MCU Power Connection Analysis
Thought for 8 sec
flux
- Set Project Description to "1S LiPo USB-C power management and 3.3 V buck regulator subsystem with SIM800L cellular modem supply, 5 V boost for audio pla..."
- Set Power Requirements to "USB"
- Set Power Requirements (Secondary) to "Battery"
- Set Connectivity to "Cellular"
- Set Domain to "Telecommunications"
Renaming nets to "5V", "AUDIO", "SPI_CS"...
0:26
Started: Review net names for new nets and rename nets to "5V", "AUDIO", "SPI_CS" as needed.
Thought for 3 sec
flux
- Renamed 32a3b9ee-89b2-42a6-a6c5-e371af0bcd98 to 5V
- Renamed dd8d717e-5e83-4fb9-a2d3-7abd3a80bcb4 to AUDIO
- Renamed 221880d3-b096-45c9-9c45-b9003dbf2189 to SPI_CS
Worked
Thought
flux
Work done
• All implementation plan tasks were completed except reviewing passive component ratings (5.3).
• All implementation plan tasks were completed except reviewing passive component ratings (5.3).
Tasks remaining
• Review all passives for appropriate voltage and power ratings.
• Review all passives for appropriate voltage and power ratings.
Success criteria
✔️ TPS61088 boost converter produces a regulated 5 V rail from SYS under GPIO control (U5 powered and FB network in place).
✔️ MAX98357A amplifier is powered from 5 V and drives J2 with BTL outputs.
✔️ W25Q32 SPI NOR is connected to U1 (CLK, MOSI, MISO, CS) with decoupling.
✔️ Existing BAT→charger→SYS→3V3 chain is unaffected.
✔️ TPS61088 boost converter produces a regulated 5 V rail from SYS under GPIO control (U5 powered and FB network in place).
✔️ MAX98357A amplifier is powered from 5 V and drives J2 with BTL outputs.
✔️ W25Q32 SPI NOR is connected to U1 (CLK, MOSI, MISO, CS) with decoupling.
✔️ Existing BAT→charger→SYS→3V3 chain is unaffected.
Next step
Proceed to PCB layout preparation: review and update footprints, configure board stackup, and choose a mounting solution for fabrication.
Proceed to PCB layout preparation: review and update footprints, configure board stackup, and choose a mounting solution for fabrication.
