Tiny transformer helps trim power supply noise

Murata’s L Cancel Transformer (LCT) neutralizes the equivalent series inductance (ESL) of a capacitor to optimize its noise-reducing capabilities. Leveraging nonmagnetic ceramic multilayer technology, the LCT improves power supply noise suppression, while cutting component count.

The LCT component suppresses harmonic noise in power lines within a frequency range of a few MHz to 1 GHz. It achieves this by using negative mutual inductance to lower a capacitor’s ESL, thereby increasing the capacitor’s noise-reduction effectiveness. Murata states that the LCT also significantly reduces the number capacitors required in a power supply noise-reduction circuit design.

Operating at temperatures up to 125°C, the LCT ensures stable negative inductance and low DC resistance of 55 mΩ maximum. Rated current is 3 A maximum. The part is suitable for a wide range of consumer, industrial, and healthcare products. Dimensions of the surface-mount device are just 2.0×1.25×0.95 mm.

The L Cancel Transformer, part number LXLC21HN0N9C0L, is entering production. Samples are available now.

LCT product page

Murata

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