SNAU309 October 2025 LMK3H2108
The LMK3H2108 has multiple VDD and VDDO pins that operate from 1.8V ± 10% to 3.3V ± 10%. For both 1.8V and 3.3V operation, the on-board LDOs can be used to control the supply voltage. Alternatively, external power can be supplied through the VIN1 SMA connector. Table 2-2 describes the multiple power supply configurations.
| DESIGNATOR | DEFAULT POSITION | DESCRIPTION |
|---|---|---|
| JP24 | 1-2 |
1-2: Enable 1.8V LDO 2-3: Disable 1.8V LDO |
| JP10 + JT8 | 1-2 |
1-2: All VDDO_x sourced from 3.3V LDO 2-3: All VDDO_x sourced from 1.8V LDO 2-JT8: All VDDO_x sourced from VIN1 |
| JP15+ JT7 | 1-2 |
1-2: All VDD_x sourced from 3.3V LDO 2-3: All VDD_x sourced from 1.8V LDO 2-JT7: All VDD_x sourced from VIN1 |