Manufacturer: Analog Devices

Key Specifications

• Package: 8-Lead DFN (3x3mm)
• Output Voltage: Fixed 5V
• Input Voltage Range: 4.2V to 40V
• Output Current: 1.2A
• Switching Frequency: 200kHz to 2MHz (programmable)
• Operating Temperature: -40°C to +125°C
• Synchronous Rectification: No
• Quiescent Current: 2.8µA (typical)

The LT3970IDDB-5#TRPBF from Analog Devices is a compact, high-voltage step-down switching regulator designed for robust power conversion in space-constrained applications. It operates from an input voltage range of 4.2V to 40V, making it suitable for automotive and industrial power rails. The device delivers a fixed 5V output with a continuous output current of up to 1.2A, ensuring reliable performance for a variety of loads.

Key Features

• Wide input voltage range: 4.2V to 40V
• Fixed 5V output voltage
• Output current up to 1.2A
• Programmable switching frequency from 200kHz to 2MHz
• Low quiescent current: 2.8µA (typical) for battery-powered applications
• Internal compensation and soft-start
• Thermal shutdown and current limit protection
• 8-Lead DFN package (3x3mm) for space-saving design

Applications

• Automotive power systems
• Industrial control supplies
• Battery-powered equipment
• Distributed power architectures
• Point-of-load regulation

Selection Guidance

When selecting the LT3970IDDB-5#TRPBF, consider the input voltage range and output current requirements of your system. The fixed 5V output simplifies design for 5V logic or sensor rails. The programmable switching frequency allows optimization between efficiency and component size. For higher output currents or different output voltages, other LT3970 variants may be considered. Ensure adequate input and output capacitance as per the datasheet recommendations to maintain stability and transient performance.