RM9XG sot23-5 component

felipeab79 over 1 year ago

Hello, greetings from Auckland NZ.

I am looking for part number of this component installed on pcb board.

I would appreciate if you can guide me to find this component.

Thanks in advance,

Felipe

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felipeab79 over 1 year ago in reply to wolfgangfriedrich +6

Hi, finally I found the right part No. AP7311-ADJ. Thanks again for your guidance. . it is an adjustable regulator sot25.
wolfgangfriedrich over 1 year ago in reply to felipeab79 +3

Great news, that you found the exact part. And thanks for following up and posting the positive result here.

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0 wolfgangfriedrich over 1 year ago

The RM9sE looks like a adjustable linear regulator with standard pinout:

1: input with an input cap to GND

2: GND

3: enable, active high

4: FB, feedback with a resistor divider from output voltage - FB - GND

5: Output with output cap.

As the trace for the output voltage is not very thick it might be a reference voltage, or an analog voltage feed only a few components. If you find other component pins connected to the same net as pin5, they might have better markings for identification that you get at least an idea of the voltage range of the output voltage.

The 2nd, RM9xG could be the same/similar component, just a different layout for input, output caps and feedback resistors.
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0 felipeab79 over 1 year ago in reply to wolfgangfriedrich

I am impressed....thanks a lot for your accurate analysis. terminal 5 sources with power to a group of components. I will check a good controller to define what could be the output voltage.
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0 wolfgangfriedrich over 1 year ago in reply to felipeab79

Cheers. I might have done a layout or two like this before

Important thing is to not route the ENable connection from pin 3 under the chip, because these regulators come in active high and active low enable. Much easier to cut a trance instead of lifting a pin when things are inverted by accident.
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0 felipeab79 over 1 year ago in reply to wolfgangfriedrich

Hi, finally I found the right part No. AP7311-ADJ. Thanks again for your guidance.

. it is an adjustable regulator sot25.
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0 felipeab79 over 1 year ago in reply to wolfgangfriedrich

Hi, finally I found the right part No. AP7311-ADJ. Thanks again for your guidance.

. it is an adjustable regulator sot25.
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0 wolfgangfriedrich over 1 year ago in reply to felipeab79

Great news, that you found the exact part.

And thanks for following up and posting the positive result here.
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