Texas Instruments TPS5450DDA, a step-down buck regulator in 8-PowerSOIC (0.154", 3.90mm Width) — 5A output, adjustable from 1.221V to 31.32V, 500kHz switching, -40°C to 125°C junction temperature range.
| Parameter | Value |
|---|---|
| Output type | Adjustable |
| Mounting | Surface Mount |
| Voltage - input | 5.5V |
| Voltage - output | 31.32V |
| Voltage - output (Min (Fixed)) | 1.221V |
| Output current | 5A |
| Frequency | 500kHz |
| I/O channels | 1 |
| Operating temperature | -40°C~125°C(TJ) |
| Package | Tube |
| Function | Step-Down |
| Topology | Buck |
| Case | 8-PowerSOIC (0.154\", 3.90mm Width) |
| Output configuration | Positive |
| Synchronous rectifier | No |
The TPS5450DDA: This is a non-synchronous buck regulator delivering 5 A continuous output from an input spanning 5.5 V to 36 V. The 500 kHz fixed switching frequency sets the LC filter corner — a 10 µH inductor and 47 µF output capacitor are typical for a 5 V output.
As an active TI part, the TPS5450DDA is sourced through our distribution network. No single-source risk — the part is broadly stocked across multiple distributor channels.
The TPS5450DDA operates from a minimum input of 5.5 V to a maximum of 36 V. This wide range makes it suitable for 12 V and 24 V industrial buses, as well as regulated 5 V rails.
Yes, the 5.5 V to 36 V input range and adjustable output down to 1.221 V cover the 12 V to 5 V conversion directly. The 5 A output current handles most point-of-load needs at that voltage step.
Within TI's portfolio, the LMS3655MQURNLRQ1 is a functional peer with 5.5 A output and a wider -40°C to 150°C temperature range, but it is in a different package (QFN with wettable flank). The LMR33630APCQRNXRQ1 is a 3 A synchronous buck with higher 2.1 MHz switching, trading output current for smaller inductor size. Neither is a drop-in replacement — verify the PCB footprint and compensation before substituting.