USB-C PD 5V supply — development
USB-C PD 5V supply — development is an open source PCB design by rjwalters: a 4-layer, 100 × 65 mm board with 47 components (32 distinct parts). It is built around the STUSB4500QTR, TPS54302DDCR, INA226AIDGSR, TLV76033DBZR. Filed under power & battery.
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Active development: a standalone USB-C PD sink powers a fixed 5 V buck regulator, targeting 3 A output, with I2C current/voltage telemetry. This is a real assembled-demo design, not a synthetic routing fixture. No manufacturing or measured-performance release has been made.
USB-C input → negotiated and switched VBUS → synchronous buck → shunt → 5 V output. A separate low-current 3.3 V supply powers the telemetry interface. An external 3.3 V I2C host reads telemetry and inspects the PD configuration; ordinary standalone power conversion does not require application firmware.
Built around
Parts list
47 components, 32 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | STUSB4500QTR | QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm | U1 |
| 1 | TPS54302DDCR | TSOT-23-6 | U2 |
| 1 | INA226AIDGSR | MSOP-10_3x3mm_P0.5mm | U3 |
| 1 | TLV76033DBZR | SOT-23 | U4 |
| 2 | AO4407A | SOIC-8_3.9x4.9mm_P1.27mm | Q1, Q2 |
| 1 | TYPE-C-31-M-12 USB-C PD INPUT | USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
| 1 | MKDS 1,5/2-5,08 5V OUTPUT | TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | J2 |
| 1 | TSW-106-07-G-S I2C HOST 3V3 | PinHeader_1x06_P2.54mm_Vertical | J3 |
| 1 | 0467002.NR 2A 32V | Fuse_1206_3216Metric | F1 |
| 1 | WSK2512R0100FEA 10m 1% 1W | R_Shunt_Vishay_WSK2512_6332Metric_T1.19mm | RSH1 |
| 1 | BZT52C12 12V | D_SOD-123 | D1 |
| 1 | LTST-C190KGKT OUTPUT | LED_0603_1608Metric | D2 |
| 1 | SRP7050TA-100M 10uH | SRP7050TA | L1 |
| 2 | 100NF 1u 50V | C_0603_1608Metric | C1, C13 |
| 4 | 100NF 1u 16V | C_0603_1608Metric | C2, C3, C14, C15 |
| 1 | 100NF 4.7n 50V | C_0603_1608Metric | C4 |
| 1 | CL31B106KBHNNNE 10u 50V | C_1206_3216Metric | C5 |
| 4 | CC0603KRX7R9BB104 100n 50V | C_0603_1608Metric | C6, C7, C11, C12 |
| 2 | CL31A226KAHNNNE 22u 25V | C_1206_3216Metric | C8, C9 |
| 1 | 100NF 75p C0G | C_0603_1608Metric | C10 |
Show 12 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | C21189 100k | R_0603_1608Metric | R1 |
| 1 | 10K 10k | R_0603_1608Metric | R2 |
| 2 | CRCW12061K00FKEAHP 1k | R_1206_3216Metric | R3, R4 |
| 1 | 680k | R_0603_1608Metric | R5 |
| 1 | 100k | R_0603_1608Metric | R6 |
| 1 | RT0603BRD07100KL 100k 0.1% | R_0603_1608Metric | R7 |
| 1 | RT0603BRD0713K3L 13.3k 0.1% | R_0603_1608Metric | R8 |
| 1 | 49.9 | R_0603_1608Metric | R9 |
| 2 | 10 | R_0603_1608Metric | R10, R11 |
| 2 | 4.7k | R_0603_1608Metric | R12, R13 |
| 4 | 10k | R_0603_1608Metric | R14, R15, R17, R18 |
| 1 | 2.2k | R_0603_1608Metric | R16 |
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