# Voltage-domain ERC — esp32-bosch-bmp-air

0 error(s), 0 warning(s). Ambient 50 °C. Specs: `specs/parts/`.

## Findings

| sev | code | where | detail |
|---|---|---|---|
| INFO | INPUT_MAX | U1.18 | IO10 on VBAT_SENSE exceeds operating max VDD+0.3 by 732 mV (BAT up to 4.250 V vs VDD min 3.218 V+0.30 V)  [waived: VBAT_SENSE is the midpoint of a 100k/100k divider from BAT (max 4.25 V): the pin sees at most 2.13 V] |
| INFO | ABS_MAX | U1.18 | IO10 on VBAT_SENSE reaches 4.25 V > abs max 3.6 V (3.6)  [waived: VBAT_SENSE is the midpoint of a 100k/100k divider from BAT (max 4.25 V): the pin sees at most 2.13 V] |
| INFO | SUPPLY_RANGE | U2.4 | VIN on VSYS = 0..5.2 V, below min 2.5 V  [waived: VSYS = USB (through D1) or battery (through Q1, body diode / on); the ERC cannot see the power mux. It is 3.0..4.25 V on battery (the buck stops at its 2.3-2.45 V undervoltage lockout) and 4.4..5.2 V on USB, never 0 V with a source present] |
| INFO | REG_VIN | U2 | Vin 0..5.2 below vin_min 2.5  [waived: same: the ERC takes VSYS min as 0 V (power mux not modelled)] |
| INFO | THERMAL | U5 | Tj 201 °C > 145 °C (P 3025 mW, θJA 50 °C/W, Ta 50 °C)  [waived: the ERC multiplies VCC (5.5 V) by the whole 500 mA; the real dissipation is (VUSB - VBAT) x 0.5 A = 0.65 W at 3.7 V (1.25 W at 3.0 V), Tj ~ 80-110 C with the exposed pad on copper, and the TP4056 reduces the current itself at 145 C (TLIM)] |

## Rails (power budget)

| rail | source | V | load mA | rated mA | use | nets |
|---|---|---|---|---|---|---|
| +3V3 | U2 (R13=453000 / R14=100000) | 3.22..3.42 | 271.4 | 2000 | 14 % | +3V3, SW |
| BAT | external | 3..4.25 | 0.0 | - |  | BAT |
| VBUS | external | 4.75..5.5 | 550.0 | - |  | VBUS, +5V |

### Loads

| rail | net | ref.pin | mA |
|---|---|---|---|
| +3V3 | +3V3 | U1.2 | 100.00 |
| +3V3 | +3V3 | U3.1 | 0.10 |
| +3V3 | +3V3 | U3.10 | 1.00 |
| +3V3 | +3V3 | U7.8 | 30.00 |
| +3V3 | +3V3 | U7.6 | 0.05 |
| +3V3 | +3V3 | U10.6 | 5.10 |
| +3V3 | +3V3 | U4.5 | 0.10 |
| +3V3 | +3V3 | U4.8 | 5.00 |
| +3V3 | +3V3 | J4.1 | 130.00 |
| VBUS | +5V | U5.4 | 550.00 |

### Beads / series inductors

| ref | from | to | mA | DCR Ω | drop mV | rated mA |
|---|---|---|---|---|---|---|
| F1 | VBUS | +5V | 550.0 | 0.5 | 275.0 | 750 |
| L1 | +3V3 | SW | 0.0 | 0.07 | 0.0 | 2500 |

## Thermal budget

| ref | part | P mW | basis | θJA °C/W | Tj °C | limit °C | |
|---|---|---|---|---|---|---|---|
| Q1 | AO3401A | 0 | Σ V·I_max of supply pins | 100 | 50 | 150 | ok |
| Q3 | AO3401A | 0 | Σ V·I_max of supply pins | 100 | 50 | 150 | ok |
| U1 | ESP32-S3-WROOM-1-N4 | 342 | Σ V·I_max of supply pins | 40 | 64 | 105 | ok |
| U2 | TLV62569DBVR | 103 | 927 mW out @ η 0.9 | 150 | 65 | 125 | ok |
| U3 | BMP581 | 4 | Σ V·I_max of supply pins | 200 | 51 | 85 | ok |
| U4 | ASM330LHHTR | 17 | Σ V·I_max of supply pins | 100 | 52 | 105 | ok |
| U5 | TP4056-42-ESOP8 | 3025 | Σ V·I_max of supply pins | 50 | 201 | 145 | ERROR |
| U6 | USBLC6-2SC6 | 0 | Σ V·I_max of supply pins | 300 | 50 | 125 | ok |
| U7 | ATGM336H-5N31 | 103 | Σ V·I_max of supply pins | 60 | 56 | 85 | ok |
| U8 | DW01A | 0 | Σ V·I_max of supply pins | 200 | 50 | 125 | ok |
| U9 | FS8205A | 0 | Σ V·I_max of supply pins | 100 | 50 | 150 | ok |
| U10 | AT2659S | 17 | Σ V·I_max of supply pins | 200 | 53 | 105 | ok |

## Power out through connectors

Regulator outputs that leave the board (declared in erc.yaml `connector_loads`; the regulator's total capacity is the lower of its rating and its thermal limit at the worst-case input and ambient).

| pin | rail | source | declared mA | rated mA | thermal mA | board's own mA | left mA | |
|---|---|---|---|---|---|---|---|---|
| J4.1 (VCC) | +3V3 | U2 | 130 | 2000 | 1317 | 141 | 1175 | screen module (LCDWIKI MSP3526): 95 mA backlight + controller / touch, fed from 3V3 through its own regulator |

## Per-pin table

| ref | pin | name | type | net | V | limit | status |
|---|---|---|---|---|---|---|---|
| BZ1 | 1 | A | passive | BUZ_A | 0..3.42 |  | ok |
| BZ1 | 2 | B | passive | BUZ_B | 0..3.42 |  | ok |
| D1 | 1 | K | passive | VSYS | 0..5.2 |  | ok |
| D1 | 2 | A | passive | +5V | 4.47..5.5 |  | ok |
| D2 | 1 | K | passive | CHRG | 0..3.42 |  | ok |
| D2 | 2 | A | passive | LED_CHRG | 3.22..3.42 |  | ok |
| D3 | 1 | K | passive | STDBY | 0..3.42 |  | ok |
| D3 | 2 | A | passive | LED_DONE | 3.22..3.42 |  | ok |
| D4 | 1 | K | passive | GND | 0 |  | ok |
| D4 | 2 | A | passive | LED_USER_A | 0..3.42 |  | ok |
| D5 | 1 | K | passive | BTN_F | 0..5.2 |  | ok |
| D5 | 2 | A | passive | BOOT | 0..3.42 |  | ok |
| D6 | 1 | K | passive | BUCK_EN | 0..5.2 |  | ok |
| D6 | 2 | A | passive | PWR_HOLD | 0..3.42 |  | ok |
| D7 | 1 | K | passive | BUCK_EN | 0..5.2 |  | ok |
| D7 | 2 | A | passive | VBUS_EN | 4.47..5.5 |  | ok |
| E1 | 1 | FEED | passive | ANT_A | ? |  | ok |
| E1 | 2 | FAR | passive | - | ? |  | nc |
| F1 | 1 | 1 | passive | VBUS | 4.75..5.5 |  | ok |
| F1 | 2 | 2 | passive | +5V | 4.47..5.5 |  | ok |
| J1 | A1 | GND | passive | GND | 0 |  | ok |
| J1 | A4 | VBUS | passive | VBUS | 4.75..5.5 |  | ok |
| J1 | A5 | CC1 | passive | CC1 | 0 |  | ok |
| J1 | A6 | DP1 | passive | USB_DP | 0..3.42 |  | ok |
| J1 | A7 | DN1 | passive | USB_DN | 0..3.42 |  | ok |
| J1 | A8 | SBU1 | passive | - | ? |  | nc |
| J1 | A9 | VBUS | passive | VBUS | 4.75..5.5 |  | ok |
| J1 | A12 | GND | passive | GND | 0 |  | ok |
| J1 | B1 | GND | passive | GND | 0 |  | ok |
| J1 | B4 | VBUS | passive | VBUS | 4.75..5.5 |  | ok |
| J1 | B5 | CC2 | passive | CC2 | 0 |  | ok |
| J1 | B6 | DP2 | passive | USB_DP | 0..3.42 |  | ok |
| J1 | B7 | DN2 | passive | USB_DN | 0..3.42 |  | ok |
| J1 | B8 | SBU2 | passive | - | ? |  | nc |
| J1 | B9 | VBUS | passive | VBUS | 4.75..5.5 |  | ok |
| J1 | B12 | GND | passive | GND | 0 |  | ok |
| J1 | SH | SHIELD | passive | GND | 0 |  | ok |
| J2 | 1 | BAT+ | supply_in | BAT | 3..4.25 | min 3 max 4.25 | ok |
| J2 | 2 | GND | passive | BM | ? |  | ok |
| J4 | 1 | VCC | passive | +3V3 | 3.22..3.42 |  | ok |
| J4 | 2 | GND | passive | GND | 0 |  | ok |
| J4 | 3 | LCD_CS | passive | LCD_CS | 0..3.42 |  | ok |
| J4 | 4 | LCD_RST | passive | LCD_RST | 0..3.42 |  | ok |
| J4 | 5 | LCD_RS | passive | LCD_DC | 0..3.42 |  | ok |
| J4 | 6 | SDI | passive | LCD_MOSI | 0..3.42 |  | ok |
| J4 | 7 | SCK | passive | LCD_SCK | 0..3.42 |  | ok |
| J4 | 8 | LED | passive | LCD_BL | 0..3.42 |  | ok |
| J4 | 9 | SDO | passive | - | ? |  | nc |
| J4 | 10 | CTP_SCL | passive | SCL | 0..3.42 |  | ok |
| J4 | 11 | CTP_RST | passive | CTP_RST | 0..3.42 |  | ok |
| J4 | 12 | CTP_SDA | passive | SDA | 0..3.42 |  | ok |
| J4 | 13 | CTP_INT | passive | CTP_INT | 0..3.42 |  | ok |
| J4 | 14 | SD_CS | passive | - | ? |  | nc |
| L1 | 1 | 1 | passive | SW | 3.22..3.42 |  | ok |
| L1 | 2 | 2 | passive | +3V3 | 3.22..3.42 |  | ok |
| L2 | 1 | 1 | passive | ANT_A | ? |  | ok |
| L2 | 2 | 2 | passive | ANT_B | ? |  | ok |
| L3 | 1 | 1 | passive | ANT_A | ? |  | ok |
| L3 | 2 | 2 | passive | GND | 0 |  | ok |
| L4 | 1 | 1 | passive | LNA_IN | ? |  | ok |
| L4 | 2 | 2 | passive | GND | 0 |  | ok |
| Q1 | 1 | G | bus | +5V | 4.47..5.5 |  | ok |
| Q1 | 2 | S | bus | VSYS | 0..5.2 |  | ok |
| Q1 | 3 | D | bus | BAT | 3..4.25 |  | ok |
| Q3 | 1 | G | bus | PWR_BTN | 0..5.2 |  | ok |
| Q3 | 2 | S | bus | VSYS | 0..5.2 |  | ok |
| Q3 | 3 | D | bus | BUCK_EN | 0..5.2 |  | ok |
| SW1 | 1 | A | passive | PWR_BTN | 0..5.2 |  | ok |
| SW1 | 2 | A | passive | PWR_BTN | 0..5.2 |  | ok |
| SW1 | 3 | B | passive | GND | 0 |  | ok |
| SW1 | 4 | B | passive | GND | 0 |  | ok |
| SW2 | 1 | A | passive | EN | 3.22..3.42 |  | ok |
| SW2 | 2 | A | passive | EN | 3.22..3.42 |  | ok |
| SW2 | 3 | B | passive | GND | 0 |  | ok |
| SW2 | 4 | B | passive | GND | 0 |  | ok |
| U1 | 1 | GND | ground | GND | 0 |  | ok |
| U1 | 2 | VDD | supply | +3V3 | 3.22..3.42 | min 3 max 3.6 abs 3.6 | ok |
| U1 | 3 | EN | input | EN | 3.22..3.42 | max 3.52 abs 3.6 | ok |
| U1 | 4 | IO4 | io | CHRG | 0..3.42 | max 3.52 abs 3.6 | ok |
| U1 | 5 | IO5 | io | STDBY | 0..3.42 | max 3.52 abs 3.6 | ok |
| U1 | 6 | IO6 | io | BUZ_A | 0..3.42 | max 3.52 abs 3.6 | ok |
| U1 | 7 | IO7 | io | BUZ_B | 0..3.42 | max 3.52 abs 3.6 | ok |
| U1 | 8 | IO15 | io | GPS_PPS | 0..3.42 | max 3.52 abs 3.6 | ok |
| U1 | 9 | IO16 | io | GPS_TX | 0..3.42 | max 3.52 abs 3.6 | ok |
| U1 | 10 | IO17 | io | GPS_RX | 0..3.42 | max 3.52 abs 3.6 | ok |
| U1 | 11 | IO18 | io | - | ? |  | nc |
| U1 | 12 | IO8 | io | SDA | 0..3.42 | max 3.52 abs 3.6 | ok |
| U1 | 13 | IO19 | io | USB_DN | 0..3.42 | max 3.52 abs 3.6 | ok |
| U1 | 14 | IO20 | io | USB_DP | 0..3.42 | max 3.52 abs 3.6 | ok |
| U1 | 15 | IO3 | io | - | ? |  | nc |
| U1 | 16 | IO46 | io | - | ? |  | nc |
| U1 | 17 | IO9 | io | SCL | 0..3.42 | max 3.52 abs 3.6 | ok |
| U1 | 18 | IO10 | io | VBAT_SENSE | 0..4.25 | max 3.52 abs 3.6 | ERROR |
| U1 | 19 | IO11 | io | IMU_INT1 | 0..3.42 | max 3.52 abs 3.6 | ok |
| U1 | 20 | IO12 | io | IMU_INT2 | 0..3.42 | max 3.52 abs 3.6 | ok |
| U1 | 21 | IO13 | io | BMP_INT | 0..3.42 | max 3.52 abs 3.6 | ok |
| U1 | 22 | IO14 | io | PWR_HOLD | 0..3.42 | max 3.52 abs 3.6 | ok |
| U1 | 23 | IO21 | io | - | ? |  | nc |
| U1 | 24 | IO47 | io | - | ? |  | nc |
| U1 | 25 | IO48 | io | - | ? |  | nc |
| U1 | 26 | IO45 | io | - | ? |  | nc |
| U1 | 27 | IO0 | io | BOOT | 0..3.42 | max 3.52 abs 3.6 | ok |
| U1 | 28 | IO35 | io | LCD_MOSI_E | 0..3.42 | max 3.52 abs 3.6 | ok |
| U1 | 29 | IO36 | io | LCD_SCK_E | 0..3.42 | max 3.52 abs 3.6 | ok |
| U1 | 30 | IO37 | io | LCD_CS | 0..3.42 | max 3.52 abs 3.6 | ok |
| U1 | 31 | IO38 | io | LED_USER | 0..3.42 | max 3.52 abs 3.6 | ok |
| U1 | 32 | IO39 | io | LCD_DC | 0..3.42 | max 3.52 abs 3.6 | ok |
| U1 | 33 | IO40 | io | LCD_RST | 0..3.42 | max 3.52 abs 3.6 | ok |
| U1 | 34 | IO41 | io | LCD_BL | 0..3.42 | max 3.52 abs 3.6 | ok |
| U1 | 35 | IO42 | io | CTP_RST | 0..3.42 | max 3.52 abs 3.6 | ok |
| U1 | 36 | RXD0 | io | - | ? |  | nc |
| U1 | 37 | TXD0 | io | - | ? |  | nc |
| U1 | 38 | IO2 | io | CTP_INT | 0..3.42 | max 3.52 abs 3.6 | ok |
| U1 | 39 | IO1 | io | - | ? |  | nc |
| U1 | 40 | GND | ground | GND | 0 |  | ok |
| U1 | 41 | GND | ground | GND | 0 |  | ok |
| U2 | 1 | EN | input | BUCK_EN | 0..5.2 | min 0 max 5.5 abs 6 | ok |
| U2 | 2 | GND | ground | GND | 0 |  | ok |
| U2 | 3 | SW | passive | SW | 3.22..3.42 |  | ok |
| U2 | 4 | VIN | supply | VSYS | 0..5.2 | min 2.5 max 5.5 abs 6 | ERROR |
| U2 | 5 | FB | analog | FB | 0..3.42 | abs 5.5 | ok |
| U3 | 1 | VDDIO | supply | +3V3 | 3.22..3.42 | min 1.08 max 3.6 abs 4.3 | ok |
| U3 | 2 | SCK | input | SCL | 0..3.42 | max 3.52 abs 4.3 | ok |
| U3 | 3 | VSS | ground | GND | 0 |  | ok |
| U3 | 4 | SDI | io | SDA | 0..3.42 | max 3.52 abs 4.3 | ok |
| U3 | 5 | SDO | input | GND | 0 | max 3.52 abs 4.3 | ok |
| U3 | 6 | CSB | input | +3V3 | 3.22..3.42 | max 3.72 abs 4.3 | ok |
| U3 | 7 | INT | output | BMP_INT | 0..3.42 |  | ok |
| U3 | 8 | VSS | ground | GND | 0 |  | ok |
| U3 | 9 | VSS | ground | GND | 0 |  | ok |
| U3 | 10 | VDD | supply | +3V3 | 3.22..3.42 | min 1.71 max 3.6 abs 4.3 | ok |
| U4 | 1 | SDO/SA0 | input | GND | 0 | max 3.52 abs 4 | ok |
| U4 | 2 | RES | passive | GND | 0 |  | ok |
| U4 | 3 | RES | passive | GND | 0 |  | ok |
| U4 | 4 | INT1 | output | IMU_INT1 | 0..3.42 |  | ok |
| U4 | 5 | Vdd_IO | supply | +3V3 | 3.22..3.42 | min 1.62 max 3.6 abs 4 | ok |
| U4 | 6 | GNSD | ground | GND | 0 |  | ok |
| U4 | 7 | GND | ground | GND | 0 |  | ok |
| U4 | 8 | Vdd | supply | +3V3 | 3.22..3.42 | min 2 max 3.6 abs 4 | ok |
| U4 | 9 | INT2 | output | IMU_INT2 | 0..3.42 |  | ok |
| U4 | 10 | NC | nc | - | ? |  | nc |
| U4 | 11 | NC | nc | - | ? |  | nc |
| U4 | 12 | CS | input | +3V3 | 3.22..3.42 | max 3.72 abs 4 | ok |
| U4 | 13 | SCL | input | SCL | 0..3.42 | max 3.52 abs 4 | ok |
| U4 | 14 | SDA | io | SDA | 0..3.42 | max 3.52 abs 4 | ok |
| U5 | 1 | TEMP | analog | GND | 0 |  | ok |
| U5 | 2 | PROG | analog | PROG | 0 |  | ok |
| U5 | 3 | GND | ground | GND | 0 |  | ok |
| U5 | 4 | VCC | supply | +5V | 4.47..5.5 | min 4 max 8 abs 8 | ok |
| U5 | 5 | BAT | bus | BAT | 3..4.25 |  | ok |
| U5 | 6 | STDBY | bus | STDBY | 0..3.42 |  | ok |
| U5 | 7 | CHRG | bus | CHRG | 0..3.42 |  | ok |
| U5 | 8 | CE | input | +5V | 4.47..5.5 | min 0 max 8 abs 10 | ok |
| U5 | 9 | EP | ground | GND | 0 |  | ok |
| U6 | 1 | I/O1 | bus | USB_DP | 0..3.42 |  | ok |
| U6 | 2 | GND | ground | GND | 0 |  | ok |
| U6 | 3 | I/O2 | bus | USB_DN | 0..3.42 |  | ok |
| U6 | 4 | I/O2 | bus | USB_DN | 0..3.42 |  | ok |
| U6 | 5 | VBUS | supply | VBUS | 4.75..5.5 | min 0 max 5.5 abs 6 | ok |
| U6 | 6 | I/O1 | bus | USB_DP | 0..3.42 |  | ok |
| U7 | 1 | GND | ground | GND | 0 |  | ok |
| U7 | 2 | TXD | output | GPS_TX | 0..3.42 |  | ok |
| U7 | 3 | RXD | input | GPS_RX | 0..3.42 | max 3.42 abs 3.6 | ok |
| U7 | 4 | 1PPS | output | GPS_PPS | 0..3.42 |  | ok |
| U7 | 5 | ON/OFF | input | +3V3 | 3.22..3.42 | max 3.62 abs 3.6 | ok |
| U7 | 6 | VBAT | supply | +3V3 | 3.22..3.42 | min 1.5 max 3.6 abs 3.6 | ok |
| U7 | 7 | NC | nc | - | ? |  | nc |
| U7 | 8 | VCC | supply | +3V3 | 3.22..3.42 | min 2.7 max 3.6 abs 3.6 | ok |
| U7 | 9 | nRESET | nc | - | ? |  | nc |
| U7 | 10 | GND | ground | GND | 0 |  | ok |
| U7 | 11 | RF_IN | bus | LNA_OUT | ? |  | ok |
| U7 | 12 | GND | ground | GND | 0 |  | ok |
| U7 | 13 | NC | nc | - | ? |  | nc |
| U7 | 14 | VCC_RF | nc | - | ? |  | nc |
| U7 | 15 | RES | nc | - | ? |  | nc |
| U7 | 16 | SDA | nc | - | ? |  | nc |
| U7 | 17 | SCL | nc | - | ? |  | nc |
| U7 | 18 | RES | nc | - | ? |  | nc |
| U8 | 1 | OD | bus | DW_OD | ? |  | ok |
| U8 | 2 | VM | bus | DW_VM | 0 |  | ok |
| U8 | 3 | OC | bus | DW_OC | ? |  | ok |
| U8 | 4 | TD | nc | - | ? |  | nc |
| U8 | 5 | VCC | passive | DW_VCC | 3..4.25 |  | ok |
| U8 | 6 | GND | passive | BM | ? |  | ok |
| U9 | 1 | S1 | passive | BM | ? |  | ok |
| U9 | 2 | D | passive | DW_D | ? |  | ok |
| U9 | 3 | S2 | passive | GND | 0 |  | ok |
| U9 | 4 | G2 | bus | DW_OC | ? |  | ok |
| U9 | 5 | D | passive | DW_D | ? |  | ok |
| U9 | 6 | G1 | bus | DW_OD | ? |  | ok |
| U10 | 1 | RFIN | bus | LNA_IN | ? |  | ok |
| U10 | 2 | GND | ground | GND | 0 |  | ok |
| U10 | 3 | GND | ground | GND | 0 |  | ok |
| U10 | 4 | RFOUT | bus | LNA_OUT | ? |  | ok |
| U10 | 5 | SHDN | input | +3V3 | 3.22..3.42 | min 0 max 3.6 abs 3.6 | ok |
| U10 | 6 | VDD | supply | +3V3 | 3.22..3.42 | min 1.5 max 3.6 abs 3.6 | ok |

## Spec sources

- `specs/parts/PKLCS1212E4001.yaml` (PKLCS1212E4001-R1): Murata specification of piezoelectric sounder JGB40-1584B (LCSC C113159): 4 max ratings (12.5 V o-p), 9 dimensions and recommended land pattern (pads 1.2 x 4.0 mm, 12.4 mm outer)
- `specs/parts/B5819W.yaml` (B5819W): Schottky 40 V 1 A SOD-123 (LCSC C8598), Vf ~0.45 V at 1 A (generic datasheet, unverified)
- `specs/parts/KT-0603R.yaml` (KT-0603R): Hubei KENTO KT-0603R spec for approval rev A.0 (2018-12-06): 4. Absolute Maximum Ratings, 5. Electrical Optical Characteristics, 6.2 Vf bins
- `specs/parts/KT-0603G.yaml` (KT-0603G): Hubei KENTO KT-0603G spec for approval rev A.0 (LCSC C12624): Absolute Maximum Ratings, Electrical Optical Characteristics
- `specs/parts/ACAG0301.yaml` (ACAG0301-1575-T): Abracon ACAG0301-1575-T datasheet rev 06.21.2018 (LCSC C5553150): 3.2 x 1.6 x 0.6 mm LTCC chip antenna, 1575 MHz, 4.18 dBi peak, layout with 6.0 x 5.0 mm clearance and pi match (2.4 nH series, 5.6 nH shunt on the 90 x 50 mm evaluation board)
- `specs/parts/nSMD075.yaml` (nSMD075): PTC resettable fuse nSMD series (LCSC C70078): electrical characteristics table (nSMD075 row), Ihold vs temperature table
- `specs/parts/TYPE-C-31-M-12.yaml` (TYPE-C-31-M-12): Korean Hroparts TYPE-C-31-M-12 drawing (LCSC C165948); pin names follow the USB Type-C receptacle pinout
- `specs/parts/JST-PH-2.yaml` (B2B-PH-K-S): JST PH series B2B-PH-K-S (LCSC C131337): 2 mm pitch, 2 A per contact; pin 1 = BAT+, pin 2 = GND by this board's choice (check the cell's plug)
- `specs/parts/PINSOCKET14.yaml` (PZ254R-11-14P): 1 x 14 female pin socket 2.54 mm (LCSC C41413623) for the LCDWIKI MSP3526 module's 14-pin header; pin order from the module's user manual (1 VCC, 2 GND, 3 LCD_CS, 4 LCD_RST, 5 LCD_RS, 6 SDI, 7 SCK, 8 LED, 9 SDO, 10 CTP_SCL, 11 CTP_RST, 12 CTP_SDA, 13 CTP_INT, 14 SD_CS)
- `specs/parts/SWPA4020.yaml` (SWPA4020S2R2NT): Sunlord SWPA4020S series power inductor 2.2 uH, 4 x 4 x 2 mm (LCSC C305171); TLV62569 datasheet 8.2.2.4 wants Isat above the 2 A switch limit
- `specs/parts/RFL0402.yaml` (LQG15HS): Murata LQG15HS 0402 RF chip inductors (LCSC C97997 2.4 nH, C85670 5.6 nH, C77110 6.8 nH)
- `specs/parts/AO3401A.yaml` (AO3401A): Alpha & Omega AO3401A P-channel MOSFET, -30 V, -4 A, Vgs(th) -0.7..-1.4 V, Vgs max +-12 V (LCSC C15127)
- `specs/parts/SW-TS1187A.yaml` (TS-1187A-B-A-B): XKB TS-1187A-B-A-B (LCSC C318884) tactile switch 5.1x5.1 mm; no electrical limits used
- `specs/parts/ESP32-S3-WROOM-1-N4.yaml` (ESP32-S3-WROOM-1-N4): Espressif ESP32-S3-WROOM-1 & WROOM-1U datasheet v1.3 (LCSC C2913197): Table 3-1 Pin Definitions, 5.1 Absolute Maximum Ratings, 5.2 Recommended Operating Conditions
- `specs/parts/TLV62569.yaml` (TLV62569DBVR): TI TLV62569 / TLV62569P SLVSDG1C (Oct 2017), LCSC C141836: pin functions (SOT23-5 DBV), 6.1 abs max, 6.3 recommended operating conditions (2.5..5.5 V), 6.5 electrical characteristics (IQ 35 uA, ISD 0.1 uA, VFB 0.6 V +-2 %, EN VIH 0.95..1.2 V, VIL 0.4..0.85 V, UVLO 2.3-2.45 V), 8.2 typical application (2.2 uH, 10 uF out)
- `specs/parts/BMP581.yaml` (BMP581): Bosch Sensortec BST-BMP581-DS004-13 (LCSC C5362283): Table 28 pin description, 3.x operating conditions (VDD 1.71..3.6 V, VDDIO 1.08..3.6 V), absolute maximum ratings (4.3 V), 7.x I2C address (0x46 SDO=0, 0x47 SDO=1)
- `specs/parts/ASM330LHH.yaml` (ASM330LHHTR): ST ASM330LHH DocID031239 Rev 3 (LCSC C459826): Table 2 pin description, Table 5 recommended operating conditions (Vdd 2.0..3.6 V, Vdd_IO 1.62..3.6 V), I2C address 1101010b with SA0 = GND
- `specs/parts/TP4056.yaml` (TP4056-42-ESOP8): NanJing Top Power TP4056 REV 2.4 (LCSC C16581): Absolute maximum ratings, Electrical Characteristics (VCC 4.0..8.0 V, IBAT = 1200/ RPROG ... 2.2 k -> 500 mA), pin functions
- `specs/parts/USBLC6-2SC6.yaml` (USBLC6-2SC6): ST USBLC6-2 Doc ID 11265 Rev 5 (Oct 2011, LCSC C7519): pinout figure, Table 1 Absolute ratings, Table 2 Electrical characteristics
- `specs/parts/ATGM336H.yaml` (ATGM336H-5N31): Zhongke Microelectronics ATGM336H-5N User Manual (LCSC C90770): 2.2 PCB layout, 2.4 pin definition, 2.7.2 passive antenna application circuit (external LNA AT2659), 3.x electrical characteristics (VCC 2.7..3.6 V typ 3.3, <25 mA tracking, peak 100 mA; VBAT 1.5..3.6 V; digital in max VCC+0.2 V)
- `specs/parts/DW01A.yaml` (DW01A): DW01A Li-ion battery protection IC datasheet (LCSC C351410, SOT-23-6): pin table (1 OD, 2 VM, 3 OC, 4 TD, 5 VCC, 6 GND), overcharge 4.30 V, overdischarge 2.50 V, typical application R1 100 ohm / C1 0.1 uF / R2 1 kohm
- `specs/parts/FS8205A.yaml` (FS8205A): Fuxin FS8205A dual N-channel MOSFET datasheet Ver2.1 (LCSC C908265, SOT-23-6L): 20 V, 6 A, RDS(on) 25 mohm at 4.5 V; pins 1 S1, 2 D, 3 S2, 4 G2, 5 D, 6 G1 (marking diagram, standard SOT-23-6 order)
- `specs/parts/AT2659.yaml` (AT2659S): Zhongke Microelectronics AT2659 GNSS LNA datasheet (LCSC C883443, SOT-23-6): pin table (1 RFIN, 2/3 GND, 4 RFOUT, 5 SHDN, 6 VDD), electrical characteristics (3.8-5.1 mA at SHDN = 1), reference circuit 470 pF input DC block + 6.8 nH shunt (also ATGM336H manual 2.7.2)