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op-amp Vs pin to ground

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go ahead

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i am working on some project and i got stuck at a point .
i have a component that is 5 pin sot smd.

my guess is, op-amp. But the question is why Vs pin of op-amp is connected to ground with some resistance.

needed help in finding component and value of resistance.

as i have searched on google with "5 pin sot op-amp" ,i have found lm7301,lmc7101,ad8541,opa820 and others op-amp are similar to my connection.

i have also searched with "5 pin sot ic" , i have so many voltage regulator, but none of them are suitable for my connections. It also have a voltage regulator 662k , so i think there is need of another.

for device overview, it is 3V button cell operated BLE(Bluetooth low energy) device. and a usb socket is provided for alternate power supply.

thanks in advance :)

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betwixt

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If your connections are right, my guess is 'not an op-amp', more likely a power management IC. What is the code number on it?

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go ahead

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sorry :-(
exactly that thing i m also needed, i have only pcb and that part is named U2. :?:
 
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betwixt

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Doesn't it have a code etched into the top of the device? Usually it is one to three letters or numbers. If you can't see it, try wiping the top of the device with solvent in case the number has become covered by a flux layer.

Brian.
 

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