Utilising 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 suitable 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 0.2mA. Packaged in an ultra-compact, 3 pin SIP footprint, the encapsulated models measure just 0.45×0.29×0.40” (11.60×7.55×10.16mm), while the open frame models have even smaller dimensions of 0.39×0.28×0.43” (10.00×7.20×11.00mm).
The 500mA series accept a wide range of input voltages up to 4.75-36VDC, while the 1A series accommodate input voltage ranges up to 6-36VDC. Nominal output voltages of 3.3, 5, 9, 12, or 15VDC, 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.
