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Stable 5V Power for Embedded Builds
The 5V, 6A Step-Down Voltage Regulator D42V55F5 is a compact switching regulator for projects that need a lower and more stable DC rail from a higher input source.
It is a strong fit for robots, control boxes, battery-powered builds, and embedded systems that need efficient power conversion with less heat than a linear regulator.
Important: Choose a regulator based on your full input-voltage range, startup current, thermal limits, and required headroom. Real output current depends on input voltage, airflow, and temperature.
Why you'll love it
- Wide input range: 5–60V (minimum input depends on dropout under load)
- Accurate 5V rail: 5V output with 3% accuracy
- High current headroom: typical max continuous output current varies with VIN/thermals (about 5A–8A typical ; listed as 6A typical at 42V in)
- Efficient switching design: typically 80–95% efficiency depending on input and load
- Low idle draw: < 0.4mA typical no-load quiescent current
- Enable + low-power off: optional EN input can disconnect the load and reduce draw to <0.1mA typical
What you can build
Great for powering 5V or 12V rails in robots, controllers, sensor hubs, SBC projects, vehicle electronics, and custom battery systems.
Compare regulator options
| Model | Topology | Output | Max current |
|---|---|---|---|
| S13V20F5 | Buck-Boost | 5 V | 2 A |
| D24V22F5 | Buck | 5 V | 2.5 A |
| D36V28F5 | Buck | 5 V | 3.2 A |
| D30V30F5 | Buck | 5 V | 3.4 A |
| D24V50F5 | Buck | 5 V | 5 A |
| D42V55F5 | Buck | 5 V | 6 A |
| D24V90F5 | Buck | 5 V | 9 A |
Technical specifications
| Product | 5V, 6A Step-Down Voltage Regulator D42V55F5 |
|---|---|
| Brand | Pololu |
| Model | D42V55F5 |
| Category | DC-DC Step-Down Regulator |
| Topology | Step-Down (Buck) |
| Output Voltage | 5 V |
| Max Current | 6 A |
| Operating Voltage | 5-60 V |
| Support | Official Pololu product search and support resources linked below |
Official resources
Find this product on Pololu | Pololu support and resources
What’s in the box
1 × 5V, 6A Step-Down Voltage Regulator D42V55F5
Frequently Asked Questions
Can I power a microcontroller with this?
Yes, if the regulator’s output voltage and current match your controller and all attached loads.
Yes, if the regulator’s output voltage and current match your controller and all attached loads.
Will it run cool at full load?
It depends on input voltage, airflow, and load current. Check thermal limits in the official Pololu resources.
It depends on input voltage, airflow, and load current. Check thermal limits in the official Pololu resources.
Is this better than a linear regulator?
For many builds, yes. Switching regulators are usually more efficient and waste less heat.
For many builds, yes. Switching regulators are usually more efficient and waste less heat.
Manila stock. Order before 16:00 PHT, ships today via J&T or LBC. Provincial: 1–3 working days.
Schools / class POs: we accept Purchase Orders for accredited schools and universities. contact us with your PO details.
Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
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