National Semiconductor has introduced three new Simple Switcher power modules, the first of the family to drive high output voltage applications. The LMZ14201H, LMZ14202H and LMZ14203H accept an input voltage rail between 6V and 42V and deliver an adjustable output voltage up to 24V. A single resistor adjusts the switching frequency to enable greater flexibility of design.
The power modules are said to 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.
Pin-to-pin compatible with other family members, the modules integrate a shielded inductor and feature efficiency up to 97 percent. 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 1A to 3A and are well-suited to generate intermediate bus voltages in systems using a distributed point of load (POL) architecture. National’s power modules are available in a 7-pin, RoHS compliant, 10.16 mm by 13.77 mm by 4.57 mm package with exposed-bottom pad. Priced in quantities of 500, the LMZ14201H costs $6.50, the LMZ14202H is $7.50 and the LMZ14203H is $9.50.