
Texas Instruments
A pin-compatible but lower-rated alternative with a 3A switch current limit and a maximum input voltage of 18V.
The TPS55340PWPR is a versatile 5A, 40V non-synchronous DC-DC converter supporting Boost, SEPIC, and Flyback topologies. Finding a direct drop-in replacement requires careful review of key electrical parameters.
Significantly lower input voltage and current ratings.
Package and pinout are compatible based on datasheet evidence.
No direct, 1-to-1 replacement with identical or better specs was found. The closest option, TPS61175PWPR, is a downgrade.
Use TPS61175PWPR as a pin-compatible downgrade for less demanding applications, or redesign with a different part for full performance.
The primary risk is using a lower-rated part (TPS61175PWPR) which could fail if the system's voltage or current exceeds its limits.

Texas Instruments
A pin-compatible but lower-rated alternative with a 3A switch current limit and a maximum input voltage of 18V.
| Feature / factor | TPS55340PWPR | TPS61175PWPR | Alt 2 | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | HTSSOP-14 | HTSSOP-14 | HTSSOP-14 — Package matches. | ||
| Topology | Boost, SEPIC, Flyback | Boost, SEPIC, Flyback | Boost, SEPIC, Flyback — Functional topology matches. | ||
| Voltage | 2.9 V to 32 V | 2.9 V to 18 V | 2.9 V to 18 V — Candidate has a lower maximum input voltage. | ||
| Current | 5 A | 3 A | 3 A — Candidate has a lower switch current limit. | ||
| Temperature | -40°C to 150°C | -40°C to 125°C | -40°C to 125°C — Candidate has a lower maximum operating temperature. |
The TPS61175PWPR is a pin-compatible option from Texas Instruments, but it is a downgrade with a lower 3A current limit and 18V maximum input voltage. It is suitable only if your application's requirements are within these lower limits.