PCB Design for a VQFN and DFN package soldering practice board using an LDO regulator. The purpose of this project is to give different hobbyists without prior experience with this type of package the opportunity to perform soldering tests to reach a good level of mastery. Soldering can be done for example combining both reflow hot plate and hot air gun.
This project features a power supply circuit centered on the AP7361C (DFN) LDO regulator. It converts a 2.2V to 6.0V input into a stable 3.3V output with ±1% accuracy. To manage power, SW1 (POWER ON) and SW2 (RESET) pulses are debounced by a 74LVC2G14 Schmitt-Trigger inverter (TSSOP6). A 74AHCT32 (VQFN) OR gate creates a latch, while a 74HCT08 (VQFN) AND gate acts as a kill switch to maintain Enable signal only if the latch is active and RESET is not pressed. 2 green LEDs (D1, D2) provide visual feedback status for the +5V and +3V3 rails.
- Input Voltage Range: 2.2V - 6V
- Output Voltage: 3.3V Fixed
- Output voltage accuracy: +-1%
- Max Current: 1.5A
- Layers: 2
- Thickness: 1.6mm
- Width: 45mm
- Heigth: 50mm
KiCad: 9.0.4
This project is certified as **Open Source Hardware**.
The hardware design files are licensed under the **CERN Open Hardware Licence Version 2 - Permissive (CERN-OHL-P-2.0)**.
You may redistribute and modify this documentation and build products based on it under the terms of the CERN-OHL-P v2.0.
All associated documentation, including manuals and images, is licensed under **Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)**.
**This design is provided "AS-IS" without any express or implied warranties.** The author is not responsible for any damage to equipment, fire, or personal injury resulting from the assembly or use of this PCB.