DC1379A: 3.3V @ 3A, 5.5 ~ 36V in, Inductor On-Chip

Demonstration circuit 1379A demo board featuring the LTM®8025 µModule® is designed to deliver a 3.3V output from a 5.5V to 36V input. The wide input range of the LTM8025 allows a variety of input sources such as automotive batteries, wall adaptors and industrial supplies.

The modes of operation (Burst Mode® operation or synchronization) are jumper-selectable. Burst Mode operation improves efficiency at light loads. The LTM8025 can be synchronized over a 250kHz to 2MHz range.

The current mode control scheme creates fast transient response and good loop stability. The RUN/SS pin can be used to set the part in micropower shutdown mode, reducing the supply current to less than 1µA. The RUN/SS pin can also be used to program soft-start. In this mode, the RUN/SS pin is driven through an external RC filter to create a voltage ramp on this pin reducing the input current surge during start-up.