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TS5A2066: high power consumption issue (almost 1mA)

Part Number: TS5A2066
Other Parts Discussed in Thread: LSF0102


So I designed my low power board and I discovered that the TS5A2066 circuit consume a lot of current. When I tried to de-solder the TS5A2066 circuit from my board the current consumption dropped to a normal value. The current dropped 1mA.

So I have a microntroller which works with 2.5v volts and I have two signal that the microcontroller should read, but these signal use directly the battery voltage and have a higher voltage of a 3.3V and can reach 4.2v all depend on the battery level.

this is why I used the TS5A2066 circuit , in order to convert the 3.3v-4.2v to a 2.5v thus the microcontroller can read it.

Here's the schematic of the circuit that I made.

So as you can see I use for the circuit power supply 'V+' the battery voltage, which can vary from 3.2v to 4.2v all depend on the battery level.

The signal CHARGER_STAT and VinOK are the two signals that I want to convert their level. These two signal use the same voltage level as the V+ which is the battery voltage.

In the two COM pins I put the 2.5v regulated voltage  which is the same voltage that the microcontroller use.

And finally the NO pin I connect them to the microcontroller.

I don't know if I forgot something, or something is wrong here but the circuit consume a lot of current as it supposed to be.

In addition of that I think that the circuit behavior is not correct.

I'm wondering if I had to switch between the NO et COM pins ? The COM pin should be connected to the microcontroller and the NO pins should be connected to the 2.5v ?

is the current orientation matter in this circuit ?

please give me suggestion to get rid of this issue


  • Chamkhi,

    You are correct the low power TS5A2066 should not consume 1mA through the V+ pin.  Typically we expect the current consumption to be 100nA.

    The signal you are trying to communicate to the microcontroller should be on the NO or COM lines of the TS5A2066 device.  The IN1 and IN2 pins are digital control signal to tell the IC to open or close the switch.   

    I think you are using the wrong device for what you are trying to implement.  This device has a transmission gate type structure (NMOS parallel with PMOS) and will not level shift your signal like a single NMOS switch would like SN74CB3TXXXX family.  I would recommend using a level shifter like the LSF0102. 

    I'm going to move this thread to the level shifters forum for more assistance.

    Thank you,