MCU Power Connection Analysis

Running ERC and DRC...

0:31

Started: Run ERC and DRC to verify no new errors

138 days

Fetched and summarized ERC/DRC results

0:54

Started: Fetch ERC and DRC review results and message the user with a summary of any issues or confirm no new errors

Running design review.

138 days

Updated 5 document properties

0:08

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"

138 days

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

138 days

Updated labels for 3 net labels

0:03

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

138 days

Worked

138 days

flux

0:00

Work done • All implementation plan tasks were completed except reviewing passive component ratings (5.3).
Tasks remaining • 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.
Next step Proceed to PCB layout preparation: review and update footprints, configure board stackup, and choose a mounting solution for fabrication.
138 days
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    sound-mqtt thumbnail
    1S LiPo USB-C Power Management and 3.3V Regulation Subsystem with SIM800L Modem, TPS61088 5V Boost for MAX98357A Audio and W25Q32 SPI MP3 Storage

    Properties

    Diagram
    


  
    
  
  
    
  



""Existing Power Chain""


""Audio Playback Path""


""SPI NOR Storage""
























5V boost

BTL+

BTL-

MOSI

MISO

CLK

CS
























"U2 SIM800L"
"GND"
"J1 Battery"
"Q1 PFET AO4407A"
"SYS net"
"U3 TPS62130 Buck"
"3V3 net"
"U1 ESP-12F MCU"
"J3 USB-C"
"U4 SLM6400 Charger"
"U5 TPS61088 Boost"
"5V net"
"U5 EN"
"R10 node_100kΩ Pdwn"
"U1 GPIOx (EN control)"
"U6 MAX98357A Amp"
"J2 Speaker+"
"J2 Speaker-"
"C_spi node_100nF"
"U7 W25Q32 NOR"
"U1 MOSI"
"U1 MISO"
"U1 SCLK"
"U1 GPIOy (CS)"

    Pricing & Availability

    Distributor

    Qty 1

    LCSC

    $3.92–$3.99

    Controls