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LP8340: Low Iq LDO selection

Kevin Xiong
Expert 2340 points
Part Number: LP8340

Hi,

Our customer wants LDO, the requirement is:

1. input voltage range is: 3V ~ 7V

2. output voltage will be adjustable or fixed voltage: 3.8V, 3.9V or 4.0V

3. the load current is 500mA

4. the Iq is less than 3uA

I select LP8340, but it's Iq is 19uA which does not match the requirement. So could you please help select the most suitable LDO for our customer?

Kevin Xiong

  • 0
    TI__Expert 4320 points
    Hi Kevin,

    Unfortunately that is the most suitable LDO with those requirements. I was wondering what was particularly driving the Low Iq requirement? Is your customer's application something that is battery powered? I ask because you will save more battery power if you were to put a buck/boost in front of the LDO in order to drive it to a 5V rail and then use an LDO to drop it to 3.8V to 4V.

    Best Regards,
    Wilson
  • 0 in reply to Wilson Fwu
    Expert 2340 points
    Hi Wilson,

    Thank you for your reply. The customer uses batttery for his system and he don't want to use DC-DC.
    Anyway, he said he will think about this part.
    Thanks again.

    Kevin Xiong