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Original question:

MSPM0L1228: Shutdown Mode Current Consumption – 100 µA Measured

MSPM0L2228: High Shutdown Current (~3 mA) observed using sysctl_shutdown example on LaunchPad

Daniel Cheng1
Mastermind 8385 points

Part Number: MSPM0L2228

Hi TI Team,

I am evaluating the Shutdown mode current consumption on the LP-MSPM0L2228 LaunchPad using the SDK example project sysctl_shutdown.syscfg. However, I am measuring a current consumption of approximately 3 mA in Shutdown mode, which is significantly higher than expected.

Here is my hardware setup for the current measurement:

  • Removed the 3V3 jumper in the J101 isolation block.

  • Connected an ammeter in series across the 3V3 jumper pins on J101.

Could you please review my setup and advise if I am missing any hardware/isolation steps or software configurations?

Specifically:

  1. Are there any other jumpers on J101 (such as SWD/JTAG lines, UART, or backchannel XDS110 connections) that need to be removed to prevent back-powering or leakage current through the debug probe?

  2. Are there any default onboard peripherals or pull-up/pull-down resistor paths on the LP-MSPM0L2228 that could contribute to this ~3 mA current draw in Shutdown mode?

l2.png

 

Thanks and best regards,

 

Daniel