# 12v - 5v converter placeholder ## Description This project involves designing a DC-DC buck converter circuit to efficiently step down a 12V input voltage to a stable 5V output voltage. The converter is suitable for various electronic applications requiring 5V DC supply from a 12V source. ## Project Details - **Owner:** ngfdd - **Created:** 2/19/2025 - **Last Updated:** 4/19/2025 - **Visibility:** Public - **Forks:** 3 ## Key Components ### D1 — [SMBJ28A](https://www.flux.ai/adrian95/smbj28a~3c7.md) - Datasheet URL: https://www.littelfuse.com/~/media/electronics/datasheets/tvs_diodes/littelfuse_tvs_diode_smbj_datasheet.pdf.pdf - Manufacturer Name: Littelfuse Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: SMBJ28A - Part Type: Diode **Pins:** - A [pin 2] - K [pin 1] ### IC1 — [TPS5430DDA](https://www.flux.ai/vasy_skral/tps5430dda~xwm.md) - Manufacturer Name: Texas Instruments - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Integrated Circuit - Manufacturer Part Number: TPS5430DDA - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Ftps5431 **Pins:** - BOOT [pin 1] - EN [pin 5] - GND [pin 6] - GNDPAD [pin 9] - NC [pin 3] - NC [pin 2] - PH [pin 8] - VIN [pin 7] - VSENSE [pin 4] ### J1 — [Connector 01x04 0.100](https://www.flux.ai/vasy_skral/connector-01x04-0100~go.md) - Part Type: Diode **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### J2 — [KF301-5.0-2P](https://www.flux.ai/jecstronic/kf301-50-2p~99i.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: KF301-5.0-2P - Part Type: Connector - Purchase Url: https://www.aliexpress.com/item/32763705634.html?spm=a2g0s.9042311.0.0.27424c4dSDDfMD - Manufacturer Name: Aliexpress **Pins:** - P1 [pin 1] - P2 [pin 2] ### J3 — [B6B-XH-A(LF)(SN)](https://www.flux.ai/adrian95/b6b-xh-alfsn~to0.md) - Manufacturer Name: JST Sales America Inc. - Datasheet URL: https://www.phoenixcontact.com/en-us/products/pcb-header-mstba-25-3-g-508-1757255?type=pdf - Part Type: Connector - Manufacturer Part Number: B6B-XH-A(LF)(SN) - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] ### J4 — [B3B-PH-K-S(LF)(SN)](https://www.flux.ai/adrian95/b3b-ph-k-slfsn~xzb.md) - Part Type: Connector - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: JST Sales America Inc. - Manufacturer Part Number: B3B-PH-K-S(LF)(SN) **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] ### J5 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/jecstronic/b2b-ph-k-slfsn~nss.md) - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Manufacturer Name: JST Sales America - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811151524_JST-Sales-America-B2B-PH-K-S-LF-SN_C131337.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### J6 — [B3B-PH-K-S(LF)(SN)](https://www.flux.ai/adrian95/b3b-ph-k-slfsn~xzb.md) - Part Type: Connector - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: JST Sales America Inc. - Manufacturer Part Number: B3B-PH-K-S(LF)(SN) **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] ### Rpi1 — [Raspberry Pi Pico](https://www.flux.ai/jwace81/raspberry-pi-pico~ib.md) - Datasheet URL: https://datasheets.raspberrypi.com/pico/pico-datasheet.pdf - Manufacturer Name: Raspberry - Manufacturer Part Number: SC0915 **Pins:** - 3V3 [pin 36] - 3V3_EN [pin 37] - ADC_VREF [pin 35] - GND [pin 13] - GND [pin 18] - GND [pin 3] - GND [pin 38] - GND [pin 28] - GND [pin 33] - GND [pin 23] - GND [pin 8] - GP0 [pin 1] - GP1 [pin 2] - GP10 [pin 14] - GP11 [pin 15] - GP12 [pin 16] - GP13 [pin 17] - GP14 [pin 19] - GP15 [pin 20] - GP16 [pin 21] - GP17 [pin 22] - GP18 [pin 24] - GP19 [pin 25] - GP2 [pin 4] - GP20 [pin 26] - GP21 [pin 27] - GP22 [pin 29] - GP26 [pin 31] - GP27 [pin 32] - GP28 [pin 34] - GP3 [pin 5] - GP4 [pin 6] - GP5 [pin 7] - GP6 [pin 9] - GP7 [pin 10] - GP8 [pin 11] - GP9 [pin 12] - RUN [pin 30] - VBUS [pin 40] - VSYS [pin 39] ### U1 — [S-LMBR340FT1G](https://www.flux.ai/lcsc/s-lmbr340ft1g~u03g.md) - Manufacturer Part Number: S-LMBR340FT1G - Manufacturer Name: LRC(乐山无线电) - Package or Case Code: SOD-123FL_L2.7-W1.8-LS3.8-RD - LCSC Part Number: C2972823 - Part Type: Schottky Barrier Diodes (SBD) - JLCPCB Part Class: Extended Part **Pins:** - A [pin 2] - C [pin 1] ### U2 — [DFR0299](https://www.flux.ai/adrian95/dfr0299~dmv.md) - Part Type: Development Board - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: DFRobot - Datasheet URL: https://raw.githubusercontent.com/Arduinolibrary/DFPlayer_Mini_mp3/master/DFPlayer%20Mini%20Manual.pdf - Manufacturer Part Number: DFR0299 **Pins:** - ADKEY1 [pin 12] - ADKEY2 [pin 13] - BUSY [pin 16] - DAC_L [pin 5] - DAC_R [pin 4] - GND [pin 10] - GND [pin 7] - IO1 [pin 9] - IO2 [pin 11] - RX [pin 2] - SPK1 [pin 6] - SPK2 [pin 8] - TX [pin 3] - USB- [pin 15] - USB+ [pin 14] - VCC [pin 1] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/ngfdd/12v-5v-converter-placeholder~gb](https://www.flux.ai/ngfdd/12v-5v-converter-placeholder~gb).* --- *Generated from [https://www.flux.ai/ngfdd/12v-5v-converter-placeholder~gb](https://www.flux.ai/ngfdd/12v-5v-converter-placeholder~gb)*