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Home > Technology List > DC Switching Regulators offer MTBF of 2,000,000 hours.

DC Switching Regulators offer MTBF of 2,000,000 hours.

Update Time: 2019-12-20 12:56:34

DC Switching Regulators offer MTBF of 2,000,000 hours.

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 ideal 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 500 mA and 1 A output current options and have no-load input currents as low as 0.2 mA. Packaged in an ultra-compact, 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), while 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 500 mA series accept a wide range of input voltages up to 4.75 to 36 Vdc, while the 1 A series accommodate input voltage ranges up to 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°C at full load, derating to 60% load at +85°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°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.


  • Product name: VX78-500, VXO78-500, VX78-1000, VXO78-1000
  • Availability: Stock to 10 weeks
  • Possible users: Portable devices, battery-fed equipment, embedded designs
  • Primary features: Compact, high efficiency, pin compatible with LM78XX and LM79XX linear regulators
  • Cost: $2.09 per unit at 100 pieces through distribution

View details for the VX78-500 series:

View details for the VXO78-500 series:

View details for the VX78-1000 series:

View details for the VXO78-1000 series:

About CUI Inc

CUI is an electronic components manufacturer specializing in a diverse range of product technologies. As a leader in power electronics, the organization supports customers as they strive to improve the energy efficiency and environmental credentials of their application. The company’s interconnect, audio, motion and thermal management groups provide engineers with reliable and proven solutions across a range of market segments as technology allows the world to connect in new ways. An unwavering commitment to the design engineer has been a hallmark of CUI’s sustained growth since its founding in 1989 and will continue to be the primary mission as they expand their product technologies, manufacturing capabilities and global reach.

CUI Inc is a subsidiary of CUI Global, Inc., a publicly traded company whose common stock trades on the NASDAQ Exchange under the symbol CUI.



Jeff Schnabel

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