Electronics > Repair

FRsky Rx died - need help identifying SMD component

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enut11:
This FRsky RC receiver died after connecting it to a variable power supply. It is rated for 5-10vDC. I believe I did not apply more than this but the power supply (Korad 3005) may have spiked when adjusting the rotary output.
Anyway, there is now a short between the +pins and ground and it may be due to U2 (33942) 4-pin device. I need help in identifying what U2 is and the chip pin assignments.
enut11

fzabkar:
I suspect that it's a 3.3V LDO regulator. The datasheets for the other two ICs may give you a clue (Vcc).

u666sa:
Linear voltage regular, 4 volts, 400 mah

adam7:
It is  LDK320ADU33R SOT-89-3

fzabkar:
https://es.aliexpress.com/w/wholesale-LDK320ADU33R.html (photos)

https://www.st.com/resource/en/datasheet/ldk320.pdf (datasheet)

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