AMS1117-3.3: 1A Low Dropout Voltage Regulator, Fixed 3.3V, SOT-223/TO-252/SO-8
Advanced Monolithic Systems

The AMS1117-3.3 from Advanced Monolithic Systems is a fixed voltage regulator designed to deliver a steady 3.3V output while handling up to 1A of output current. Its low dropout voltage of maximum 1.3V, decreasing at lower load currents, makes it particularly suitable for applications where the input voltage is close to the output voltage, optimizing efficiency by minimizing power loss.

The device operates with a maximum dropout voltage of 1.3V, ensuring reliable performance even under conditions of varying input voltages and load conditions. The AMS1117-3.3 is engineered for simplicity and ease of use, requiring minimal external components for operation. It is protected against short-circuit and thermal overloads, enhancing system reliability. The regulator is available in several package options, including SOT-223, TO-252, and SO-8, providing flexibility in design for space-constrained applications.

Key Specifications and Features

  • Output Voltage: Fixed at 3.3V
  • Output Current: Up to 1A
  • Dropout Voltage: Maximum 1.3V
  • Line Regulation: 0.2% Max.
  • Load Regulation: 0.4% Max.
  • Package Options: SOT-223, TO-252, SO-8
  • Operating Junction Temperature Range: -40 to 125°C

AMS1117-3.3 Datasheet

AMS1117-3.3 datasheet (PDF)

AMS1117-3.3 Substitutes
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Applications

  • High Efficiency Linear Regulators
  • Post Regulators for Switching Supplies
  • 5V to 3.3V Linear Regulator
  • Battery Chargers
  • Active SCSI Terminators
  • Power Management for Notebook
  • Battery Powered Instrumentation

Category

Voltage Regulators

General information

Voltage regulators are essential components in electronic circuits, providing a stable output voltage regardless of variations in input voltage or load conditions. They are crucial for maintaining the reliability and performance of electronic systems. The AMS1117 series, including the AMS1117-3.3, is designed for applications requiring a low dropout voltage and high output current capability.

When selecting a voltage regulator, it's important to consider the output voltage and current requirements of the application, as well as the dropout voltage, which affects the efficiency of the regulator. The package type and thermal characteristics are also important factors, as they influence the regulator's performance and suitability for the intended application.

The AMS1117-3.3 is notable for its ability to deliver up to 1A of output current with a low dropout voltage, making it an excellent choice for applications where efficiency is key. Its compatibility with common package types and straightforward application circuitry makes it a versatile choice for designers.

In summary, the AMS1117-3.3 offers a combination of low dropout voltage, high output current capability, and reliability, making it a suitable choice for a wide range of applications where stable voltage is critical.

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