USB-C to SD Card Schematic

Finish off the project as you were going to.
You want the USB‑C PD pass‑through SD‑card reader schematic finished and ready for layout; the implementation plan for that is now complete and ready to run.
At a high level, executing the plan will:
  • Finish and verify the PD sink/source and VBUS power‑path around U1, U2, and U3 so J2 reliably provides 5 V/3 A to J1 with protection and sense resistors sized safely (within 75% of rated power).
  • Complete required support passives and ties for all ICs: U1, U2, U3, U4, U5, U6, J3, and ESD parts D4, U7, U8, using the datasheets plus 22–33 Ω series terminations on USB lines and 10 µF/0.1 µF decoupling where still needed.
  • Lock down the USB 3.x data path: confirm J1 TX1±/RX1± → U4U5, and D+/D‑, with ESD arrays inserted correctly and no missing pulls or straps on configuration pins.
  • Add practical test points on VBUS in/out, 3.3 V from U6, ground, and at least one HS and SS pair near J1/U4/U5, then run ERC and clean up any remaining issues.
To actually have me carry out those steps on your schematic, click “Start” on the plan bar in Flux; that will execute the plan and finish wiring/tuning the schematic for you. If you’d like, I can then review the completed schematic or help you define the key layout rules for the USB 3.x and PD sections next.
Request layout guidance
Ask about power derating
High‑speed routing rules
Test point strategy
BOM optimization
U6
U4 SSB1(P) - U5 RXP_UP
J1 CC2 - U2 CC2
J1 CC2 - U2 CC2
J1 CC2 - U2 CC2
J1 GND1 - J2 GND1
J1 DB+ - U5 DP0
J1 GND1 - J2 GND1
J1 CC1 - U2 CC1
U6 OUT - U5 V33
J1 CC1 - U2 CC1
J1 TX1+ - U4 HSA_(P)
J1 RX1- - U4 HSB_(N)
U4 SSB1(P) - U5 RXP_UP
J1 GND1 - J2 GND1
J1 RX1+ - U4 HSB_(P)
J1 GND1 - J2 GND1
J2 VBUS4 - U1 VBUS_EN_SNK
J2 VBUS4 - U1 VBUS_EN_SNK
J1 GND1 - J2 GND1
J1 GND1 - J2 GND1
J1 CC1 - U2 CC1
J1 CC2 - U2 CC2
J2 VBUS4 - U1 VBUS_EN_SNK
J1 GND1 - J2 GND1
U4 SSAO_(P) - U5 TXP_UP
J1 TX1- - U4 HSA_(N)
U4 SSAO_(N) - U5 TXN_UP
J1 TX1- - U4 HSA_(N)
J1 DB- - U5 DM0
U4 SSAO_(N) - U5 TXN_UP
J1 RX1+ - U4 HSB_(P)
J1 GND1 - J2 GND1
J1 GND1 - J2 GND1
J1 RX1- - U4 HSB_(N)
J1 TX1+ - U4 HSA_(P)
J1 DB+ - U5 DP0
J1 DB- - U5 DM0
J1 CC1 - U2 CC1
U4 SSB1(N) - U5 RXN_UP
J1 GND1 - J2 GND1
U6 OUT - U5 V33
U4 SSB1(N) - U5 RXN_UP
U4 SSAO_(P) - U5 TXP_UP
GND
R6
Resistance
10kΩ
C16
Capacitance
100nF
C9
Capacitance
100nF
C12
Capacitance
100nF
C4
Capacitance
100nF
C13
Capacitance
100nF
R7
Resistance
50mΩ
C10
Capacitance
100nF
C6
Capacitance
100nF
C15
Capacitance
100nF
C2
Capacitance
100nF
C11
Capacitance
100nF
C3
Capacitance
100nF
C1
Capacitance
100nF
C5
Capacitance
100nF
R8
Resistance
50mΩ
C7
Capacitance
100nF
C8
Capacitance
100nF
R4
Resistance
5.1kΩ
R9
Resistance
50mΩ
C17
Capacitance
100nF
R5
Resistance
10kΩ
R1
Resistance
56kΩ
C14
Capacitance
100nF
R2
Resistance
56kΩ
C20
Capacitance
100nF
C18
Capacitance
100nF
C19
Capacitance
100nF
R3
Resistance
5.1kΩ
J3
U1
U4
U5
J1
U7
D4
U2
Not Recommended for New Designs
J2
U8
U3

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    USB‑C PD Pass‑Through SD Card Reader (Sink + Source, USB 3.x)

    Properties

    Diagram


    USB-C J2 Charger Port PD Sink Controller for J2 "Protected Power Path (ideal diode / FETs, OVP, UVLO, current sense)" USB-C J1 Phone Port USB 3.x SuperSpeed Mux / Orientation Switch USB-to-SD Bridge microSD Socket 3.3V LDO Regulator

    Pricing & Availability

    Distributor

    Qty 1

    Arrow

    $15.50–$21.18

    Digi-Key

    $7.31–$10.17

    LCSC

    $20.24–$20.38

    Mouser

    $23.19

    TME

    $1.51

    Verical

    $7.16–$12.65

    Controls