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Keep Output Voltage Steady with Pololu 12V Step-Up/Step-Down Voltage Regulator S18V20F12
The Pololu 12V Step-Up/Step-Down Voltage Regulator S18V20F12 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
- Wide input range: accepts roughly 2.9V to 32V (treat 32V as absolute max; 30V recommended due to reverse-voltage protection limit)
- Stable 12V output: fixed output with 4% accuracy
- Powerful when VIN is near 12V: typical max output current is about 2A when input voltage is close to the output (actual continuous…
- Efficient conversion: typical efficiency is 80% to 90% depending on VIN, VOUT and load
- Built-in protections: reverse-voltage protection (up to 30V), over-current protection, thermal shutdown (typically ~165°C), and…
- “2A” is not guaranteed at all VIN: max usable current depends on VIN vs 12V, efficiency, airflow, and ambient temperature (boosting from…
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 |
|---|---|---|---|
| S18V20F12 | Buck-Boost | 12 V | — |
| D24V22F12 | Buck | 12 V | 2.2 A |
| D36V28F12 | Buck | 12 V | 2.4 A |
| S13V25F12 | Buck-Boost | 12 V | 2.5 A |
| D42V55F12 | Buck | 12 V | 4.5 A |
| D24V150F12 | Buck | 12 V | 15 A |
| U3V16F12 | Boost | 12 V | — |
Technical specifications
| Product | Pololu 12V Step-Up/Step-Down Voltage Regulator S18V20F12 |
|---|---|
| Brand | Pololu |
| Model | S18V20F12 |
| Category | DC-DC Step-Up/Step-Down Regulator |
| Topology | Step-Down (Buck) |
| Output Voltage | 12 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 12V Step-Up/Step-Down Voltage Regulator S18V20F12
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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