The LT1173 is a versatile DC-DC converter designed and manufactured by Linear Technology, a company renowned for its high-performance analog integrated circuits. This converter is a practical solution for a wide range of applications, including battery-powered devices, portable instruments, and power backups, thanks to its ability to perform both step-up and step-down voltage conversions efficiently.

Key Features

• Adjustable switching frequency from 100kHz to 100MHz, allowing flexibility in choosing inductor size and efficiency.
• Wide input voltage range from 2.0V to 12V, making it suitable for single-cell Li-ion batteries as well as multi-cell battery configurations.
• High output voltage up to 34V, which is ideal for LCD bias supplies and other high-voltage applications.
• Low quiescent current of just 110µA, which enhances battery life in portable applications.
• High efficiency maintained over a wide range of output currents, ensuring optimal performance in various load conditions.
• Ability to use small, low-cost inductors and capacitors, reducing the overall footprint and cost of the power supply design.

Applications

The LT1173's flexible design makes it particularly well-suited for a variety of applications. It can be used in:

• Portable power devices
• Power backups and uninterruptible power supplies (UPS)
• Handheld instruments
• Automotive accessories
• Low-power on-board DC-DC conversion

Design Advantages

Designers will appreciate the LT1173's minimal external component requirement, which simplifies the design and development process. The device's internal 1.25A switch eliminates the need for external power transistors, further streamlining the design. Additionally, its thermal protection and current limiting features ensure safe operation under abnormal conditions, providing a reliable solution for critical applications.

With its combination of versatility, efficiency, and ease of use, the LT1173 from Linear Technology stands out as a robust choice for designers looking to create compact and efficient power supply solutions.