The lead customer on this project asked us to develop a replacement regulator module for the obsolete Texas Instruments PT78HT205. The design needed to match the PCB footprint of the old device and be capable of operating under full load in a 65°C ambient while being conformally coated.
After a couple of attempts we came up with this solution based on a synchronous buck regulator device from Micrel in combination with a low resistance LHI inductor from Würth Electronic.
- Output voltage 5V 1%
- Output current 6A max
- Efficiency up to 94.3%
- Input voltage 8-28V
- Vertical or horizontal 5-pin 2.54mm spaced signal pins
- Includes adhesive thermal conductive pad
The regulator can be customised for other voltages such as 1.8V, 2.5V 3.3V. Also a 9A version is possible, if thermal behaviour of the system allows.