I have a SOT23-3 component marked \$\underline{\textrm{L}}\,\underline{\textrm{E}}\,\overline{\textrm{F}}\,\overline{\textrm{B}}\,\textrm{V}\$ as shown in the following images:
The following schematic snapshot shows the circuitry surrounding the device of interest which is circled in red and referenced as U11:
I thoroughly searched both the web and a number of SMD code databases for information but I haven't been able to come up with anything.
Can you help me to identify the component?
Update: assuming that the component is a MOSFET with Pin1=Gate, Pin2=Source, Pin3=Drain, I've removed it from the PCB and done some probing by using the diode test feature of a digital multimeter (DMM) as follows:
- connecting the positive lead of the DMM to the Source terminal and the negative lead of the DMM to the Drain terminal showed a voltage drop of about 0.57V;
- connecting the negative lead of the DMM to the Source terminal (Pin2) and the positive lead of the DMM to the Drain terminal (Pin3) there is no conduction and it looks like an open circuit, that is the MOSFET is in the OFF state;
- charging the Gate terminal up by touching it with the positive lead of the DMM; now connecting again the leads of the DMM as in 2. results in nearly a short circuit, that is the MOSFET is in the ON state;
So the device looks like to be a N-Channel MOSFET.
Best Answer
It's an IRLML0060TRPbF N-channel MOSFET
Maybe, anyway.
From the International Rectifier (now Infineon) datasheet, it matches your pinout:
And the markings seem very familiar, too:
L̲E̲F̅B̅V (your markings) would make the device:
BVThe only thing that isn't 100% matching up is the overline on the B̅ (first letter of the lot code), I can't find any reference to that in the datasheet.