# stackripper-psu-18650 ## Description Power supply for 3.3V from a two 18650 batteries ## Project Details - **Owner:** odrusso - **Created:** 5/20/2024 - **Last Updated:** 5/20/2024 - **Visibility:** Public ## Key Components ### 3V3_OUT — [S2B-PH-K-S](https://www.flux.ai/jecstronic/s2b-ph-k-s~2tt.md) - Manufacturer Part Number: S2B-PH-K-S - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - Manufacturer Name: JST Sales America Inc. **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### B1 — [BK-18650-PC2](https://www.flux.ai/vasyl/bk-18650-pc2~kg2.md) - Voltage: 4.2V - Manufacturer Part Number: BK-18650-PC2 - Datasheet URL: https://www.memoryprotectiondevices.com/datasheets/BK-18650-PC2-datasheet.pdf - Manufacturer Name: MPD (Memory Protection Devices) **Pins:** - NEGATIVE [pin -] - POSITIVE [pin +] ### B2 — [BK-18650-PC2](https://www.flux.ai/vasyl/bk-18650-pc2~kg2.md) - Manufacturer Name: MPD (Memory Protection Devices) - Datasheet URL: https://www.memoryprotectiondevices.com/datasheets/BK-18650-PC2-datasheet.pdf - Voltage: 4.2V - Manufacturer Part Number: BK-18650-PC2 **Pins:** - NEGATIVE [pin -] - POSITIVE [pin +] ### DIODE — [1N5819HW-7-F](https://www.flux.ai/jecstronic/1n5819hw-7-f~x5v.md) - Part Type: Diode - Manufacturer Name: Diodes Incorporated - Datasheet URL: https://www.diodes.com/assets/Datasheets/ds30217.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: 1N5819HW-7-F **Pins:** - A [pin 2] - K [pin 1] ### LDO — [AZ1117CR-3.3TRG1](https://www.flux.ai/jecstronic/az1117cr-3p3trg1~tdk.md) - Manufacturer Name: Diodes Incorporated - Datasheet URL: https://www.diodes.com/assets/Datasheets/AZ1117C.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: AZ1117CR-3.3TRG1 - Part Type: Power Management **Pins:** - ADJ/GND [pin 1] - INPUT [pin 3] - OUTPUT [pin 2] - VOUT [pin 4] ### PFET — [AO3401A](https://www.flux.ai/jecstronic/ao3401a~9r5.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: HUASHUO - Part Type: Transistor - Datasheet URL: https://datasheet.lcsc.com/lcsc/2007171935_HUASHUO-AO3401A_C700954.pdf - Manufacturer Part Number: AO3401A **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### UVLO — [TPS3702AX18DDCT](https://www.flux.ai/vasy_skral/tps3702ax18ddct~uwe.md) - Datasheet URL: https://www.ti.com/lit/ds/symlink/tps3702.pdf - Manufacturer Name: Texas Instruments - Part Type: Integrated Circuit - Manufacturer Part Number: TPS3702AX18DDCT **Pins:** - GND [pin 2] - OV [pin 6] - SENSE [pin 3] - SET [pin 4] - UV [pin 1] - VDD [pin 5] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/odrusso/stackripper-psu-18650~9p](https://www.flux.ai/odrusso/stackripper-psu-18650~9p).* --- *Generated from [https://www.flux.ai/odrusso/stackripper-psu-18650~9p](https://www.flux.ai/odrusso/stackripper-psu-18650~9p)*