TVS Diode D2 Overview
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Below is a recommended set of components that you could use to design a DC‑DC Buck Converter circuit to convert +12 V to +5 V. One common approach is to use a switching regulator IC (such as the LM2596) along with its supporting passive components. See the table below:
Table
| Component | Description | Suggested Part/Link |
|---|---|---|
| Buck Converter IC | A widely used switching regulator for step‑down (buck) conversion. It regulates the output voltage by switching an internal transistor at high frequency. | LM2596 |
| Inductor | The inductor stores energy during the switching cycle. Typical values range between 33 µH to 100 µH depending on the design, load current, and frequency. | 33µH Inductor (or choose a value based on your design requirements) |
| Schottky Diode | Provides a fast recovery path for the inductor current during the off cycle with a low forward voltage drop. | 1N5822 (or another suitable Schottky diode rated for your expected current and voltage) |
| Input Capacitor(s) | Helps reduce the input voltage ripple and filter out high‑frequency noise from the 12 V source. A combination of electrolytic (high capacitance) and ceramic (low ESR) is common. | 100µF Capacitor (add a ceramic capacitor in parallel to improve filtering) |
| Output Capacitor(s) | Stabilizes the output voltage and minimizes voltage ripple on the 5 V rail. Low‑ESR capacitors are generally recommended. | 100µF Low ESR Capacitor (choose a value as specified by the regulator’s datasheet) |
- Design Considerations:
- Check the LM2596 datasheet for typical application circuits. The datasheet will provide recommended values and additional guidance for improved performance (e.g., selecting the proper inductor and capacitance values based on load current and switching frequency).
- Ensure that all parts are rated for the worst‑case conditions in your design.
- Common Application:
- This configuration is frequently used in designs where efficiency is paramount and where the power loss of an LDO would be excessive.
- Schematic Integration:
- Once the components are selected, you would place them in your schematic as a DC‑DC buck converter module. The converter’s output should be connected to your +5 V power net in your project, ensuring that it serves as the sole source (or is OR‑ed properly with any existing 5 V source to avoid contention).
You can use the links provided to search the Flux library for each component and add them to your project. If you need help with wiring the schematic for the buck converter or further tuning the supporting component values based on the regulator’s datasheet recommendations, let me know!
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D2
GPIO36
D1
C4
Capacitance
10u F
ESP_RX
+3V3
CC1
GPIO18
VBUS
R1
Resistance
Resistance
Resistance
10k Ω
+3V3
GPIO15
GPIO14
C8
Capacitance
10u F
ESP_TX
GPIO21
PWR
GPIO34
GPIO25
CC2
ESP_IO0
R2
Resistance
Resistance
Resistance
5.1k Ω
USBDN
+3V3
C9
Capacitance
10u F
ESP_IO0
GPIO22
C6
Capacitance
0.1u F
C7
Capacitance
0.1u F
USB1
GPIO16
R4
Resistance
1k Ω
Q1
GPIO5
R3
Resistance
Resistance
Resistance
5.1k Ω
+5V
USBDP
GPIO13
GPIO17
GPIO12
U2
GPIO35
GPIO33
C5
Capacitance
10u F
USBDN
ESP_RX
+3V3
C2
Capacitance
0.1u F
C1
Capacitance
0.1u F
VBUS
GPIO4
USBDN
USBDP
U1
+5V
GPIO2
GPIO26
+3V3
CC2
GPIO39
GPIO19
+3V3
GPIO32
ESP_TX
ESP_EN
IC1
GPIO23
Q2
GPIO27
ESP_EN
+3V3
USBDP
Reviews
- Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portaljharwinbarrozo43.0M
- Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #powerjharwinbarrozo11.4M
- A generic fixed resistor for rapid developing circuit topology. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0Ω 10Ω 100Ω 1.0kΩ 10kΩ 100kΩ 1.0MΩ 1.1Ω 11Ω 110Ω 1.1kΩ 11kΩ 110kΩ 1.1MΩ 1.2Ω 12Ω 120Ω 1.2kΩ 12kΩ 120kΩ 1.2MΩ 1.3Ω 13Ω 130Ω 1.3kΩ 13kΩ 130kΩ 1.3MΩ 1.5Ω 15Ω 150Ω 1.5kΩ 15kΩ 150kΩ 1.5MΩ 1.6Ω 16Ω 160Ω 1.6kΩ 16kΩ 160kΩ 1.6MΩ 1.8Ω 18Ω 180Ω 1.8KΩ 18kΩ 180kΩ 1.8MΩ 2.0Ω 20Ω 200Ω 2.0kΩ 20kΩ 200kΩ 2.0MΩ 2.2Ω 22Ω 220Ω 2.2kΩ 22kΩ 220kΩ 2.2MΩ 2.4Ω 24Ω 240Ω 2.4kΩ 24kΩ 240kΩ 2.4MΩ 2.7Ω 27Ω 270Ω 2.7kΩ 27kΩ 270kΩ 2.7MΩ 3.0Ω 30Ω 300Ω 3.0KΩ 30KΩ 300KΩ 3.0MΩ 3.3Ω 33Ω 330Ω 3.3kΩ 33kΩ 330kΩ 3.3MΩ 3.6Ω 36Ω 360Ω 3.6kΩ 36kΩ 360kΩ 3.6MΩ 3.9Ω 39Ω 390Ω 3.9kΩ 39kΩ 390kΩ 3.9MΩ 4.3Ω 43Ω 430Ω 4.3kΩ 43KΩ 430KΩ 4.3MΩ 4.7Ω 47Ω 470Ω 4.7kΩ 47kΩ 470kΩ 4.7MΩ 5.1Ω 51Ω 510Ω 5.1kΩ 51kΩ 510kΩ 5.1MΩ 5.6Ω 56Ω 560Ω 5.6kΩ 56kΩ 560kΩ 5.6MΩ 6.2Ω 62Ω 620Ω 6.2kΩ 62KΩ 620KΩ 6.2MΩ 6.8Ω 68Ω 680Ω 6.8kΩ 68kΩ 680kΩ 6.8MΩ 7.5Ω 75Ω 750Ω 7.5kΩ 75kΩ 750kΩ 7.5MΩ 8.2Ω 82Ω 820Ω 8.2kΩ 82kΩ 820kΩ 8.2MΩ 9.1Ω 91Ω 910Ω 9.1kΩ 91kΩ 910kΩ 9.1MΩ #generics #CommonPartsLibraryjharwinbarrozo1.5M
- A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF 10pF 100pF 1000pF 0.01uF 0.1uF 1.0uF 10uF 100uF 1000uF 10,000uF 1.1pF 11pF 110pF 1100pF 1.2pF 12pF 120pF 1200pF 1.3pF 13pF 130pF 1300pF 1.5pF 15pF 150pF 1500pF 0.015uF 0.15uF 1.5uF 15uF 150uF 1500uF 1.6pF 16pF 160pF 1600pF 1.8pF 18pF 180pF 1800pF 2.0pF 20pF 200pF 2000pF 2.2pF 22pF 20pF 2200pF 0.022uF 0.22uF 2.2uF 22uF 220uF 2200uF 2.4pF 24pF 240pF 2400pF 2.7pF 27pF 270pF 2700pF 3.0pF 30pF 300pF 3000pF 3.3pF 33pF 330pF 3300pF 0.033uF 0.33uF 3.3uF 33uF 330uF 3300uF 3.6pF 36pF 360pF 3600pF 3.9pF 39pF 390pF 3900pF 4.3pF 43pF 430pF 4300pF 4.7pF 47pF 470pF 4700pF 0.047uF 0.47uF 4.7uF 47uF 470uF 4700uF 5.1pF 51pF 510pF 5100pF 5.6pF 56pF 560pF 5600pF 6.2pF 62pF 620pF 6200pF 6.8pF 68pF 680pF 6800pF 0.068uF 0.68uF 6.8uF 68uF 680uF 6800uF 7.5pF 75pF 750pF 7500pF 8.2pF 82pF 820pF 8200pF 9.1pF 91pF 910pF 9100pF #generics #CommonPartsLibraryjharwinbarrozo1.5M
- A generic fixed inductor for rapid developing circuit topology. *You can now change the footprint and 3D model at the top level anytime you want. This is the power of #genericsjharwinbarrozo15.5k
- An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.Terminal
- 47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlinkjharwinbarrozo1.2M
- 10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcanjharwinbarrozo1.2M
- Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlinkjharwinbarrozo1.1M
This project is a reference design for an ESP32-WROOM-32E based device. It features USB-C for power and data transfer, onboard voltage regulation, and multiple peripheral connections. It also includes a CH340C for USB to serial conversion #referenceDesign #project #ESP32 #ESP32WROOM #RF #WIFI #MCU #simpleEmbedded #espressif #template
Pricing & Availability
Distributor | Qty 1 |
|---|---|
Arrow | $0.10–$0.53 |
Digi-Key | $1.05–$10.12 |
LCSC | $5.44–$6.11 |
Mouser | $1.30 |
Verical | $0.07–$0.26 |
Assets
ESP32-WROOM-32E Reference Design-removebg-preview.png
ESP32-WROOM-32E Reference Design-removebg-previewThumbnailControls
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