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TPS7A10: low Vout LDO

Given Ding
Expert 8815 points
Part Number: TPS7A10
Other Parts Discussed in Thread: TPS7A05

Hi Team,

my customer is searching for 0.5V/0.6V fixed Vout LDO device. I see there is TPS7A1x series which can support the voltage. 

since application is wearable which care much on Iq.  Device like TPS7A05 is used before which has ~1uA Iq, but TPS7A1x has much larger Iq, so I have questions.

1. it seems there is Vbias for such low Vout,  is it because low Vref bandgap need higher voltage to make internal circuit work？

2. Iq for Vbias and Vin are much larger compared with TPS7A05, what's the reason for this？

Thanks. 

BRs

Given 

  • +1
    TI__Mastermind 18466 points

    Hey Given, 

    1. Typically with a low VOUT, a low VIN is being used. This device supports very low input voltages with the use of an additional VBIAS rail that is used to power the internal circuitry of the LDO.

    2. Iq is the minimum amount of current the LDO's internal circuitry will consume to maintain regulation. These devices have different internal circuitry. 

    I can forward this to a marketing engineer if you would like a second opinion on device selection for your application. 

    Best, 

    Juliette

  • 0 in reply to Juliette
    TI__Expert 8815 points

    Hi Juliette, 

    thanks for your reply. I'm not sure if there is other  device can be recommended. Thanks. 

    BRs

    Given