A reliable power supply is the foundation of any electronic system. The AMS1117-3.3V, a low dropout linear voltage regulator (LDO), has become a go-to solution for engineers seeking stable 3.3V output. With its simple structure, high performance, and cost-effectiveness, it is widely adopted in embedded systems, power modules, communication devices, and consumer electronics.
1. Product Overview: Fixed 3.3V Voltage Regulator with Proven Stability
The AMS1117-3.3V is a fixed output LDO regulator, ideal for stepping down 5V to 3.3V. It supports up to 1A of output current and features excellent thermal protection, low dropout voltage, and simple external component requirements.
Key Specifications:
| Parameter | Value |
| Output Voltage | Fixed 3.3V |
| Input Voltage Range | Up to 15V (recommended 5V~12V) |
| Max Output Current | 1A (recommended ≤800mA) |
| Dropout Voltage | ~1.1V @ 800mA |
| Quiescent Current | <5mA |
| Package Options | SOT-223, TO-252, TO-220 |
| Operating Temp Range | -40°C to +125°C |
2. Key Advantages
✅ High Accuracy & Stability
Maintains output within ±1% tolerance, suitable for precision circuits.
✅ Strong Drive Capability
Supports up to 1A current, perfect for powering chips and modules.
✅ Low Cost & High Availability
Excellent choice for budget-conscious projects.
✅ Multiple Package Options
Flexible choices to fit space-constrained or heat-dissipating designs.
3. Typical Applications
🔌 MCU Power Supply (e.g. STM32, ESP8266)
📶 Wi-Fi / Bluetooth / GPS Modules
📱 Consumer Electronics: Set-top boxes, IP cameras, smart gadgets
🌐 Networking Devices: Routers, switches, transceivers
⚙️ Industrial Controls: PLCs, sensor interfaces
4. Application Fit: Is AMS1117-3.3V Right for You?
| Application Scenario | Recommendation Reason |
| 5V to 3.3V Power Conversion | ✅ Ideal match |
| Noise-sensitive circuit | ✅ Performs well with bypass caps |
| Cost-sensitive projects | ✅ Excellent performance-per-dollar |
| Limited PCB space | ✅ SOT-223 offers compact layout |
💡 Pro Tip: Use 10µF ceramic capacitors on both input and output sides for improved stability.
5. Market Demand & Trend Outlook
Even though newer power ICs are emerging, the AMS1117-3.3V remains highly popular due to its balance of simplicity, cost, and reliability. It is still the preferred choice for:
- Rapid prototyping and DIY development boards
- Entry-level consumer products
- Educational and open-source hardware projects
Its continued use reflects the enduring value of tried-and-tested analog components.
6. Trusted Source: Where to Buy AMS1117-3.3V?
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7. Conclusion
Whether you are a hardware engineer or a procurement specialist, the AMS1117-3.3V remains a timeless and reliable LDO regulator. It delivers stable performance, easy integration, and unbeatable value in your 3.3V power designs. 👉 Don’t miss out — check real-time stock and pricing: https://www.xecor.com/product/ams1117-3-3v
