Manufacturer: Texas Instruments

Key Specifications

• Package: SOIC-8
• Input Voltage Range: 6V to 100V
• Output Voltage Range: 1.2V to 90V
• Output Current: 1A
• Switching Frequency: Adjustable up to 1MHz
• Operating Temperature: -40°C to 125°C
• Synchronous Rectification: Yes

The LM5164DDAR from Texas Instruments is a synchronous step-down (buck) DC-DC converter designed for high-voltage industrial and automotive applications. It integrates both high-side and low-side power MOSFETs, enabling efficient power conversion without external Schottky diodes. The device operates over a wide input voltage range of 6V to 100V, making it suitable for systems with varying supply voltages, such as 12V, 24V, and 48V buses.

Key Features

• Integrated high-side and low-side MOSFETs for synchronous rectification
• Wide input voltage range: 6V to 100V
• Adjustable output voltage from 1.2V to 90V
• 1A continuous output current capability
• Switching frequency adjustable up to 1MHz for design flexibility
• Peak current-mode control for fast transient response
• Built-in protection: thermal shutdown, current limit, and input UVLO
• Available in SOIC-8 package for compact PCB layout

Applications

• Industrial power supplies
• Automotive battery systems
• Telecommunication equipment
• Distributed power architectures
• High-voltage point-of-load converters

Selection Guidance

When selecting the LM5164DDAR, consider the input voltage range, required output voltage and current, and thermal conditions. The device supports a wide input range, but ensure the input voltage does not exceed the absolute maximum rating of 100V. The output voltage is set by external resistors, and the switching frequency can be adjusted via an external resistor. For detailed design calculations, refer to the datasheet and application notes. The SOIC-8 package is suitable for moderate power dissipation; for higher current or higher ambient temperatures, thermal analysis is recommended.