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Keep Output Voltage Steady with Pololu 3.3V Step-Up/Step-Down Voltage Regulator S7V8F3
The Pololu 3.3V Step-Up/Step-Down Voltage Regulator S7V8F3 keeps output voltage steady even when the input moves above or below the target level.
That makes it a good choice for battery systems, mobile robots, and field devices that need dependable power across a wide input range.
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
- Buck-boost topology: regulates 3.3V when VIN is higher, lower, or equal to 3.3V
- Efficient: typical efficiency is over 90% (often ~80–95% depending on VIN/load)
- Useful current range: typically delivers 500mA to 1A across most input/output combinations; up to ~1A continuous when stepping down (VIN…
- Low power draw: power-saving feature keeps efficiency high at light loads (quiescent current < 0.1mA)
- Protection built-in: short-circuit protection + thermal shutdown
- SHDN pin: pull low to disable for low-power standby; can be tied to VIN or left floating to stay enabled
What you can build
Useful for battery-powered devices, mobile robots, field instruments, and portable systems where the input can move above and below the target output.
Compare regulator options
| Model | Topology | Output | Max current |
|---|---|---|---|
| D36V6F3 | Buck | 3.3 V | — |
| S7V8F3 | Buck-Boost | 3.3 V | — |
| D24V5F3 | Buck | 3.3 V | — |
Technical specifications
| Product | Pololu 3.3V Step-Up/Step-Down Voltage Regulator S7V8F3 |
|---|---|
| Brand | Pololu |
| Model | S7V8F3 |
| Category | DC-DC Step-Up/Step-Down Regulator |
| Topology | Step-Down (Buck) |
| Output Voltage | 3.3 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 × Pololu 3.3V Step-Up/Step-Down Voltage Regulator S7V8F3
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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