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AMS1117-3.3 – 1A Low Dropout (LDO) Positive Voltage Regulator (SOT-223)

Voltage Regulators & PMICs · Advanced Monolithic Systems / AMS

AMS1117-3.3 – 1A Low Dropout (LDO) Positive Voltage Regulator (SOT-223)

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The AMS1117-3.3 is a popular low-dropout (LDO) linear voltage regulator designed to provide a stable, low-noise 3.3V fixed output from input voltages up to 15V. Capable of delivering up to 1A of load current with a dropout voltage of just 1.1V to 1.3V, it is the industry standard power management IC for microcontrollers (ESP8266, ESP32, STM32), logic level conversion, embedded systems, and consumer electronics.

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Delivery details

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7-day replacement Easy replacement for manufacturing defects
Cash on Delivery Available up to ₹10,000

Specifications

Brand Name
Advanced Monolithic Systems / AMS
Model ID
AMS1117-3.3
Sales Package
SOT-223 (3-Lead SMD with heat tab)
Compatible Devices
3.3V power rails for microcontrollers (ESP32, STM32), sensors, and wireless modules.
Primary Use
3.3V power rails for microcontrollers (ESP32, STM32), sensors, and wireless modules.
Additional Features
Fixed Output Voltage: Highly accurate 3.3V output (±1.5% tolerance). Current Capability: Delivers up to 1.0A continuous output current. Low Dropout Operation: Typical dropout voltage of 1.1V at 1A load Fast Transient Response: Optimized for rapid load variation recovery. Comprehensive Protection: Built-in internal current limiting and thermal overload shutdown. Compact Footprint: Industry-standard SOT-223 package suitable for high-density SMD board layouts.
Part Number / Marking
AMS1117-3.3 / 1117-3.3
Regulator Type
Positive Fixed Linear LDO
Input Voltage Range (V IN)
4.75V to 12.0V (Absolute max 15.0V)
Output Voltage (V OUT)
3.3V (±1.5% max initial accuracy)
Dropout Voltage ($V_{DO}$)
1.1V (typical) / 1.3V (max at $I_{OUT} = 1A$)

Product warranty

7-day replacement against manufacturing defects. Physical damage, burnt, or mishandled parts are not covered.

Replacement window: 7 days from delivery.

Description

  • Fixed Output Voltage: Highly accurate 3.3V output (±1.5% tolerance)

  • Current Capability: Delivers up to 1.0A continuous output current

  • Low Dropout Operation: Typical dropout voltage of 1.1V at 1A load

  • Fast Transient Response: Optimized for rapid load variation recovery

  • Comprehensive Protection: Built-in internal current limiting and thermal overload shutdown

  • Compact Footprint: Industry-standard SOT-223 package suitable for high-density SMD board layouts

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