Is there a pin-compatible replacement for TPS54308DDCR?

Yes, the LMR50410XDBVR shares the same SOT-23-6 package and pinout. However, it is not a drop-in replacement as its output current is only 1A compared to the TPS54308DDCR's 3A, and its switching frequency is different.

What risks should I check before replacing TPS54308DDCR?

Key risks include: 1) Output Current: Ensure the replacement can supply the required load current (target is 3A). 2) Switching Frequency: A different frequency requires recalculating external inductor and capacitor values. 3) Control Loop: Stability must be re-verified.

TPS54308DDCR Alternatives, Datasheet & Cross Reference | Texas Instruments

The TPS54308DDCR is a 28V, 3A synchronous step-down converter in a SOT-23-6 package. Finding a direct replacement requires careful matching of electrical parameters, especially the high output current, which is a key challenge for alternatives in this package.

AI replacement insight

Electrical riskhigh

Output current is 1A vs 3A. Switching frequency difference requires redesign of external components.

Package risklow

A pin-compatible SOT-23-6 option exists, simplifying PCB layout changes if the electrical downgrade is acceptable.

Can it be replaced directly?

No direct, drop-in replacement with 3A output current was found. The LMR50410XDBVR is pin-compatible but is a major downgrade to 1A output current.

Best replacement path

For applications needing less than 1A, the LMR50410XDBVR is a pin-compatible option to evaluate. For loads >1A, a redesign with a different part is required.

Main risk

The primary risk is the significant output current mismatch. Using a 1A part in a 3A application will cause failure.

Recommended alternatives

Pin-compatible but offers lower 1A output current. Suitable for lower power applications only.

View details

Alternative comparison matrix

Feature / factor	TPS54308DDCR	LMR50410XDBVR	Compatibility / risk
Package	SOT-23-6	SOT-23-6	SOT-23-6 — Package matches.
Pinout	Pin-compatible	Pin-compatible	Pin-compatible — Pinout appears identical based on datasheet review.
Current	3A	1A	1A — Significant downgrade in output current.
Voltage	4.5V to 28V	4V to 36V	4V to 36V — Wider input voltage range.
Switching Frequency	350kHz	700kHz	700kHz — Different frequency requires recalculating external components.

Application & sourcing insights

Questions & answers

For low-power applications (<1A), the LMR50410XDBVR is a pin-compatible option from Texas Instruments, but it is a significant downgrade from 3A. For full 3A performance, a redesign with a different part is likely necessary.