Tool/software:
Hello, I’m using a TPS7A0233PDBVR LDO to generate 3.3 V from either a Li-ion battery or USB 5 V for a GPS/LoRa tracker. Below is my power‐section schematic:
Before soldering, I measured the input pads—pin 1 (IN) and pin 3 (EN)—and both read 5 V with no battery connected. However, once the TPS7A0233PDBVR was soldered in place, it overheats within seconds and never regulates to 3.3 V.
Here is my PCB layout:
At the center is the TPS7A0233PDBVR. I’m very new to PCB design, and my schematic and layout may not be optimal—any advice would be greatly appreciated.
I previously used the AMS1117, but its high dropout voltage makes it unsuitable for my battery-powered project. Is the TPS7A0233PDBVR a good fit for my needs? If not, which LDO would you recommend?