AMS1117-3.3

The AMS1117-3.3 is a low dropout linear voltage regulator from UMW, providing a fixed 3.3V output. This regulator is ideal for applications requiring a stable and reliable power supply. It features high efficiency and a low dropout voltage, making it suitable for various electronic devices and systems.

Pinout

(Note: The pin configuration below is a general representation. Refer to the specific datasheet for precise details.)

• Input (IN): Voltage input pin.
• Ground (GND): Common ground pin.
• Output (OUT): Regulated 3.3V output pin.

Circuit Diagram

A typical application circuit for the AMS1117-3.3 includes input and output capacitors to ensure stability and transient response. The capacitors should be placed close to the regulator pins to minimize inductance.

Key Features

• Fixed Output Voltage: Provides a stable 3.3V output.
• Low Dropout Voltage: Typically 1.1V at 1A output current.
• Current Limiting: Integrated current limit protection.
• Thermal Shutdown: Built-in thermal overload protection.
• High Efficiency: Designed for efficient power conversion.
• Easy to Use: Simple design with minimal external components.

(Note: For detailed technical specifications, refer to the AMS1117-3.3 datasheet.)

Application

Power Supply for Microcontrollers: Provides stable power to microcontrollers and digital circuits. ▪ Consumer Electronics: Used in devices such as TVs, DVD players, and set-top boxes. ▪ Battery-Powered Devices: Suitable for portable electronics and battery-operated equipment. ▪ Networking Equipment: Powers routers, switches, and other networking devices. ▪ Industrial Automation: Used in industrial control systems and automation equipment.

Functionality

The AMS1117-3.3 is designed to provide a regulated 3.3V output from a higher input voltage with low dropout, ensuring stable operation even in varying input conditions. Its internal current limiting and thermal shutdown features protect the device from overload and overheating, enhancing reliability and safety in various applications.

Usage Guide

• Input Voltage: Connect the input voltage (typically higher than 4.4V) to the IN pin.
• Output Capacitor: Use a capacitor (typically 10μF) on the output pin to maintain stability.
• Ground Connection: Ensure a solid ground connection for optimal performance.
• Heat Dissipation: Ensure proper heat dissipation to avoid thermal shutdown, especially in high current applications.

Frequently Asked Questions

Q: What is the maximum output current of the AMS1117-3.3?

A: The AMS1117-3.3 can provide up to 1A of output current.

Q: What is the dropout voltage of the AMS1117-3.3?

A: The typical dropout voltage is 1.1V at a 1A output current.

Q: Can the AMS1117-3.3 be used with ceramic capacitors?

A: Yes, the AMS1117-3.3 can be used with ceramic capacitors for input and output decoupling.

Q: Does the AMS1117-3.3 require a heatsink?

A: In applications with high current or significant heat generation, a heatsink or proper thermal management is recommended to prevent thermal shutdown.