SLAU969 December 2025
The LP-MSPM33C321A only needs the USB plugged in and debugger jumper block populated to power the device. With the onboard LDO, the 5V USB supply is converted to 3.3V with a supply of 500mA. The LaunchPad can also be powered by the 3.3V or 5V headers via an external supply. Do not exceed 3.3V on the 3.3V rail or 5V on the 5V rail. For operation of the Low-Frequency Subsystem Module (LFSS), the BAT jumper needs to be populated or powered with 1.65 - 3.3V.
Figure 2-2 LP-MSPM33C321A Power
Connections