LM5140QRWGTQ1

LM5140QRWGTQ1 Application Field and Working Principle

Introduction

LM5140QRWGTQ1 is a switched mode step down controller from Texas Instruments. This voltage regulator provides best-in-class efficiency and performance, ideal for micro-power converters. The device includes an array of integrated features, such as voltage and current regulation, allowing it to be used in a large number of applications.

Application Field

LM5140QRWGTQ1 is part of Texas Instruments PMIC - Voltage Regulators - DC DC Switching Controllers family. This device is ideal for a wide range of applications, such as step-down DC power conversion, including automotive, industrial and consumer applications.

LM5140QRWGTQ1 is ideal for high-efficiency, low power consumption with peak converters current capability. It provides various features such as programmable input voltage range and fast transient response, ideal for applications such as motor control, batteries and other power supply systems.

Working Principle

LM5140QRWGTQ1 is a step-down regulator. It has one of the most efficient designs among its family members, providing a switching frequency up to 1.2 MHz. This allows higher dynamic response and lower output voltage ripple.

LM5140QRWGTQ1 uses pulse-width modulation (PWM) to control output voltage and current. This process increases the output transistor on-time and decreases its off-time until the desired output voltage is achieved. This process is called Automatic Power-Saving Mode and helps regulate output voltage with high precision.

The device also uses an adjustable under-voltage lockout (UVLO) for both light-start and thermal protection. This feature makes the device immune to high-start up and shut-down transients, helping to limit peak current and optimize the performance.

Conclusion

LM5140QRWGTQ1 is a high-efficiency, low-power switched mode step-down voltage regulator. It is part of Texas Instruments’ PMIC - Voltage Regulators - DC DC Switching Controllers family and is suitable for a wide range of applications, such as step-down DC power conversion, motor control and batteries. The device utilizes rapid pulse-width modulation (PWM) and adjustable Under-Voltage Lockout (UVLO) for excellent performance and reliability.