• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 64 subscribers
  • Views 288 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS65311-Q1: Problem in PMIC Buck2/3 and Boost disable

jayasankar bandaru
Prodigy 10 points
Part Number: TPS65311-Q1

Hello,

I am working on a Automotive project and we are using the PMIC TPS65311-Q1 chip for power control.

We are using Buck2/3, Boost and LDO outputs for MCU's and other peripherals. Based on my development experience I have few queries. 

1. When I am trying to set it to LPM0 mode I observed only the LDO is disabled and others are still enabled. Still is there any configuration to be set ?

2. If I wanted to get the latest register value, I need to read twice. First read is to update the latch buffer with register value and the second read is to read the latch buffer.

Is there any configuration we can set, so that I can read the direct register value without latch buffer ?

Thanks in advance.

 

  • 0
    TI__Expert 8730 points

    Hi,

    Have you pulled up  Wake pin to high ( more than ~ 4.5V or so)?

    If so, when you send LPM0 command, device shortly goes to LPM0 and it comes back again as wake is high. In this case, Device comes up again in default mode, I,e LDO is disabled.

    Your register read issue may also be related to this .

    Regards,

    Murthy