L4974A
Adjustable step-down switching regulators, 3.5A, 5.1-40V, 20-pin PDIP
Manufacturer： stm
series introduction
# L4974A Product Series Introduction
## 1. Overview
The L4974A product series represents a cutting - edge range of integrated circuits designed to meet the diverse and demanding requirements of modern power management applications. These devices are engineered with advanced semiconductor technology, offering high performance, reliability, and efficiency in a compact form factor.
## 2. Key Features
### 2.1 High - Efficiency Power Conversion
The L4974A series is equipped with state - of the - art power conversion circuitry. It can achieve high conversion efficiencies, typically up to 90% or more, depending on the operating conditions. This high efficiency not only reduces power losses but also helps in minimizing heat generation, which is crucial for the long - term reliability of the system. For example, in battery - powered applications, the high efficiency of the L4974A can significantly extend the battery life, allowing devices to operate for longer periods without recharging.
### 2.2 Wide Input Voltage Range
One of the standout features of the L4974A series is its wide input voltage range. It can accept input voltages from as low as [X] volts to as high as [Y] volts. This wide range makes it suitable for a variety of power sources, including different types of batteries, regulated power supplies, and even unregulated power sources. For instance, in automotive applications, where the battery voltage can vary depending on the charging state and the electrical load, the L4974A can handle these voltage fluctuations effectively.
### 2.3 Adjustable Output Voltage
The output voltage of the L4974A can be easily adjusted to meet the specific requirements of the application. This is achieved through external resistors or other control mechanisms. The adjustable output voltage feature provides flexibility, allowing the device to be used in a wide range of systems, from low - voltage microcontroller - based circuits to high - voltage power - hungry components. For example, in a multi - voltage system, the L4974A can be configured to provide different output voltages for different subsystems.
### 2.4 Over - Current and Over - Voltage Protection
To ensure the safety and reliability of the connected devices, the L4974A series is equipped with comprehensive over - current and over - voltage protection mechanisms. In case of an over - current situation, such as a short - circuit in the load, the device will automatically limit the current to a safe level, preventing damage to itself and the connected components. Similarly, if the output voltage exceeds a predefined threshold, the over - voltage protection circuit will kick in to safeguard the system.
### 2.5 Low Quiescent Current
The L4974A has a very low quiescent current, which is the current consumed by the device when it is in standby or idle mode. This low quiescent current is essential for battery - powered applications, as it helps to conserve battery energy when the system is not actively performing its main functions. For example, in a portable sensor device that spends most of its time in a low - power standby state, the low quiescent current of the L4974A can make a significant difference in the overall battery life.
## 3. Applications
### 3.1 Consumer Electronics
In consumer electronics, the L4974A series finds wide applications. It can be used in smartphones, tablets, and wearable devices to manage the power supply to different components such as the processor, display, and sensors. Its high efficiency and adjustable output voltage make it an ideal choice for these battery - powered devices, where power consumption and space are critical factors.
### 3.2 Automotive Electronics
Automotive applications require components that can withstand harsh environments and wide voltage variations. The L4974A's wide input voltage range
Images for reference
20-DIP
20-DIP (300 MIL)(NARROW PDIP MDIP) SERIES
Image Preview