CUI Intros 500-mA Switching Regulator Replacements for LMXX78 and LMXX79 Linears

CUI Inc. today announced its 2nd generation non-isolated dc switching regulator series rated at 500 mA. The company’s new P7805-S series implements several upgrades, including an increased power density, efficiency improvements and a decrease in ripple and noise, all at a lower per unit cost. The series delivers efficiencies over 96% and is able to maintain a high efficiency rating across the full input range; still providing up to 95% efficiency at a highline input of 32 Vdc.

The P7805-S has been designed as a high-performance, drop-in alternative to LMXX78 and LMXX79 linear regulators, eliminating the need for a heat sink. The devices are targeted at portable devices, battery-fed equipment, and embedded designs where board space is at a premium and energy efficiency is a concern.

The P7805-S series boasts a wide input range (4.75- to 32-Vdc), varying in line with the output voltage configuration. Output options include 1.5-, 1.8-, 2.5-, 3.3-, 5-, 6.5-, 9-, 12-, and 15-Vdc. To address LMXX79 applications, CUI has designed all units in the series with the added capability of supporting a positive to negative voltage conversion, increasing the series’ flexibility.

The units are housed in a compact 3-pin TO-220 compatible SIP package measuring 11.60 x 7.50 x 10.20 mm and operate across an industrial temperature range of -40 to +85°C. Features include short circuit protection, over temperature protection, and a mean time between failures (MTBF) of 2 million hours.

Additionally, CUI has improved the ripple and noise performance across the input range to 20-30 mV p-p, this eliminates the need for LC filters on the output in many instances, further reducing board space and BOM cost. The P7805-S series is available immediately with prices starting at $4.38 per unit for 500 pieces through distribution.