# Buck Converter ## Description MP1584-Based 3.3 V/3 A Buck Converter with Integrated ESP32-WROOM-32E and Dual-Row Expansion Headers ## Project Details - **Owner:** collinsemasi - **Created:** 10/23/2024 - **Last Updated:** 10/23/2024 - **Visibility:** Public - **Header Connector Style:** dual-row 2x19 - **System Architecture:** ```mermaid flowchart TD Input12V[Input 12 V] --> MP1584[MP1584] MP1584 --> Rail3V3[3.3 V rail] Rail3V3 --> ESP32[ESP32-WROOM-32E\nEN pull-up resistor\n100nF decoupling capacitor] ``` - **Max Output Current:** 3A - **Max Output Voltage:** 3.3V - **Max Input Voltage:** 20V - **Inductor/Diode Tuning Approved:** approved - **Forks:** 1 - **Copies:** 2 ## Key Components ### CN1 — [X2530WR-2x19-PTSN](https://www.flux.ai/lcsc/x2530wr-2x19-ptsn~fr7i.md) - Manufacturer Name: XKB Connection(中国星坤) - Part Type: Wire To Board / Wire To Wire Connector - JLCPCB Part Class: Extended Part - Manufacturer Part Number: X2530WR-2x19-PTSN - Role Details: GPIO expansion header for ESP32-WROOM-32E - LCSC Part Number: C2882631 - Package or Case Code: CONN-TH_38P-P2.54_XKB-CONNECTIVITY_X2530WR-2X19-PTSN - Role: Connector **Pins:** - 1 [pin 1] - 10 [pin 10] - 11 [pin 11] - 12 [pin 12] - 13 [pin 13] - 14 [pin 14] - 15 [pin 15] - 16 [pin 16] - 17 [pin 17] - 18 [pin 18] - 19 [pin 19] - 2 [pin 2] - 20 [pin 20] - 21 [pin 21] - 22 [pin 22] - 23 [pin 23] - 24 [pin 24] - 25 [pin 25] - 26 [pin 26] - 27 [pin 27] - 28 [pin 28] - 29 [pin 29] - 3 [pin 3] - 30 [pin 30] - 31 [pin 31] - 32 [pin 32] - 33 [pin 33] - 34 [pin 34] - 35 [pin 35] - 36 [pin 36] - 37 [pin 37] - 38 [pin 38] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] - 7 [pin 7] - 8 [pin 8] - 9 [pin 9] ### CN2 — [X2530WR-2x19-PTSN](https://www.flux.ai/lcsc/x2530wr-2x19-ptsn~fr7i.md) - Package or Case Code: CONN-TH_38P-P2.54_XKB-CONNECTIVITY_X2530WR-2X19-PTSN - Role Details: Expose ESP32-WROOM-32E GPIOs - Part Type: Wire To Board / Wire To Wire Connector - Manufacturer Name: XKB Connection(中国星坤) - Role: Connector - JLCPCB Part Class: Extended Part - Manufacturer Part Number: X2530WR-2x19-PTSN - LCSC Part Number: C2882631 - Package: CONN-TH_38P-P2.54_XKB-CONNECTIVITY_X2530WR-2X19-PTSN **Pins:** - 1 [pin 1] - 10 [pin 10] - 11 [pin 11] - 12 [pin 12] - 13 [pin 13] - 14 [pin 14] - 15 [pin 15] - 16 [pin 16] - 17 [pin 17] - 18 [pin 18] - 19 [pin 19] - 2 [pin 2] - 20 [pin 20] - 21 [pin 21] - 22 [pin 22] - 23 [pin 23] - 24 [pin 24] - 25 [pin 25] - 26 [pin 26] - 27 [pin 27] - 28 [pin 28] - 29 [pin 29] - 3 [pin 3] - 30 [pin 30] - 31 [pin 31] - 32 [pin 32] - 33 [pin 33] - 34 [pin 34] - 35 [pin 35] - 36 [pin 36] - 37 [pin 37] - 38 [pin 38] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] - 7 [pin 7] - 8 [pin 8] - 9 [pin 9] ### D1 — [MBRA340T3G](https://www.flux.ai/vasy_skral/mbra340t3g~p1.md) - Current Rating: 3A - Manufacturer Part Number: 1N5824 - Datasheet URL: https://www.onsemi.com/pdf/datasheet/mbra340t3-d.pdf - Part Type: Diode - Diode Type: Schottky - Max Reverse Voltage: 30V - Manufacturer Name: onsemi **Pins:** - A [pin 2] - K [pin 1] ### D1 — [SS34](https://www.flux.ai/collinsemasi/ss34~qf.md) - Manufacturer Name: NextGen Components Inc - Manufacturer Part Number: SS34 - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/5335/SMASS340000S34.pdf **Pins:** - ~ [pin A] - ~ [pin C] ### J1 — [TerminalBlock-01x02P-3.50mm](https://www.flux.ai/vasy_skral/terminalblock-01x02p-350mm~mcc.md) - Part Type: Connector **Pins:** - P1 [pin 2] - P2 [pin 1] ### J2 — [TerminalBlock-01x02P-3.50mm](https://www.flux.ai/vasy_skral/terminalblock-01x02p-350mm~mcc.md) - Part Type: Connector **Pins:** - P1 [pin 2] - P2 [pin 1] ### U1 — [LM2596DSADJR4G](https://www.flux.ai/adrian95/lm2596dsadjr4g~ly6.md) - Datasheet URL: https://www.onsemi.com/pdf/datasheet/lm2596-d.pdf - Manufacturer Part Number: LM2596DSADJR4G - Part Type: Integrated Circuit - Manufacturer Name: onsemi - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - ~ON~/OFF [pin 5] - EPAD [pin 6] - FB [pin 4] - GND [pin 3] - OUT [pin 2] - VIN [pin 1] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/collinsemasi/buck-converter~sm](https://www.flux.ai/collinsemasi/buck-converter~sm).* --- *Generated from [https://www.flux.ai/collinsemasi/buck-converter~sm](https://www.flux.ai/collinsemasi/buck-converter~sm)*