Power modules feature 97% efficiency

National Semiconductor Corp. introduces three new SIMPLE SWITCHER power modules to drive high-output voltage applications in a variety of markets including industrial, communications infrastructure, and military. The easy-to-use LMZ14201H, LMZ14202H, and LMZ14203H power modules provide the efficiency of a synchronous switching regulator with the simplicity of a linear regulator, eliminating the external inductor and complex layout placement challenges typical of switching regulator designs.

The LMZ14201H, LMZ14202H, and LMZ14203H accept an input voltage rail between 6 and 42 V and deliver an adjustable and highly accurate output voltage up to 24 V. A single resistor adjusts the switching frequency to enable greater flexibility of design.

Pin-to-pin compatible with other family members, the modules integrate a shielded inductor and feature efficiency up to 97%.  The integrated inductor alleviates EMI concerns as the modules comply with both CISPR 22 Class B radiated and conducted emissions standards.

The LMZ14201H, LMZ14202H, and LMZ14203H drive loads from 1 to 3 A and are well-suited to generate intermediate bus voltages in systems using a distributed point of load (POL) architecture.  High efficiency and excellent thermal performance make the modules suitable for systems without airflow. In addition, the products used in conjunction with an application-specific circuit can generate a -15 V bias supply so that audio amplifiers such as National’s LME49880 achieve a wider dynamic range.

For more information or to order samples and an evaluation board for each of the modules, contact National Semiconductor Corp., 3689 Kifer Road, Santa Clara, CA 95051. Phone: (800) 272-9959.