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LP3874: I'm facing problems to get the desired Vo with LP3874EMP-ADJ/NOPB

Gabriel Reyes
Prodigy 10 points
Part Number: LP3874

Hello, I'm trying to energize a prototype with the LDO LP3874-ADJ. I'm using the following values:

R1 = 24K OHM 0.1% 1/16W (MPN: TNPW040224K0BEED)
R2 = 14K OHM 0.1% 1/16W (MPN: TNPW040214K0BEED)

Cin: (MPN: C0805C106K8RACTU)
Cout: (MPN:TPST106K016H0800)

Appliyig the Datasheet formula the Vo value should be 3.3V, and I'm having the following values

Vin = 5V

Vout = 0.37V

Device Marking: 2CE4 LHKB

Thank you and best regards.

  • 0
    TI__Mastermind 47325 points

    Hi Gabriel,

    That's odd.

    Are you loading the LDO when you measured Vout = 0.37V? Is there a chance the LDO was damaged by reverse current or something before measuring this?

    Regards,
    Nick

  • 0 in reply to Nick Butts
    Prodigy 10 points

    Thank you Nick,

    As you suggested to me I checked every single connection, but for my unfortunate, I found that the library that I downloaded from SnapEDA was wrong:

    It's the first that this happened to me, next time I'm going to check the libraries before manufacture.

    Thak you again and Best regards,

    Gabriel Reyes.