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TPS22929D: TPS22929D

Bumbayar Bumkhuu
Prodigy 10 points
Part Number: TPS22929D

Tool/software:

Hello. I am Bumbayar I am interested in this product TPS22929D

to use it for protecting the power line and stabblize the voltage. I have two questions.

1. I want to know Vin-Vout=ΔV voltage drop and it depends on the on resistor also the load current

 so i need Vin=2.5V and Vout to be as closer to Vin which means I need low voltagedrop ΔV

Could you teach me how much Vout varies from its Typical  vout

  load current=0.05mA

2. I was checking the datasheet and i could not understand what is Iout=-200mA

On what sircumstances this Iout is coming out?

I needed to calculate the  Load current × Max Ron - Load current ×Typ Ron = ΔV　range

and i have my load current but i dont know Ron when Vin=2.5v so i had to calculate 

but dont understand Iout=-200mA

  • 0
    TI__Mastermind 31331 points

    Hello Bumbayar,

    Welcome to E2E. Thank you for choosing TPS22929D.

    Find my response below.

    1. When load switch is ON, the voltage difference between VIN and VOUT will be the drop across the RDSon of the internal MOSFET.

    at VIN=2.5V, typical RDSon is 118 mOhms.

    So, Voltage drop will be RDon*ILOAD .

    2. For the -200 mA test condition I need to check with the characterization test program. The current should be forced to measure the drop and calculate the RDSon.

    I will update in detail later.

    Thanks 

    Amrit 

  • 0 in reply to Amrit Jit
    Prodigy 10 points

    Hello Amrit 

    Thank you for checking the reply.

    Yes  I also think  -200 mA used for testing 

    voltage drop and calculate the RDSon.

    But it s current flow direction is opposide 

    so I was curious.

    Please update in detail later. i ll wait patiently ;)

    Thanks 

    Bumbayar

  • +1 in reply to Bumbayar Bumkhuu
    TI__Mastermind 31331 points

    Hello Bumbayar,

    For load switches, this negative polarity refers to current out of the device (drain to source), so it is a normal operating condition.

    Thanks 

    Amrit 

  • 0 in reply to Amrit Jit
    Prodigy 10 points

    Hello Amrit 

    Thanks for the answer.

    I see so it was current out of the device 

    and load switch needs -200mA to operate normally

    which means it is a Load current  used for the test correct ? 

    Bumbayar

  • +1 in reply to Bumbayar Bumkhuu
    TI__Mastermind 31331 points

    Hello Bumbayar,

    It's the test condition to get the RDSon.

    Device can operate at lower current. There is no min current rating for load switch.

    Thanks 

    Amrit