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TPS5430 Alternatives – Compatible Step-Down Converters
Most engineers looking at TPS5430 alternatives fall into one of three situations: the design needs synchronous rectification to drop the external Schottky diode, the input rail runs higher and needs more voltage headroom, or the project has moved to higher volumes and cost per unit matters. Each of those points to a different part. LMR33640, LMR33630, TPS62933, LMR51430, MP2307, and XL4016 each solve a different version of the problem — the table below shows where each one fits. We stock all of them, including the original TPS5430.
Direct/Similar Pin-Compatible Alternatives
If your PCB layout is fixed and a layout change is not an option, two parts share the same 8-pin SOIC PowerPAD footprint as TPS5430 and can be swapped without a respin.
| Part | Manufacturer | Input Voltage | Output Current | Key Difference | Stock |
| TPS5431 | Texas Instruments | 5.5V – 23V | 3A | Same pinout, lower max input voltage | In Stock |
| LMR33640 | Texas Instruments | 3.8V – 36V | 4A | Same SOIC PowerPAD footprint, synchronous, higher output current | In Stock |
TPS5431 is the closest pin-for-pin match – identical package, identical control scheme, the only difference is the maximum input voltage drops from 36V to 23V. If your design runs from a 12V or 24V rail and you need a confirmed second source with no layout change, TPS5431 is the answer.
LMR33640 uses the same 8-pin SOIC PowerPAD footprint and steps up the output current to 4A. It adds synchronous rectification, which removes the need for an external Schottky diode. Verify your compensation network before swapping, as the internal compensation characteristics differ from TPS5430.
Alternatives Comparison Table
| Part | Manufacturer | Input Voltage | Output Current | Switching Freq | Synchronous | Package | Recommended Level | Stock |
| TPS5430 | Texas Instruments | 5.5V – 36V | 3A (4A peak) | 500kHz fixed | No | 8-SO PowerPAD | Reference | In Stock |
| TPS5431 | Texas Instruments | 5.5V – 23V | 3A | 500kHz fixed | No | 8-SO PowerPAD | Highly Recommended | In Stock |
| LMR33640 | Texas Instruments | 3.8V – 36V | 4A | 400kHz / 1MHz | Yes | 8-SO PowerPAD | Highly Recommended | In Stock |
| LMR33630 | Texas Instruments | 3.8V – 36V | 3A | 400kHz – 2.1MHz | Yes | SOIC-8 / WSON | Recommended | In Stock |
| TPS62933 | Texas Instruments | 3.8V – 30V | 3A | 200kHz – 2.2MHz | Yes | SOT-583 | Recommended | In Stock |
| LMR51430 | Texas Instruments | 4.5V – 36V | 3A | 500kHz / 1.1MHz | Yes | SOIC-8 / WSON | Recommended | In Stock |
| MP2307 | MPS | 4.75V – 23V | 3A | 340kHz | Yes | SOP-8 | Recommended | In Stock |
| XL4016 | XLSEMI | 8V – 40V | 8A | 180kHz | No | TO-220 / SOP-8 | Recommended | In Stock |
Each Alternative Details
LMR33640 – Texas Instruments
Same 8-pin SOIC PowerPAD package as TPS5430, with synchronous rectification built in. Output current steps up to 4A, and the input range extends down to 3.8V. No external Schottky diode needed. The compensation network differs from TPS5430, so carry over your existing design with a bench check before committing to production.
LMR33630 – Texas Instruments
TI’s own recommended path for new designs that need synchronous rectification on a different footprint. Switching frequency is configurable from 400kHz to 2.1MHz via an external resistor, giving you more control over filter component size and EMI profile. No Schottky diode required. Layout change needed from TPS5430.
TPS62933 – Texas Instruments
Better pinout layout compared to older TI buck converters, which makes routing cleaner and reduces layout-induced EMI. Runs from 3.8V to 30V input, 3A output, with a wide frequency range of 200kHz to 2.2MHz. SOT-583 package is smaller than SOIC-8, useful when board space is tight. Layout change required.
LMR51430 – Texas Instruments
Designed for industrial environments. Operates up to 150°C junction temperature, with two fixed frequency options of 500kHz and 1.1MHz. Input range of 4.5V to 36V covers the same applications as TPS5430. A good choice when the end product needs to pass industrial temperature validation.
MP2307 – Monolithic Power Systems
The most common third-party alternative in the same current class, widely used in consumer and IoT products. Handles up to 23V input and delivers 3A continuous with internal compensation. Lower unit cost than TI parts. The 23V input ceiling is the main constraint — designs with a nominal 24V rail need to measure worst-case transients before committing.
XL4016 – XLSEMI
A different class of part that fits when the load has grown beyond TPS5430’s spec. Handles up to 40V input and 8A output at a lower 180kHz switching frequency, which means larger external components. Available in both TO-220 (through-hole) and SOP-8 (SMD) versions.
Selection Guide
If you need a pin-compatible swap with no layout change and your input stays below 23V:
Recommend TPS5431 – same footprint, same pinout, direct drop-in
If you need a pin-compatible swap and want synchronous rectification at the same time:
Recommend LMR33640 – same SOIC PowerPAD footprint, 4A output, no external Schottky diode needed
If you are starting a new design and want TI’s current recommended synchronous part:
Recommend LMR33630 – configurable frequency, lower EMI, no Schottky diode, TI’s preferred upgrade path
If board space is tight and your input stays below 30V:
Recommend TPS62933 – smaller SOT-583 package, cleaner layout, wide frequency range
If your end product needs industrial temperature certification:
Recommend LMR51430 – rated to 150°C junction temperature, same 36V input range as TPS5430
If BOM cost is the priority and your input stays below 23V:
Recommend MP2307 – proven in volume production, lower unit price
If your load current exceeds 3A or your input can spike above 36V:
Recommend XL4016 – 8A output, 40V input rating
If you need the original TPS5430:
We stock it and can quote it alongside any of the above
Risk Notes
Pin-compatible options (TPS5431 and LMR33640): Both share the 8-pin SOIC PowerPAD footprint with TPS5430 and can be swapped without a PCB change. TPS5431 is the safest swap — same control scheme, same compensation, lower input voltage ceiling. LMR33640 adds synchronous rectification, so verify the compensation network behavior on the bench before production.
Synchronous vs non-synchronous (Schottky diode): TPS5430, TPS5431, and XL4016 are non-synchronous and require an external Schottky diode on the output. All other alternatives on this page are synchronous and do not. If you are migrating to a synchronous part, remove the Schottky from your BOM and update your layout accordingly.
Input voltage ceiling (MP2307): Rated to 23V input. If your supply rail is nominally 24V, measure actual worst-case transients before qualifying this part. A brief overvoltage event above 23V can damage the device.
Switching frequency and EMI (XL4016): The 180kHz switching frequency sits in a range that can interfere with AM radio bands. Verify EMI margins if your product has RF compliance requirements.
Need a step-down converter alternative to TPS5430?
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In stock in SOIC-8 and compatible packages – TPS5430, TPS5431, LMR33640, LMR33630, MP2307, and XL4016 all available. Tell us your quantity and we will respond with pricing the same day.
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