Texas Instruments TPS62042DGQG4, Step-Down Buck Converter, Fixed 1.5 V Output, 1.2 A, 1.25 MHz, 10-PowerTFSOP/MSOP, -40°C to 85°C.
| Parameter | Value |
|---|---|
| Output type | Fixed |
| Mounting | Surface Mount |
| Voltage - input | 2.5V |
| Voltage - output (Min (Fixed)) | 1.5V |
| Output current | 1.2A |
| Frequency - switching | 1.25MHz |
| I/O channels | 1 |
| Operating temperature | -40°C~85°C(TA) |
| Package | Tube |
| Function | Step-Down |
| Topology | Buck |
| Case | 10-PowerTFSOP, 10-MSOP (0.118\", 3.00mm Width) |
| Output configuration | Positive |
| Synchronous rectifier | Yes |
The 1.2 A output rating is the continuous current the regulator can source at the fixed 1.5 V output. For a 1.2 A load at 1.5 V, the input current at 3.3 V nominal is about 0.6 A, so the upstream supply rail needs to budget for that plus the converter's quiescent draw.
The 1.25 MHz switching frequency means the inductor and output capacitor can be small, but the input decoupling cap should be placed close to the VIN pin to minimise input ripple.
Yes, the TPS62042DGQG4 is rated for 1.2 A continuous output current at the fixed 1.5 V output. The 1.25 MHz switching frequency and synchronous rectifier help maintain efficiency at that load level.