STMicroelectronics ST1PS03A1QTR, Step-Down Buck, 400 mA output, 1.8V to 5.5V input, Selectable output, Synchronous Rectifier, -40°C to 125°C, 12-TQFN (1.7x2) package, Surface Mount, ROHS3.
| Parameter | Value |
|---|---|
| Output type | Selectable |
| Mounting | Surface Mount |
| Voltage - input | 5.5V |
| Voltage - output | 3.3V |
| Voltage - output (Min (Fixed)) | 1.6V |
| Output current | 400mA |
| I/O channels | 1 |
| Operating temperature | -40°C ~ 125°C (TJ) |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Function | Step-Down |
| Topology | Buck |
| Case | 12-UFQFN |
| Output configuration | Positive |
| Synchronous rectifier | Yes |
The 12-TQFN with a 1.7x2 mm body is a fine-pitch, no-lead package. The exposed pad must be soldered to a copper plane on the PCB to carry the heat from the 400 mA output at high step-down ratios. The supplier device package is listed as 12-TQFN (1.7x2).
The ST1PS03A1QTR carries an Active lifecycle status with ROHS3 compliance.
The ST1PS03A1QTR is rated for 400 mA output. This is the continuous current capability at the selected output voltage within the 1.6V to 3.3V range.
The input voltage range is 1.8V minimum to 5.5V maximum. This covers single Li-ion, 3.3V, and 5V rails with margin.
It is supplied in a 12-TQFN package with a 1.7x2 mm body, surface-mount. The shipping options include Tape & Reel (TR) and Cut Tape (CT).