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TPS62112: Right boost converter for hall effect sensor and eventually 3.3V logic

Markovicz
Prodigy 220 points
Part Number: TPS62112
Other Parts Discussed in Thread: TPS61070

Dear Texas-Team,

I am searching for a boost converter to power the honey well SS495X-series of hall effect sensors:

sensing.honeywell.com/SS495A-S-linear-and-angle-sensor-ics

That at minimum need an input voltage of 4.5V (7.0mA supply current at 5V supply voltage). I have thought about using a TPS62112 that should do the job.

II would be happy if you took a look at following questions:

- Can you recommend a boost converter that serve as a supply voltage for sensors? I guess the ripples should be quite low.

- My project should run on a lithium 3.0V coin cell, either the standard CR 2032 with a diameter of 20mm or the CR 1225 with a diameter of 12mm.

- I am also considering to use a LR 44 button cell with the same diameter as the CR1225 but 3x capacity. Then, I might need a boost converter for 3.3V and for 5.0V or: I just boost up to 5.0V and use 2xdiodes. What do you think about that?

Thank you and best!

  • 0
    TI__Guru**** 191445 points

    Markovicz,

    TPS62112 is a step down buck converter.  It will not work for you.  Unfortunately, this forum post will only be viewed by buck converter support.  You might look at TPS61070.  You can also re-post in the appropriate forum.