Notes on power supply circuits for Arduinos, Raspberry Pis, ESP32s, and other 5V/3.3V devices
| Image | Description | Chipset | Switching Frequency | Pot. Adj. | Fixed Adj. | PCB Mountable | Notes | Link |
|---|---|---|---|---|---|---|---|---|
| CA1235 module | MP1495 | 500kHz | -------------- | -------------- | Adjustable voltage output selectable by pot or solder joints. Can't be PCB mounted. | https://www.aliexpress.com/item/1005005231661753.html | ||
| "Mini" | -------------- | -------------- | -------------- | Adjustable (need knife to break trace) | https://www.aliexpress.com/item/4000016739581.html | |||
| MP1584EN | MP1584 | 1.5MHz | -------------- | -------------- | Pot adjustment only | |||
| QSKJ "Fine" | MP2315 | 500Khz | -------------- | -------------- |
| | XL1509 | 150kHz |||
NOTE: Neither 1584 or 1495 are recommended for new designs. Instead MP2338 recommended instead.
MP1584 not recommnded for new designs MP2338 recommended instead. MP2315 not recommended for new designs. MP2393 suggested alternative instead.
Higher switching frequency will mean less ripple on the output (more accurate voltage/current) but causes more overhead due to switching, which reduces the efficiency a bit.
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