a 2 A rated linear low dropout regulator (LDO) and a low-noise reference, and also meets the latest industry specifications for ultra-mobile PCs (UMPC). The three outputs are independently adjustable from 0,8 to 2,5 V, enabling space savings in a variety of applications, including notebook and sub-notebook PCs, portable gaming terminals, set-top boxes, HDTVs and personal video recorders (PVR). By satisfying power requirements for double data rate 3 (DDR3) memory, the PM6641 addresses new products using the latest high-speed memory standard. Protection features include thermal protection, separate power-good signals, latched over-voltage and under-voltage protection, and active soft-end for all outputs.

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