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TMUX1111: Low current power rail switching

Chris Schramm
Intellectual 590 points
Part Number: TMUX1111
Other Parts Discussed in Thread: TS3A4751, TMUX1113

Dear TI-Team,

we're looking for a switch/mux to select 1 of 4 3.6V (max) input rails. The average cont. current will be below 2mA and it is a battery-powered application. Thus, we need a low-drop, low Iq solution.

I came across TMUX1111 which looks goods but it seems to be marketed as a signal switch, not a load switch. Will it fit our application? What about cross conduction?

An alternate which states "Power Routing" in its d/s could be TS3A4751 but it has a max of 3.6V and I don't know if it's okay to hit the max 90% of time

Please advise, I'm also open for alternative parts 

  • 0
    TI__Genius 9132 points

    Hi Chris,

    Thank you for posting on e2e.

    You may use signal switch as a load switch if the current is less than the abs max rating and within the recommended voltage range.

    The TMUX11xx family of devices offer very low on and off leakage currents and low charge injection. The  TMUX1111  is a good choice but for cross conduction, take a look at the TMUX1113  as it exhibits break-before-make switching, allowing the device to be used in cross-point switching applications.

    Based on the details you shared, TMUX1113 would be better option than the TS3A4751 since it has wide operating voltage range (1.08 V to 5.5 V) along with the  break-before-make feature.

    Thanks

    Saminah

  • 0 in reply to Saminah C
    Intellectual 590 points

    Thank you, Saminah!