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CUI’s Power Group today announced the addition of four new series to its family of non-isolated dc switching regulators. The next generation VX78-500, VXO78-500, VX78-1000, and VXO78-1000 series are extremely efficient, typically up to 96%, and balance maximizing economy while delivering a high level of performance as a direct alternative to using linear regulators.
Utilizing switching technology, the models are footprint compatible with TO-220 package LM78XX and LM79XX model regulators and unlike linear regulators do not require a heat sink. This makes them suited for use in portable devices, battery-fed equipment, and embedded designs where board space is at a premium and energy efficiency is a concern.
The encapsulated VX78 series and open frame VXO78 series, suited for positive- or negative-output applications, both offer 500mA and 1A output current options and have no-load input currents as low as 0.2 mA. Packaged in a 3-pin SIP footprint, the encapsulated models measure just 0.45 x 0.29 x 0.40 in (11.60 x 7.55 x 10.16 mm). The open frame models have even smaller dimensions of 0.39 x 0.28 x 0.43 in (10.00 x 7.20 x 11.00 mm).
The 500mA series accept a wide range of input voltages from 4.75- to 36-Vdc, while the 1A series accommodate input voltage from 6- to 36-Vdc. Nominal output voltages of 3.3-, 5-, 9-, 12-, or 15-Vdc, are also available depending upon the series. Operating temperatures for all models range from -40 up to +71 degrees C at full load, derating to 60% load at +85 degrees C.
These non-isolated dc-dc converters also feature low ripple and noise, continuous short circuit protection, and UL 60950-1 and CSA safety certifications, along with the CE mark. All models carry a minimum MTBF of 2,000,000 hours at +25 degrees C ambient, calculated per MIL-HDBK-217F.
The VX78-500, VXO78-500, VX78-1000, and VXO78-1000 series are available immediately with prices starting at $2.09 per unit at 100 pieces through distribution. Please contact CUI for OEM pricing.
