S13V20F5 5V Step-Up/Step-Down Regulator (2.8–22V In, up to ~2A)
Need a stable 5V rail even when your battery voltage goes above and below 5V? The Pololu S13V20F5 is a compact, high-efficiency buck-boost (step-up/step-down) regulator that turns 2.8V–22V into a regulated 5V output. Perfect for battery builds (1S/2S/3S), robotics, and portable projects where heat and efficiency matter.
Continuous current depends on VIN and cooling—use the output-current graph as your guide for “real world” loads.
Best for
- 5V projects powered from variable batteries (Li-ion, AA packs, USB power banks with sag)
- 5V sensors, microcontrollers, RF modules, small actuators
- Robots where you want less heat vs linear regulators
- Compact installs on breadboards and perfboards (0.1″ spacing)
Why/Benefits
- Buck-boost convenience: keeps 5V stable whether VIN is above or below 5V.
- High efficiency: typically 85–95% depending on VIN and load.
- Soft-start: limits inrush and ramps output smoothly.
- Protection built-in: input under-voltage lockout, output over-voltage protection, over-current protection, and over-temperature shutoff.
- Compact: double-sided assembly keeps it tiny but capable.
Technical specifications
| Model | 5V, 2A Step-Up/Step-Down Voltage Regulator S13V20F5 |
|---|---|
| Topology | Buck-boost (step-up/step-down) switching regulator (SMPS / DC-DC converter) |
| Input voltage | 2.8V to 22V |
| Output voltage | 5V (3% accuracy) |
| Typical max continuous output current | ~1A to 2.5A (depends on input voltage; thermal-limited) |
| Typical efficiency | 85% to 95% (VIN/load dependent) |
| No-load quiescent current | Typical 10–20 mA |
| Switching frequency | Fixed ~500 kHz |
| Current limit | 5A output current limit |
| Protections | UVLO, output OVP, over-current, over-temperature; soft-start |
| Size | 0.35″ × 0.475″ × 0.22″ (8.9 × 12.1 × 5.6 mm) |
| Connections | VIN, GND, VOUT (0.1″ / 2.54mm spacing) |
| Enable / reverse protection | No optional enable input; no reverse-voltage protection |
Pinout & power notes
- VIN: connect your source (2.8–22V). Keep wiring short/thick for higher current.
- VOUT: regulated 5V output.
- GND: common ground to your load/MCU.
- Thermals: max continuous current depends on VIN and airflow—give it breathing room for high loads.
FAQ
-
Can this power a 5V Arduino from a Li-ion battery?
Yes—this is exactly the use case: it boosts when the battery is below 5V and bucks when it’s above 5V (within current limits).
-
How much current can I really get?
Typical continuous current depends on VIN and heat. Check the “maximum continuous output current” graph for your input voltage.
-
Does it have an on/off (enable) pin?
No—only VIN/GND/VOUT. Use an external switch if you need hard on/off control.
5V, 2A Step-Up/Step-Down Voltage Regulator S13V20F5
5V, 2A Step-Up/Step-Down Voltage Regulator S13V20F5
Low stock: 1 left
Product Code
SKU:POL4085
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