LTC7899 Switching Regulator Controller

Introduction

The LTC7899 Switching Regulator Controller from Analog Devices Inc. is a robust and high-performance DC-DC controller designed to convert negative input voltages to positive outputs. With the ability to operate from input voltages up to 135V, this controller is ideal for a variety of demanding applications.

Part Description

The LTC7899 is a versatile controller that drives all N-channel synchronous MOSFET stages, making it suitable for both step-up (boost) operations and pass-through configurations. It features an integrated feedback level shifter that simplifies output voltage programming using just two resistors. The adjustable gate drive levels, ranging from 5V to 10V, allow for the use of both logic and standard-level MOSFETs, optimizing efficiency across applications.

Key features include:

• Wide input voltage range (4V to 135V)
• Low no-load quiescent current for extended battery life
• OPTI-LOOP compensation for improved transient response
• Spread-spectrum operation to minimize EMI
• Programmable frequency range from 100kHz to 2.5MHz

The LTC7899 is packaged in a compact 28-pin QFN format, making it suitable for space-constrained designs.

Applications

• Industrial power systems
• Military and avionics applications
• Telecommunications power systems

Industries

• Aerospace and Defense
• Telecommunications
• Industrial Automation

Usage Ideas

1. Battery-Powered Devices: Utilize the LTC7899 in a battery-powered application to efficiently convert negative input voltages to positive outputs, maximizing run time with its low quiescent current.
2. Telecommunications Equipment: Implement the LTC7899 in telecommunications power systems to ensure stable and efficient power conversion, meeting stringent EMI standards.
3. Industrial Control Systems: Design an industrial control system that leverages the LTC7899's adjustable dead times and frequency modulation capabilities for enhanced performance in demanding environments.

Conclusion

The LTC7899 Switching Regulator Controller is a powerful solution for converting negative input voltages to positive outputs in a variety of applications. Its high efficiency, flexibility, and compact design make it an excellent choice for industries ranging from telecommunications to military applications. With its advanced features and capabilities, the LTC7899 stands out as a reliable component for modern power management solutions.