Hi,
I'm using HT7150-3 inside a circuit to lower my output voltage into 5V and return a feedback to circuit.
The HT7150-3 that I ordered is an SMT part which is soldered to the circuit, and placed through easyEDA software.
To its input I drive about 12V, and get the same at the output for some reason.
I replaced it with a LM7805 and the circuit worked correctly, and had an output of 5V, so I know the problem is there.
I suspect that I didn't wire it correctly(which is a bit unlikely because i took it from a library and double check a few times), or maybe too much current flowing through it? I have added the schematic, PCB and its HT7150 data sheet.
Thanks
HT71xx-3_Holtek.pdf (930 KB)
Hi,
Your PCB.
Have you checked the pinout of the SMD reg?
Here I have put the pin names onto your PCB pattern, your PCB tracks go to the wrong pins of the SMD.
You appear to have SMD Vin goes to the Vout PCB terminal and Vout of the SMD goes "somewhere".
Tom... 
Hi, thanks for the answer.
The names are a bit confusing but the Vout connected to Vin of the regulator is ok and that's what supposed to be(it's a feedback to the rest of the circuit).
Hi,
Okay so if you explain yourself properly, this is a charging circuit?
Vout is actually the Vin for this circuit.
- How many threads do you have going on this forum?
- Are they all to do with one project?
- How about you get ONE aspect of your project fixed first and not try half a dozen different threads about the one project all at once?
- Are you trying to make your own Pro Mini.
Tom..
Hi,
This is a on/off button circuit, that passes Vin to Vout through a soft button press , and works ok with another regulator(7805) - I'm trying to figure out why.
I'm working on other unrelated projects as well, including the arduino pro mini that is fine now
Thanks
