| No | Part number | Description ( Function ) | Manufacturers | |
| 2 | A722 | PNP Transistor - 2SA722
|
 ETC |
|
| 1 | A7220 | 2A SYNCHRONOUS STEP-DOWN CONVERTER AiT Semiconductor Inc. www.ait-ic.com A7220 DC-DC CONVERTER BUCK (STEP-DOWN) 4.3V TO 18V INPUT, 2A SYNCHRONOUS STEP-DOWN CONVERTER WITH FAST TRANSIENT RESPONSE DESCRIPTION The A7220 is a current mode synchronous buck converter, and has a proprietary W-mode™® Gm curvature circuit that enables fast transient response, enables the device to adopt to both low ESR output cap |
 AiT Semiconductor |
|
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List of most widely used semiconductors
| Part Number | Function | Manufacturers | |
| 1N4007 | The 1N4007 is a rectification diode that is designed for high-voltage applications, typically up to 1000V. It has a maximum current rating of 1A and a forward voltage drop of around 0.7V. |
 Vishay |
|
| LM317 | This is a popular adjustable voltage regulator. |
 ON Semiconductor |
|
6N137 | LM393 | 2N3906 | 2N2222 | TIP120 | 1N5818 | LM324N | A1015 | SMAJ20CA |
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