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Original question:

TPS62933: simulation not enable for this design

TPS62933: Problems with reference circuits

yuhsiang Chen
Prodigy 10 points

Part Number: TPS62933

Using the reference circuit on the datasheet, I was able to get 5V output voltage on the first power up. However, after the second power up, I could no longer get 5V output voltage.The input voltage is the correct 8 V.
I also checked all resistors and capacitors except the TPS62933 for correctness.

I'm not sure if I'd have a problem driving both TPS62933's from the same 8v power supply.

Below is circuit schematic

  • 0
    TI__Mastermind 31156 points

    Hi Yuhsiang

    The EN should be larger than the VEN_rise to enable the device, which you check in the datasheet is 1.21V. 

    Please adjust R86 and R87 to set EN>1.28V when Vin=8V. (Please note that EN should not be larger than 5.5V)

    Thanks and best regards.