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TIDA-01469: Issue regarding U4 IC

vishwaranjan pandey
Prodigy 100 points
Part Number: TIDA-01469

With reference to TIDA-10469,after insert battery in battery holder the voltage across C4 ,C10,C9,should be near to battery voltage i.e 3V and the Voltage across C18 should be 3.3V

So as per your design after giving 3V supply to the board i am getting voltage across C10 is 3V ,but across C9 is 1.6V and across C18 is 1.4V .On removing U4(TPS61291DRVR) I am getting voltage across C9 3.0V. so without U4, 3.0V i am getting across C9 

so please help me regarding this. 

  • 0
    TI__Expert 8785 points

    Can you provide more detail on your system setup?

    • Do you have a Launchpad connected?
    • If powering from the battery, did you make sure to remove the jumper to disable the Launchpad's USB power supply and onboard emulator (e.g., remove all jumpers from P4 and P10)?
    • What is the voltage of LS_INT?