Murata Develops World's Smallest Power Supply Module for Smartphones

Feb 17, 2012
Hiroki Yomogida, Nikkei Electronics
The "2UR" (left) is targeted at smartphones, etc. And the "3EP" (right) has an output power of 1A.
The "2UR" (left) is targeted at smartphones, etc. And the "3EP" (right) has an output power of 1A.
[Click to enlarge image]
A DC-DC converter chip and capacitors are mounted on the surface.
A DC-DC converter chip and capacitors are mounted on the surface.
[Click to enlarge image]

Murata Manufacturing Co Ltd announced a minuscule DC-DC converter module targeted at small electronic devices such as smartphones and tablet computers Feb 15, 2012.

In the case of a product with an output of 0.6A, the module measures 2.5 x 2.3mm and is smaller than any other DC-DC converter module of the same kind in the world. Murata realized the small size by combining its ceramic multilayer board technology and manufacturing technology for ferrite materials to form an inductor (coil for power supply) inside the module substrate.

The DC-DC converter module has already been employed by some mobile product makers and shipped in volume. Murata expects that smartphone, tablet computer and digital camera makers in and outside Japan will use the module for their products.

The newly-developed module is a switching regulator-type DC-DC converter module. Murata calls it "micro DC-DC converter." An inductor was formed inside a multilayer substrate made by using a ferrite material, and a DC-DC converter chip and capacitors for input and output were mounted on the substrate.

The company has already announced a product whose DC-DC converter chip was mounted on its surface by using a similar ferrite board technology (LXDC2HL series). But, for the product, capacitors for input and output have to be externally connected. On the other hand, capacitors for input and output were mounted on the surface of the new module, eliminating the need for external parts and reducing footprint.

"Compared with a DC-DC converter circuit consisting of discrete parts, the footprint of the new module is about one-fourth," Murata said. "And it is about half when compared with the footprint of the products in the 2HL series."