LM2931CDR2G
Adjustable low dropout voltage regulators for precise power management
Manufacturer： ['rochester', 'onsemi']
series introduction
# Introduction to the LM2931CDR2G Product Series
## 1. Overview
The LM2931CDR2G is a highly reliable and efficient low - dropout (LDO) voltage regulator belonging to a well - regarded product series. LDO regulators are crucial components in modern electronic circuits as they provide a stable output voltage even when the input voltage is only slightly higher than the desired output voltage. This makes them ideal for a wide range of applications where power efficiency and voltage stability are of utmost importance.
## 2. Key Features
### 2.1 Low Dropout Voltage
One of the standout features of the LM2931CDR2G 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, this regulator can operate effectively even when the input voltage is close to the output voltage. For example, in battery - powered applications, as the battery voltage gradually decreases over time, the LM2931CDR2G can still provide a stable output, extending the useful life of the battery.
### 2.2 High Output Voltage Accuracy
The LM2931CDR2G offers high output voltage accuracy. It can precisely regulate the output voltage within a tight tolerance range. This accuracy is essential in applications where sensitive electronic components require a stable and well - defined power supply. For instance, in precision measurement equipment or microcontroller - based systems, any deviation in the power supply voltage can lead to inaccurate readings or improper functioning of the device.
### 2.3 Low Quiescent Current
Quiescent current is the current consumed by the regulator when there is no load connected to the output. The LM2931CDR2G has a low quiescent current, which means it consumes very little power in standby or low - load conditions. This feature is particularly beneficial in battery - powered devices, as it helps to conserve battery energy and increase the overall battery life.
### 2.4 Thermal Shutdown and Current Limiting
To ensure the safety and reliability of the regulator and the connected circuitry, the LM2931CDR2G is equipped with thermal shutdown and current - limiting protection features. Thermal shutdown protects the device from overheating by automatically shutting down the regulator when the temperature exceeds a certain threshold. Current limiting, on the other hand, prevents excessive current from flowing through the regulator, protecting it from damage due to short - circuits or over - loading.
## 3. Electrical Specifications
### 3.1 Input and Output Voltage Range
The LM2931CDR2G can accept a wide range of input voltages, typically from a few volts up to a specified maximum value. The output voltage is fixed at a specific value, which can be selected according to the application requirements. For example, common output voltage options may include 3.3V or 5V, which are widely used in various electronic systems.
### 3.2 Output Current Capacity
This regulator can supply a certain amount of output current, which is an important parameter for determining its suitability for different applications. The output current capacity of the LM2931CDR2G is sufficient to power a variety of loads, such as small - scale integrated circuits, sensors, and other low - power electronic components.
### 3.3 Line and Load Regulation
Line regulation refers to the ability of the regulator to maintain a stable output voltage when the input voltage changes. Load regulation, on the other hand, is the ability to keep the output voltage constant when the load current varies. The LM2931CDR2G exhibits excellent line and load regulation characteristics, ensuring a stable output voltage under different operating conditions.
## 4. Package and Pin Configuration
The LM2931
Images for reference
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