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5V 3A Step-Up / Step-Down (Buck-Boost) Regulator — S13V30F5
When your power source can move above and below 5V (battery packs, USB power banks, 1–4 cell systems), a normal buck converter won’t cut it. The S13V30F5 is a high-efficiency buck-boost DC-DC regulator that keeps your output at a stable 5V while the input swings from 2.8V up to 22V. Perfect for makers who want one reliable 5V rail for sensors, microcontrollers, and 5V modules.
- Step-up + step-down in one: maintains 5V even when VIN drops below 5V.
- High efficiency: typically 85–95% depending on VIN and load—less heat and better battery life.
- Strong output capability: designed for up to ~3A continuous (thermal conditions matter; typical max continuous varies with VIN).
- Built-in protection: reverse-voltage protection (up to 20V), over-current/short protection, and over-temperature shutoff.
- Soft-start + protections: helps reduce inrush; includes input under-voltage lockout and output over-voltage protection.
- Enable (EN) pin: shut the regulator off for low-power standby (useful for battery builds).
Tip for low-VIN setups: some units can draw higher quiescent current around ~3.0–3.3V input. Keep wires short and add a small capacitor (tens of µF) close to VIN/GND to reduce the spike.
Why this is better than a typical “buck” module
Battery-friendly 5V rail
- Works with sources that start above 5V and discharge below 5V
- Helps prevent brownouts on 5V logic
- Excellent for portable builds and demos
Project-ready details
- EN pin for power saving / low-VIN cutoff tricks
- Reverse protection for wiring mistakes
- Mounting holes for clean installs
Technical specifications
| Input voltage | 2.8V to 22V |
|---|---|
| Output voltage | 5V fixed (±3% accuracy) |
| Output current | Up to ~3A continuous (thermally dependent; typical max continuous varies with VIN) |
| Typical efficiency | 85% to 95% (VIN/load dependent) |
| Switching frequency | ~500 kHz (fixed) |
| Reverse-voltage protection | Yes (up to 20V) |
| Protections | UVLO, output over-voltage protection, over-current/short, over-temp, soft-start |
| Dimensions | 0.9″ × 0.9″ × 0.38″ (22.9 × 22.9 × 9.7 mm) |
| Weight | ~3.5 g |
| Mounting | 2× 0.086″ holes (#2 / M2 screws) |
Pinout & power notes
- VIN → input positive (2.8–22V)
- GND → common ground
- VOUT → regulated 5V output
- EN → pull low to disable (low-power standby); leave as-is for normal operation
For high current: use short/thick wires, solid connectors, and avoid thin breadboard jumpers. Add a bulk capacitor near your load if you see dips on sudden load changes.
FAQ
-
When should I choose this instead of a buck converter?Choose this when your input can go below 5V (e.g., batteries discharging, power banks, variable sources). A buck-only regulator cannot maintain 5V if VIN drops under 5V.
-
Can it really do 3A?It’s designed for ~3A-class loads, but continuous current depends on VIN, airflow, and heat. Use good wiring and keep the module ventilated for best results.
-
Why does it get warm?All switching regulators dissipate some power. Higher current and larger VIN→VOUT conversion increases heat—improve airflow and wiring to reduce losses.
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.
Compatibility & downloads
// downloads
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