Product Description: LM1117-3.3 1.0A Low-Dropout Positive Voltage Regulator

The LM1117‑3.3 is a high‑efficiency, low‑dropout linear regulator designed to deliver a stable 3.3 V output, with a maximum output current of up to 1 A. Its optimized internal circuitry supports an input‑output voltage differential as low as 1.4 V, making it ideal for power‑supply applications that demand both compactness and efficiency. The device features built‑in current limiting (typical value: 1.5 A) and thermal protection, effectively safeguarding the component against damage under overload or high‑temperature conditions and enhancing overall system reliability.

Product Model: LM1117-3.3
1.0 A Low-Dropout Positive Voltage Regulator

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Product Overview
The LM1117‑3.3 is a high‑efficiency, low‑dropout linear regulator designed to deliver a stable 3.3 V output, with a maximum output current of up to 1 A. Its internally optimized circuitry supports a minimum input‑to‑output voltage difference of just 1.4 V, making it ideal for power‑supply applications that demand both compact size and high efficiency. The device features built‑in current limiting (typical value: 1.5 A) and thermal protection, effectively safeguarding the component against damage under overload or high‑temperature conditions and enhancing overall system reliability.

Core Features

• High-precision output Output voltage: 3.3 V ±1%; load and line regulation are better than 0.4% and 0.2%, respectively.

• Wide input range : Supports input voltages from 4.8 V to 12 V, compatible with a wide range of power supply scenarios.

• Outstanding Performance : The dropout voltage is as low as 1.2 V (typical at a 1 A load), ensuring low-power operation.

• Multi-layered protection : Built-in overcurrent protection (1A–2A) and thermal shutdown function ensure device safety.

• Compact packaging : Uses an SOT-223 package, saving board space and ideal for high-density designs.

• Wide-temperature operation : Supports an operating temperature range of -40°C to +125°C, making it suitable for harsh industrial and consumer‑grade environments.

Key parameters

• Input voltage range : 4.8V–12V (maximum withstand voltage 13V)

• Output current : 1A (continuous)

• Quiescent current : ≤10mA

• Ripple Rejection Ratio : 60 dB (@1 A load)

• Package dimensions : 6.5mm × 3mm (SOT-223)

Typical Applications

• High-Efficiency Linear Regulated Power Supply

• Secondary-side voltage regulation in switch-mode power supplies

• Microcontroller and sensor power supply module

• Power Management for Portable Devices and Industrial Control Equipment

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Quality Commitment
The LM1117‑3.3 undergoes rigorous performance testing and quality control to ensure stable operation under challenging conditions, such as extreme temperatures and voltage fluctuations. Certified to industrial‑grade standards, it is widely used in consumer electronics, communication equipment, and industrial automation applications.

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Guangdong Jiaxun Electronics Co., Ltd.
Dedicated to power supply solutions, empowering high-performance designs!