LM1117IMPX-5.0/NOPB
5V 800mA low-dropout linear voltage regulators in SOT-223 package
Manufacturer： ['national-semiconductor', 'ti']
series introduction
# Introduction to the LM1117IMPX - 5.0/NOPB Product Series
## 1. Overview
The LM1117IMPX - 5.0/NOPB belongs to a family of low - dropout (LDO) voltage regulators. These regulators are crucial components in electronic circuits, designed to provide a stable and regulated output voltage regardless of variations in the input voltage or load current. The "LM1117" is the base part number, "IMPX" indicates a specific package type, "5.0" represents the fixed output voltage of 5.0 volts, and "NOPB" is related to the product's packaging and marking options.
## 2. Key Features
### 2.1 Low Dropout Voltage
One of the most significant features of the LM1117IMPX - 5.0/NOPB 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. For this product, the low dropout characteristic allows it to operate efficiently even when the input voltage is only slightly higher than the desired 5 - volt output. This is particularly useful in battery - powered applications where the battery voltage gradually decreases over time.
### 2.2 High Accuracy
The regulator offers high output voltage accuracy. It can maintain the output voltage within a tight tolerance range, typically ±1% or better. This high accuracy is essential in applications where precise voltage levels are required for the proper functioning of sensitive electronic components, such as microcontrollers, sensors, and communication modules.
### 2.3 Current Limiting and Thermal Shutdown
To protect the regulator and the connected circuitry, the LM1117IMPX - 5.0/NOPB is equipped with current - limiting and thermal - shutdown features. The current - limiting mechanism restricts the output current to a safe level in case of a short - circuit or over - load condition, preventing damage to the regulator. The thermal - shutdown feature automatically turns off the regulator when its temperature exceeds a certain threshold, protecting it from overheating and potential failure.
### 2.4 Low Quiescent Current
The quiescent current of the LM1117IMPX - 5.0/NOPB is relatively low. Quiescent current is the current consumed by the regulator when there is no load connected. A low quiescent current is beneficial in battery - powered applications as it helps to extend the battery life by reducing the standby power consumption.
## 3. Package and Pinout
### 3.1 Package Type
The "IMPX" package is a surface - mount package that offers several advantages. It is compact in size, which is suitable for modern printed circuit board (PCB) designs where space is often limited. The surface - mount design also allows for automated assembly processes, which can increase production efficiency and reduce manufacturing costs.
### 3.2 Pinout
The LM1117IMPX - 5.0/NOPB typically has three pins: the input pin (VIN), the output pin (VOUT), and the ground pin (GND). The input pin is connected to the unregulated input voltage source, the output pin provides the regulated 5 - volt output, and the ground pin is connected to the circuit's ground reference. The simple pinout makes it easy to integrate the regulator into various electronic circuits.
## 4. Applications
### 4.1 Battery - Powered Devices
Due to its low dropout voltage and low quiescent current, the LM1117IMPX - 5.0/NOPB is widely used in battery - powered devices such as mobile phones, tablets, portable media players, and wireless sensors. It can efficiently regulate the battery voltage to provide a stable 5
Images for reference
SOT223-3L
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