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TPS65131: large consumer current in shutdown mode

Timofey Zakharov
Prodigy 10 points
Part Number: TPS65131

Hello!

Please help me with such trouble. TPS65131RGE consumes a large current (1.4 mA) in shutdown mode. 

Negative channel is don't used. Pins 2,3,5,6,9,10,11,16,19 are grounded. Pin 8 grounded by resistor 4.7 kOhm. Inductance L1 to pins 1,24 disconnected. Pins 7,13,14,15,18,20 disconnected. Connected to power only pin 4 and consumer current is approximately 1.4 mA. 

What I do wrong? How to decrease current in shutdown mode to 1 uA look like in datasheet?

  • +1
    TI__Mastermind 18550 points

    Hello,

    We normally have both boost and inverting converter completely wired up with all components when measuring shutdown current with ENP/ENN tied to GND so the larger current likely has something to do with different connectivity (open pins or connected to GND). This may require wiring un-connected circuits one by one to determine the cause of extra current. Is it possible to do that on your board? You may start out by connecting INN and INP pins first.

    Kind Regards,

    Liaqat

  • 0 in reply to Liaqat Khan
    Prodigy 10 points

    Thank you very much for helping!

    Disconnecting pins 5, 6 from GND has resolved problem.