LM1117IDTX-3.3
Low dropout linear voltage regulators for stable 3.3V power supply
Manufacturer： ['national-semiconductor', 'rochester', 'ti']
series introduction
# Introduction to the LM1117IDTX - 3.3 Product Series
## 1. Overview
The LM1117IDTX - 3.3 belongs to a highly reliable and widely - used series of low - dropout (LDO) voltage regulators. These regulators are designed to provide a stable and precise output voltage, making them an essential component in a vast array of electronic circuits and systems. The "3.3" in the part number indicates that this particular regulator is configured to output a fixed voltage of 3.3 volts, which is a common voltage level required by many modern integrated circuits, microcontrollers, and other electronic devices.
## 2. Key Features
### 2.1 Low Dropout Voltage
One of the most significant features of the LM1117IDTX - 3.3 is its low dropout voltage. Dropout voltage is the minimum difference between the input voltage and the output voltage required for the regulator to maintain a stable output. In the case of the LM1117IDTX - 3.3, it can operate with a relatively small dropout voltage, typically around 1.2 volts at a load current of 800 mA. This means that it can efficiently regulate the output voltage even when the input voltage is only slightly higher than the desired 3.3 - volt output. As a result, it is suitable for applications where the input voltage may vary or where power efficiency is crucial.
### 2.2 High Output Accuracy
The LM1117IDTX - 3.3 offers high output voltage accuracy. It can maintain the output voltage within a tight tolerance, usually ±1% over a wide range of operating conditions. This high accuracy is essential for applications that require precise voltage levels, such as in sensitive analog circuits, digital signal processors, and communication devices. The accurate output voltage ensures the proper functioning and reliability of these devices.
### 2.3 Current Limiting and Thermal Shutdown
To protect both the regulator and the connected load, the LM1117IDTX - 3.3 is equipped with built - in current limiting and thermal shutdown features. The current - limiting function restricts the output current to a safe level, preventing excessive current flow that could damage the regulator or other components in the circuit. The thermal shutdown feature automatically turns off the regulator when its temperature exceeds a certain threshold, protecting it from overheating and potential damage. These protection mechanisms enhance the overall reliability and durability of the product.
### 2.4 Adjustable and Fixed Output Options
While the LM1117IDTX - 3.3 is a fixed - output regulator with a 3.3 - volt output, the LM1117 series also offers adjustable output versions. This flexibility allows designers to choose the most suitable option for their specific application requirements. The adjustable versions can be configured to provide a wide range of output voltages by using external resistors, making them suitable for a broader range of design scenarios.
## 3. Electrical Specifications
### 3.1 Input Voltage Range
The LM1117IDTX - 3.3 can accept an input voltage in the range of typically 4.75 volts to 12 volts. This wide input voltage range makes it compatible with various power sources, such as batteries, power supplies, and other voltage - generating circuits. It can handle different input voltage levels while still providing a stable 3.3 - volt output.
### 3.2 Output Current
The regulator can supply a maximum output current of up to 800 mA. This makes it suitable for powering a variety of medium - power electronic devices. Whether it is a small microcontroller, a sensor module, or a low - power communication device, the LM1117IDTX - 3.3 can provide the necessary
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TO-252-3
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