AMS1117-5.0 Voltage Regulator IC ⚡

The AMS1117-5.0 is a reliable, low-dropout (LDO) linear regulator that delivers a stable 5.0 V output for a wide range of electronics components and modules. Designed for both professional engineers and hobbyists, it supports up to 1 A load current and integrates robust protection features. Ideal for powering microcontroller boards, sensor modules, and peripherals in Arduino and Raspberry Pi projects.

Key Features 🔑

• Precise 5.0 V regulation: Ensures dependable, consistent voltage for sensitive circuits.
• Low dropout voltage: 1.3 V at 800 mA for efficient operation with modest headroom.
• High output current: Supplies up to 1 A to drive a variety of loads.
• Built-in protections: Thermal overload safeguard and short-circuit current limiting 🛡️.
• Compact SOT-223 package: Space-saving footprint suitable for dense PCB layouts.

Technical Specifications 📊

• Output Voltage: 5.0 V (fixed)
• Dropout Voltage: 1.3 V at 800 mA
• Output Current: 1 A
• Operating Temperature: -40°C to +125°C
• Package Type: SOT-223

Typical Applications 🧩

• Mobile devices: Smartphones, tablets, and handheld electronics.
• Personal computing: Desktop and laptop subsystems requiring a regulated 5 V rail.
• Networking equipment: Routers, switches, and access points.
• Consumer electronics: TVs, gaming consoles, digital cameras, and set-top boxes.
• Maker projects: Powering Arduino, ESP32, STM32, and sensor modules in Raspberry Pi ecosystems.

Design and Integration Notes 🔧

• Input headroom: Ensure Vin ≥ 5.0 V + dropout (depends on load). For 800 mA, allow at least 1.3 V headroom.
• Thermal management: Power dissipation is P = (Vin − 5.0 V) × Iout. Use adequate copper area/heatsinking on the SOT-223 pad to manage heat.
• Stability components: Use appropriate input/output capacitors as recommended in the datasheet (commonly around 10 µF low-ESR) for stable operation.
• Protection awareness: Built-in thermal shutdown ♨️ and current limit protect the device and downstream circuits.