USB Multi-Rail LDO Design
0:00
Work done
- Built the multi-rail LDO schematic blocks and nets: J1 as 2-pin +5V input, U1 TLV70033, U2 TLV70018, and 1 uF input/output caps C1 - C6 wired to +5V_USB / rails / GND.
- Labeled rails as +5V_USB, +3V3, +1V8, +1V1, and GND.
Success criteria review
- ✅ Includes the 2-pin power connector, two TLV700xx regulators, and 1 uF input/output capacitors per regulator.
- ✅ All required nets are labeled (+5V_USB, +3V3, +1V8, +1V1, GND).
- ❌ Cannot place the required TLV70011 SOT-23-5 as U3: the library search for "TLV70011" returns only TLV7011 comparator variants, not the TLV70011 LDO.
Next steps
I can finish this as soon as we have a valid TLV70011 LDO part in the library (or you provide a specific part UID/MPN that exists there). Want me to:
- Use an approved alternative 1.1 V fixed SOT-23-5 LDO you choose, or
- Keep the schematic as-is and wait until TLV70011 becomes available?
27 days
1:26
Chat History
Project
Clarifying capabilities and actions.
Summarizing conversation guidelines.
Clarifying layout capabilities.
Checking if I can make the changes for you.
Using Knowledge Base Tool.
Calling @action for PCB layout.
Short answer: I can’t directly place components or route traces for you in Flux. Component placement, starting/stopping Auto-Layout, and manual routing are human-only actions.
What I can do for you:
- Prepare the PCB: add/replace parts, make net connections, sync schematic-to-PCB, and change the board size.
- Verify: check footprints, net names, and run reviews. DRC runs continuously and is shown in the Review tab.
- Guide: recommend layout rules, placement order, and routing strategy.
If you want, I can get the PCB ready (parts, nets, board size) so you can run Auto-Layout and finish routing.
Ask placement guidance
Set board outline
Find footprints
Review decoupling
Routing strategy check
27 days
Plan completed.
Show Plan
J1 1 - U1 IN
U2 OUT - C4 P1
U1 OUT - C2 P1
GND
U3 VCC - C6 P1
U3 VCC - C6 P1
U3
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
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- 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
Inspect
Divine Moccasin KITT
Controls
Properties
System Architecture
flowchart TD
J1["2-pin USB 5V input connector"] -->|+5V_USB| VINBUS["+5V_USB net"]
GND0["GND"] --> GNDNET["GND net"]
VINBUS --> U1["TLV70033 LDO"]
VINBUS --> U2["TLV70018 LDO"]
VINBUS --> U3["TLV70011 LDO"]
U1 --> V33["+3V3 rail"]
U2 --> V18["+1V8 rail"]
U3 --> V11["+1V1 rail"]
VINBUS --> C1["1uF input cap U1"]
VINBUS --> C3["1uF input cap U2"]
VINBUS --> C5["1uF input cap U3"]
V33 --> C2["1uF output cap U1"]
V18 --> C4["1uF output cap U2"]
V11 --> C6["1uF output cap U3"]
C1 --> GNDNET
C2 --> GNDNET
C3 --> GNDNET
C4 --> GNDNET
C5 --> GNDNET
C6 --> GNDNET
Availability & Pricing
| Distributor | Qty 1 | |
|---|---|---|
| Arrow | $1.14–$1.73 | |
| LCSC | $1.83 | |
| Mouser | $2.49 | |
| TME | $0.80 | |
| Verical | $0.34–$4.45 | |
Assets
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