LM2931CD2TG Series

series introduction

# LM2931CD2TG Product Series Introduction

## 1. Overview
The LM2931CD2TG belongs to a highly reliable and versatile series of low - dropout (LDO) voltage regulators. These regulators are designed to provide a stable output voltage in a wide range of electronic applications, ensuring the proper functioning of various components by delivering a consistent power supply.

## 2. Key Features

### 2.1 Low Dropout Voltage
One of the most significant features of the LM2931CD2TG series 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. With a low dropout voltage, these regulators can operate efficiently even when the input voltage is only slightly higher than the desired output voltage. This is particularly useful in battery - powered applications, where the battery voltage gradually decreases over time. For example, in a portable device running on a single - cell lithium - ion battery, as the battery discharges, the LM2931CD2TG can still provide a stable output voltage until the battery voltage drops close to the output voltage level.

### 2.2 High Output Voltage Accuracy
The LM2931CD2TG offers high output voltage accuracy. This means that the actual output voltage is very close to the specified nominal output voltage. High accuracy is crucial in applications where precise voltage levels are required for the proper operation of sensitive components such as microcontrollers, sensors, and analog circuits. For instance, in a sensor module, a stable and accurate supply voltage ensures that the sensor readings are reliable and consistent.

### 2.3 Low Quiescent Current
Quiescent current is the current consumed by the regulator when there is no load or a very light load connected to the output. The LM2931CD2TG series has a low quiescent current, which helps to conserve power, especially in battery - powered or energy - sensitive applications. In standby or sleep modes of a device, where the load current is minimal, the low quiescent current of the regulator ensures that the battery life is extended.

### 2.4 Thermal Shutdown and Current Limiting
To protect the regulator and the connected circuitry from damage, the LM2931CD2TG is equipped with thermal shutdown and current - limiting features. Thermal shutdown automatically turns off the regulator when the temperature exceeds a safe operating limit. This prevents overheating, which could otherwise lead to permanent damage to the device. Current limiting, on the other hand, restricts the output current to a safe level, protecting the regulator and the load from excessive current flow, such as in the case of a short - circuit.

## 3. Electrical Specifications

### 3.1 Input Voltage Range
The LM2931CD2TG can typically operate within a wide input voltage range. For example, it may support an input voltage range from 2.5V to 16V. This wide range allows it to be used in various power supply scenarios, whether it is powered by a low - voltage battery or a higher - voltage power source.

### 3.2 Output Voltage Options
The series offers a variety of output voltage options. Common output voltages include 1.8V, 2.5V, 3.3V, and 5V. This flexibility enables designers to choose the appropriate output voltage according to the requirements of their specific applications.

### 3.3 Output Current Capability
The regulator can typically supply a maximum output current of up to several hundred milliamperes. For example, it may be able to provide an output current of 100mA or more, depending on the specific model and operating conditions. This makes it suitable for powering a wide range of loads, from small - scale integrated circuits to moderately powered

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LM2931CD2TG