L4931ABD50 - STMicroelectronics

Manufacturer Part Number

L4931ABD50

Manufacturer

STMicroelectronics

Introduction

The L4931ABD50 is a member of the power management integrated circuits (PMICs), specifically categorized under linear, low drop-out (LDO) voltage regulators. It is designed to offer a stable voltage supply with a low dropout feature, making it ideal for sensitive electronics where constant voltage is critical.

Product Features and Performance

Fixed output voltage of 5V, suitable for a wide range of applications.

Low dropout voltage of 0.8V at 250mA load, ensuring efficient operation close to the supply voltage.

Output current capacity of 250mA, suitable for light to moderately powered devices.

Low quiescent current of 1mA, minimizing power consumption when idle.

Excellent Power Supply Rejection Ratio (PSRR) of 70dB to 55dB across 120Hz to 10kHz, offering stable operation against supply noise.

Incorporates over-current and over-temperature protection, enhancing device safety and longevity.

Product Advantages

The low dropout feature enables efficient usage of power, reducing waste and heat generation.

High PSRR values ensure minimal noise in the output, crucial for sensitive applications.

Built-in protection features provide a higher level of reliability and safety for both the regulator and the downstream circuitry.

Key Technical Parameters

Voltage Input (Max): 20V

Voltage Output (Min/Fixed): 5V

Current Output: 250mA

Voltage Dropout (Max): 0.8V @ 250mA

Current Quiescent (Iq): 1 mA

PSRR: 70dB ~ 55dB (120Hz to 10kHz)

Quality and Safety Features

Over Current Protection: Guards against excessive currents that could cause damage.

Over Temperature Protection: Prevents overheating and potential failure.

Operating Temperature Range: -40°C ~ 125°C, suitable for harsh environments.

Compatibility

Designed for surface mount technology, making it compatible with modern printed circuit board (PCB) designs.

Application Areas

Consumer Electronics

Power Supply Modules

Automotive Electronics

Industrial Controls

Product Lifecycle

The L4931ABD50 is marked as obsolete. Alternatives or upgrades should be considered for new designs. Availability for existing projects may be limited.

Several Key Reasons to Choose This Product

The low dropout feature facilitates efficient operation, especially in battery-powered applications.

Excellent PSRR makes it suitable for noise-sensitive voltage supply lines.

Built-in safety features protect the device and the application, enhancing reliability.

Suitable for a wide range of applications, from consumer electronics to industrial controls, due to its robust performance characteristics.

Despite being obsolete, its performance and reliability make it a valuable choice for existing designs needing maintenance or minor updates.