

Charge pump
IOT - Ultra tiny 3.3V or 2.5V Step-Up/Step-Down Charge Pump DC/DC Converter
- Size
- 10.2 × 9.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 5
- Nets
- 5
- Pads
- 18
- Tracks, vias
- 34, 4
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 22 Aug 2023
- Updated
- 13 Sep 2023
Overview
Charge pump is an open-source printed circuit board by rmingon, from the rmingon/charge_pump repository on GitHub. It is a 2-layer board of 10.2 × 9.1 mm with 5 parts on 5 nets, routed with 34 tracks and 4 vias.
Its parts include 3 capacitors, 1 IC and 1 connector. It belongs with the home automation and IoT boards of this library.
README
README.mdUltra tiny 3.3V or 2.5V Step-Up/Step-Down Charge Pump DC/DC Converter for IOT based on LTC3240
Thank you to PCBWay for sponsoring the PCB production of this prototype.
This project exist for use IOT device with Alcaline/LIPO battery
PCBWAY WORK

FINISH PROJECT

This device can give 3.3V with 1.8V to 5.5v input without self (see below)
Warning Between 1.8v and 2.5v in input the LTC3240 can give only 40mA

SCHEMATIC VIEW

PCB VIEW

3D VIEW FRONT

3D VIEW BACK

Thank you to PCBWay for sponsoring this project by covering the cost of PCB production for beta. The boards turned out very nicely. The green solder mask looks solid and the grills holes is perfect.
Parts
5| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 1uf | Capacitor_SMD:C_0603_1608Metric | C1, C3 |
| 1 | 4.7uf | Capacitor_SMD:C_0603_1608Metric | C2 |
| 1 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J1 |
| 1 | LTC3240EDC-3_3 | Package_DFN_QFN:DFN-6-1EP_2x2mm_P0.5mm_EP0.61x1.42mm | U1 |
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Questions
How big is the Charge pump PCB?
It measures 10.2 × 9.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Charge pump use?
5 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Charge pump KiCad files?
From the rmingon/charge_pump repository on GitHub, at the commit this page was made from: the board is pcb.kicad_pcb and its schematic pcb.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Charge pump design in my own project?
Its repository states no licence, so its author keeps all rights: ask rmingon before reusing the design.