PM-DB2798S+

The PM-DB2798S+ is a DC-DC converter module manufactured by Holt Integrated Circuits, intended to provide reliable isolated power conversion in high-reliability embedded systems. Built in a compact molded DIP (M-DIP) through-hole package, this converter integrates a high-frequency transformer and control circuitry to deliver one or more regulated, isolated output rails with tight line and load regulation. Typical characteristics of the PM-DB family include fixed-frequency switching for predictable noise spectral content, 1,500 VDC minimum input-to-output galvanic isolation, and integrated protection features such as continuous short-circuit withstand and thermal shutdown. The design supports an extended industrial temperature range and achieves low output ripple without external filtering, addressing the demanding electrical and environmental constraints of mission-critical platforms.

These converter modules are widely deployed in avionics, defense, and industrial controls to generate local isolated rails for MIL-STD-1553 transceivers, ARINC 429 line drivers, and isolated sensor interfaces. They derive multiple voltages from a single system bus, saving board space in distributed architectures. The PM-DB series supports long-lifecycle programs through consistent form/fit and Holt’s disciplined change-control practices, which help mitigate obsolescence risk for deployed platforms. The ‘+’ suffix indicates RoHS compliance; the M-DIP package remains available for through-hole assembly. Procurement teams should verify the exact temperature grade and screening level to match program requirements.