TPS5405DR
Texas Instruments
Needs validationhigh risk
Functionally different; fixed 5V output and higher min input voltage.
Best Alternatives to TPS54231DR
Finding a replacement for the TPS54231DR requires careful review of its adjustable output and 570kHz frequency. Many alternatives are fixed-voltage and require circuit changes.
AI replacement insight
Electrical riskhigh
Fundamental differences in output type (fixed vs. adjustable), switching frequency, and temperature ratings.
Package risklow
Most candidates share the SOIC-8 package, but pin functions are not compatible.
Can it be replaced directly?
No direct drop-in replacements were found. All reviewed candidates are fixed-voltage regulators, while the TPS54231DR is adjustable, requiring different external circuitry and pin functions.
Best replacement path
Search for adjustable buck regulators with 2A output, >=28V input, and a similar 570 kHz switching frequency. Check pin compatibility for feedback and enable pins.
Main risk
The primary risk is substituting a fixed-voltage regulator for the adjustable TPS54231DR, which will not work without a complete redesign of the power stage feedback network.
Recommended alternatives
7Alternative comparison matrix
| Feature / factor | TPS54231DR | TPS5405DR | XL1509-12E1 | XL1509-5.0E1 | Compatibility / risk |
|---|---|---|---|---|---|
| Voltage | 3.5 V to 28 V | 6.5 V to 28 V | 4.5 V to 40 V | 4.5 V to 40 V | 6.5 V to 28 V / 4.5 V to 40 V / 4.5 V to 28 V — Significantly higher minimum input voltage.; XL1509-12E1: Higher minimum input voltage.; XL1509-5.0E1: Higher minimum input voltage.; TPS5403DR: Higher minimum input voltage. |
| Temperature | -40°C to 150°C | -40°C to 125°C | -40°C to 85°C | -40°C to 85°C | -40°C to 125°C / -40°C to 85°C — Reduced thermal margin.; XL1509-12E1: Significantly reduced thermal margin.; XL1509-5.0E1: Significantly reduced thermal margin.; TPS5403DR: Reduced thermal margin. |
| Current | 2 A | 2 A | - | - | 2 A / 1.7 A — matched; TPS5403DR: Lower output current capability. |
| Switching Frequency | 570 kHz | - | 150 kHz | 150 kHz | 150 kHz — Requires new external components (inductor, caps).; XL1509-5.0E1: Requires new external components (inductor, caps). |
Application & sourcing insights
Questions & answers
A suitable alternative must be an adjustable 2A buck regulator supporting a >=28V input. Consider other parts in TI's TPS54x series or similar parts from other vendors, verifying pinout and external component values.