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Std EditionBUCK TO-220 Replacement

License: Public Domain

Published Time:2019-05-09 10:56:26
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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

Documents

BUCK_TO-220_SCH

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BUCK_TO-220_PCB

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ID Name Designator Footprint Quantity
1 10uH L1 SM5845 1
2 P1 P1 HDR-3X1/2.54 1
3 OSHW-LOGOS LOGO1 OSHW-LOGO-S 1
4 ME3116 U1 SOT23-6 1
5 0.47uF C3 0805 1
6 10uF CI,CBOOST,CO 0805 3
7 SS34-E3/57T D1 SMC(DO-214AB) 1
8 10.7k R1 0805 1
9 2k R2 0805 1
10 1.2m R3 0805 1

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