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STD BUCK TO-220 Replacement
BUCK TO-220 Replacement
License
Public Domain
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Update time：
2024-08-20 20:56:40
Creation time：
2019-05-09 02:56:26
Description
Description
This is a reverse engineering of the DD4012SA 5v buck regulator for replacing LM7805 TO-220 regulators.
ME3116 is the IC, https://datasheet.lcsc.com/szlcsc/Nanjing-Micro-One-Elec-ME3116_C97643.pdf
R2 = 2K for all Voltages
3.3V R1 = 6.34k
5V R1 = 10.7K
12V R1 = 28.7k
To Calculate other output voltages: Vout = Vfb(1+(R1/R2))
Vfb = 0.8v
R2 = 2000
Design Drawing
Design Drawing
schematic diagram
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| ID | Name | Designator | Footprint | Quantity | |
|---|---|---|---|---|---|
| 1 | 0.47uF | C3 | 0805 | 1 | |
| 2 | 10uF | CBOOST,CI,CO | 0805 | 3 | |
| 3 | SS34-E3/57T | D1 | SMC(DO-214AB) | 1 | |
| 4 | 10uH | L1 | SM5845 | 1 | SMD Power Inductor WE-PD2, L |
| 5 | P1 | P1 | HDR-3X1/2.54 | 1 | |
| 6 | 10.7k | R1 | 0805 | 1 | |
| 7 | 2k | R2 | 0805 | 1 | |
| 8 | 1.2m | R3 | 0805 | 1 | |
| 9 | ME3116 | U1 | SOT23-6 | 1 |
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