Buck Converter Transient Simulation
17:31
Using relevant skills for analysis.
Reviewing the bill of materials.
Analyzing the schematic.
Looking for "switching frequency output voltage feedback reference recommended typical application circuit RT8059GJ5 buck converter" in lcsc_datasheet_1811100910_Richtek-Tech-RT8059GJ5_C20542.pdf
Analyzing the schematic.
Calculating.
Preparing a simulation.
Planning for simulation setup.
Adjusting simulation parameters.
Exploring initial conditions.
Designing a controller circuit.
Evaluating load transient control.
Exploring switching regulator options.
Considering transient response and plots.
Considering simulation setup.
Running Simulator.
Evaluating circuit components.
Running Simulator.
Troubleshooting circuit issues.
Analyzing voltage output.
Considering model accuracy.
Evaluating switching regulator behavior.
Simulating regulator behavior.
Considering output stability.
Considering smoothing output.
Running Simulator.
Analyzing circuit behavior.
Exploring load alternatives.
Calculating resistor values.
Exploring simulation approach.
Addressing op simulation issues.
Testing resistor loads.
Simulating with feedback.
Running Simulator.
Testing configurations.
Running Simulator.
Testing pulse sources.
Running Simulator.
Considering model construction.
Running Simulator.
Considering alternative approaches.
Evaluating modeling options.
Modeling capacitor behavior.
Setting up ODE parameters.
Simplifying circuit analysis.
Adjusting the simulation model.
Creating plots and data.
Providing simulation results.
Reproducing CSV Data.
Simulation complete.
Done — I reran the full 0 to 5 ms transient for U4.
Result summary
| Metric | Result |
|---|---|
| Startup to 90% of 3.3 V | 283.75 µs |
| Startup to 99% of 3.3 V | 494.50 µs |
| Peak startup voltage | 3.2956 V |
| Startup overshoot above 3.3 V | 0.0 mV |
| Pre-step average VOUT | 3.2961 V |
| Minimum VOUT after 2 ms load step | 2.8787 V |
| Peak undershoot below 3.3 V | 421.3 mV |
| Maximum rebound after step | 3.5786 V |
| Peak overshoot above 3.3 V after step | 278.6 mV |
| Post-step settled average VOUT | 3.2607 V |
| Settled within ±1% of final post-step value by | 2.4655 ms |
- Startup ramp: monotonic rise, reaching regulation in about 0.5 ms
- Load step at 2 ms: significant droop, then rebound above nominal before settling
- Transient behavior: this condition looks fairly aggressive for the requested 100 mA → 1 A step
You should see these in the Files section:
rt8059_full_0_5ms.pngrt8059_startup_zoom.pngrt8059_load_step_zoom.pngrt8059_equiv_buck_transient.csvrt8059_metrics.txt
I could not use a vendor SPICE macro-model for U4, so this run used a datasheet-equivalent closed-loop buck model. That means the startup and load-step waveforms are useful for engineering guidance, but the exact overshoot/undershoot numbers should be treated as approximate rather than silicon-accurate.
If you want, I can next:
- tune the equivalent model for a more realistic response, or
- extract ripple / inductor current details from the generated CSV.
Extract ripple metrics
Tune transient model
Check compensation parts
4 days
Ready.
C11
Capacitance
1uF
C17
Capacitance
10uF
SOLAR POWER INTERFACE
LORA_RX
C24
Capacitance
10uF
C18
Capacitance
100nF
MIC_SDA
Q1 Disconnects SOLAR input when both SOLAR and USB are connected. NOTE: This is a depletion type mosfet
LORA_TX
C19
Capacitance
68pF
C21
Capacitance
100nF
I_ch = (Vset / Rset) * 900 = 900mA
XOUT
XIN
MIC_WS
C23
Capacitance
100nF
R14
Resistance
6k8 Ω
R8
Resistance
15kΩ
VBAT
R13
Resistance
68kΩ
R11
Resistance
1k5 Ω
D4
Color
Red
+3V3
R7
Resistance
2kΩ
D5
Color
Green
U3
Q1
U5
L2
Inductance
2u2 H
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
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- 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, 10000uF 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, 220pF, 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 suitable for rapid circuit topology development. The footprint automatically adapts based on the selected package, supporting standard SMD sizes (e.g., 0402, 0603, 0805) as well as well-known inductor packages such as SDR1806, PA4320, SRN6028, and SRR1260. Standard inductor values: 1.0 nH, 10 nH, 100 nH, 1.0 µH, 10 µH, 100 µH, 1.0 mH 1.2 nH, 12 nH, 120 nH, 1.2 µH, 12 µH, 120 µH, 1.2 mH 1.5 nH, 15 nH, 150 nH, 1.5 µH, 15 µH, 150 µH, 1.5 mH 1.8 nH, 18 nH, 180 nH, 1.8 µH, 18 µH, 180 µH, 1.8 mH 2.2 nH, 22 nH, 220 nH, 2.2 µH, 22 µH, 220 µH, 2.2 mH 2.7 nH, 27 nH, 270 nH, 2.7 µH, 27 µH, 270 µH, 2.7 mH 3.3 nH, 33 nH, 330 nH, 3.3 µH, 33 µH, 330 µH, 3.3 mH 3.9 nH, 39 nH, 390 nH, 3.9 µH, 39 µH, 390 µH, 3.9 mH 4.7 nH, 47 nH, 470 nH, 4.7 µH, 47 µH, 470 µH, 4.7 mH 5.6 nH, 56 nH, 560 nH, 5.6 µH, 56 µH, 560 µH, 5.6 mH 6.8 nH, 68 nH, 680 nH, 6.8 µH, 68 µH, 680 µH, 6.8 mH 8.2 nH, 82 nH, 820 nH, 8.2 µH, 82 µH, 820 µH, 8.2 mH #generics #CommonPartsLibraryjharwinbarrozo15.7k
- 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
AvocAudio: A tinyML community board v1
AvocAudio is a compact tinyML community board designed for extensive audio data collection for various tinyML applications. It leverages the Raspberry Pi RP2040 and integrates a LoRa-E5 LoRaWAN Transceiver Module for connectivity. Equipped with an SD card slot for local data storage, the board ensures efficient data collection. The board operates on solar power or a lithium-ion battery, ensuring flexible and efficient energy use. #audioDevices #raspberryPi #rp2040 #lorawan #iot #solar
Properties
Scientific
RoHS
3.3
LoRaWAN
Buttons
Microphone, Temperature sensor, Humidity sensor
SD Card
Audio
Pricing & Availability
Distributor | Qty 1 |
|---|
Controls
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