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TPS50601A-SP: SYNC pin maximum output current

Alex Driskell
Prodigy 60 points
Part Number: TPS50601A-SP

Hello,

The primary goal of this post is to determine what a safe limit is on the output current for the SYNC pin on the TSP50601A-SP when in internal oscillator mode. I'm mainly concerned about this during startup before an external clock has been present for 20 us, but also interested in what would be safe for leaving the device in internal oscillator mode for extended periods.

The datasheet (Rev D) doesn't list anything for this in the Absolute Maximum Rating section, and only gives a recommended 10 kOhm load for internal oscillator mode. This implies an output current of under 1 mA given an input voltage in the range of 3 V to 7 V. Would a lower load resistance of say 500-1000 Ohms or even lower, or an output current of up to 10-20 mA, be safe for this mode without affecting device reliability? If not, what is a recommended upper bound on the output current?

Thanks,

Alex Driskell

  • 0
    TI__Genius 14540 points

    Hi Alex,

    We actually do recommend a lower pulldown resistance on the SYNC pin to mitigate single event effects.  If you look at the schematic in the published SEE report for this device, you will see a 910ohms pulldown resistance was used.  Updating the datasheet to be consistent with this document is on the list of updates to be done.

    Thanks

    Christian