Texas Instruments TPS62901RPJR, Step-Down Buck Regulator, Adjustable Output, 1A, 1MHz/2.5MHz Switching, 9-VFQFN, -40°C to 150°C.
| Parameter | Value |
|---|---|
| Output type | Adjustable |
| Mounting | Surface Mount |
| Voltage - input | 17V |
| Voltage - output | 5.5V |
| Voltage - output (Min (Fixed)) | 0.4V |
| Output current | 1A |
| Frequency | 1MHz, 2.5MHz |
| I/O channels | 1 |
| Operating temperature | -40°C ~ 150°C (TJ) |
| Package | Tape & Reel (TR) Cut Tape (CT) |
| Function | Step-Down |
| Topology | Buck |
| Case | 9-VFQFN |
| Output configuration | Positive |
| Synchronous rectifier | Yes |
At 2.5 MHz the regulator runs fast enough to use a small inductor, which saves board area and height. Dropping to 1 MHz cuts switching losses and improves efficiency at light loads.
Both are the same base device TPS62901. The RPJR suffix indicates the 9-VFQFN-HR package in Tape & Reel; the RPER suffix corresponds to a different reel or tube quantity option. Functionally identical — the choice is packaging and reel size for your pick-and-place line.
The LMR33630APCQRNXRQ1 is a 3A automotive-grade synchronous buck with a similar 2.1 MHz switching frequency and adjustable output, but it requires a higher minimum input voltage (3.8V) and has a lower maximum junction temperature (125°C). It is not a pin-compatible drop-in — the package and pinout differ — but it covers the same functional role for higher-current or AEC-Q100 designs.