AMS1117-3.3V SMD Fixed 12V 3.3V 800mA SOT-223 Dropout Regulators

are high-efficiency linear voltage regulators designed to provide a stable 3.3V output from input voltages up to 12V. These regulators are widely used in electronic circuits that require dependable low-noise power supply conversion, particularly in digital systems, microcontroller-based designs, communication modules, and embedded electronics. Known for their compact SOT-223 package and highly reliable performance, these regulators are considered new and rare, making them ideal for both prototype development and professional-grade electronics.

The AMS1117-3.3V SMD Fixed 12V 3.3V 800mA SOT-223 Dropout Regulators offer a low dropout voltage, making them extremely efficient for circuits where input voltage is only slightly higher than the required output. They deliver up to 800mA of continuous current, ensuring stable power delivery even in demanding applications. Their thermal protection, overload protection, and safe operating characteristics make them suitable for long-term use in mission-critical electronic devices.

Key Features

• Fixed 3.3V output from input voltages up to 12V.

• Low dropout voltage for improved efficiency.

• SMD SOT-223 package ideal for compact circuit designs.

• Capable of supplying up to 800mA continuous current.

• New and rare high-quality regulators suitable for professional projects.

• Built-in thermal and overload protection circuitry.

• Excellent line and load regulation for stable output.

Applications

• Microcontroller boards (Arduino, ESP8266, ESP32, STM32).

• Communication modules such as Wi-Fi, Bluetooth, and RF devices.

• Power supply circuits for sensors and digital ICs.

• Embedded systems and prototyping boards.

• Industrial control electronics.

• DIY electronics and circuit repair.

Advantages

• Highly stable 3.3V regulation with minimal noise.

• Compact footprint suitable for small PCBs.

• Safe operation due to integrated protection features.

• Works reliably in both hobby and industrial applications.

• Easy to solder and integrate in SMD designs.

Data Sheet

Electrical Specifications

• Input Voltage Range: Up to 12V

• Output Voltage: Fixed 3.3V

• Maximum Output Current: 800mA

• Dropout Voltage: Low, allowing efficient regulation

• Line Regulation: Excellent stability under voltage fluctuations

• Load Regulation: Maintains stable output with varying loads

• Protection: Thermal shutdown, current limiting

Package Information

• Package Type: SOT-223 SMD

• Mounting: Surface-mount technology

• Pins: Standard 3-pin regulator layout

• Heat Dissipation: Designed for improved thermal performance

Operating Conditions

• Operating Temperature: Standard electronic regulator range

• Recommended Use: Low-voltage digital circuits, regulated power supplies

• Storage: Keep in dry, static-free environment

Applications

• Post Regulator for switching DC/DC Converter

• High-Efficiency Linear Regulator

• Battery Chargers

• PC Add-on Card

• Motherboard clock supplies

• LCD Monitor

• Set-top Box

AMS1117-3.3V SMD Fixed 12V 3.3V 800mA SOT-223 Dropout Regulators Selection Notes

For more compatible parts, explore the components category at Electrolik. In addition, you can read more about voltage regulator to understand the circuit concept before choosing replacements.