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TPS22904: TPS22904 and TPS22902B pin compatibility

Prodigy 170 points

Replies: 4

Views: 100

Part Number: TPS22904

Is the pinout indicated in the datasheets for the two subject parts (TPS22904 and TPS22902B) correct (i.e. mirrored)?  If so, I am looking for a 22904 pin-compatible part with a slower slew-rate.  Any options?

  • Hi Henry,

    Thanks for reaching out on E2E!

    The TPS22904 is one of our older load switches, the only devices that we have that are P2P with this device are the TPS22901 and TPS22902. The TPS22901 / 2 do have a slower slew rate than the TPS22904 (40us @ 1.8V or 220us @ 1.8V).

    Thanks,

    Arthur Huang

  • In reply to Alpha H:

    Arthur,

    Thank you for your response. I am looking at these two datasheets: www.ti.com/.../tps22902.pdf and www.ti.com/.../tps22904.pdf According to page 3 on both, the pinouts do not match: Ball A1 on the 22904 is Vin, while on the 22901/2/2B ball A1 is Vout. In addition, only the 22902B has a 220us slew rate.

    From searching through over a half-dozen TI parts and a few from other manufacturers, it appears that the TPS22904/3 is a one-off part: all of the other load switches I have found use the same pinout as the TPS22901/2/2B.  Can you verify if this is the case?

  • In reply to Henry Lehmann:

    Hi Henry,

    Apologies, you are correct. I've double checked with the design team, and the TPS22903/4 are the only devices that have this configuration. Are you able to switch to a newer device, or have the boards already been produced?

    Thanks,
    Arthur Huang
  • In reply to Alpha H:

    Thanks Arthur! The board has already been built, but we have a made a note to swap the layout when it is revised. I would strongly recommend that TI make a prominent note near the top of the TPS22903/4 datasheet that their pin configuration is unique or make it "not recommended for new designs".

    -Henry

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