LM5007SD

LM5007SD Application Field and Working Principle

Introduction

The LM5007SD is a synchronous buck regulator controller with 100V operating voltage and 60V rated voltage. It is part of Texas Instruments’ LM5007SD product family, which also includes controllers and regulators. The LM5007SD is a highly integrated and optimized solution for synchronous buck regulator applications. It is a “hands-free” controller that eliminates the need for additional external components, while providing a wide range of features and benefits.

Application Field

The LM5007SD is suitable for a wide range of applications, from general-purpose to automotive and industrial. Typical applications for the controller include PoE (Power over Ethernet) applications, FPGA core voltage regulation, Ethernet switching applications, as well as automotive and industrial motors, generators and other energy systems.

The LM5007SD also provides advanced system protection features, such as over-current protection, over-voltage protection, under-voltage lockout, current limiting and programmable soft-start. These features and parameters can be adjusted to suit the application.

Working Principle

The LM5007SD is a synchronous buck regulator controller based on the simplified buck regulator topology. It operates by regulating an input voltage, VIN, to a desired output voltage, VOUT, through a duty cycle of an internal switches, such as a FET. The duty cycle range is 1.5V to 100V and the switch frequency is adjustable from 500KHz to 1.5MHz.

The LM5007SD features a simplified synchronous buck controller design. The control loop is designed to precisely control the output voltage by utilizing the feedback from the output. The controller uses an external compensation network and the corresponding Amplitude Modulation (AM) control to regulate and precisely sustain the output voltage with low output voltage ripple and transient response.

The LM5007SD is designed to enable the user to quickly set up and build a complete synchronous buck regulator solution. It is also designed to optimize system size and efficiency for a variety of power conversion applications with a wide adjustment range of output current and output voltage. The on-chip adjustability of all system parameters results in faster and more precise design.

Conclusion

The LM5007SD is a highly integrated and optimized synchronous buck regulator controller suitable for a wide range of applications. With its high efficiency and low output voltage ripple, it is a viable solution for power conversion applications that require precise control over output voltage and current. Additionally, the LM5007SD offers user-friendly features, such as adjustable current limit, high-side gate addressing, over-current protection and programmable soft-start, in order to ensure easy setup and comprehensive system protection.