Manufacturer: Advanced Monolithic Systems

Key Specifications

• Package: SOT-223
• Output Voltage: 3.3V (fixed)
• Output Current: 1A (max)
• Dropout Voltage: 1.1V (typ at 1A)
• Input Voltage Range: 4.5V to 12V (to be verified)
• Line Regulation: 0.2% (typ)
• Load Regulation: 0.4% (typ)
• Operating Temperature Range: -40°C to +125°C (to be verified)

The AMS1117-3.3 from Advanced Monolithic Systems is a fixed-output low-dropout linear regulator designed for applications requiring a stable 3.3V supply from a higher input voltage. It delivers up to 1A of output current while maintaining a low dropout voltage, making it suitable for battery-powered devices, embedded systems, and various consumer electronics.

Key Features

• Fixed 3.3V output voltage
• Output current up to 1A
• Low dropout voltage (typically 1.1V at full load)
• Built-in current limiting and thermal shutdown protection
• Available in SOT-223 package for easy PCB mounting
• Wide operating temperature range (to be verified)

Applications

• Microcontroller power supplies
• Battery-powered equipment
• Networking and communication devices
• Industrial control systems

Selection Notes

When using the AMS1117-3.3, ensure the input voltage is sufficiently higher than 3.3V plus the dropout voltage (typically 4.3V or higher). Proper input and output capacitors are recommended for stability. For higher current or lower dropout requirements, consider other LDOs in the AMS1117 family. Verify exact specifications from the official datasheet before design-in.