LT1945IMS#PBF - Dual DC/DC Converter

The LT1945IMS#PBF is a versatile and high-performance dual DC/DC converter integrated circuit (IC) from Linear Technology, which is now part of Analog Devices. Designed to cater to a wide range of applications, this IC features two independent switching regulators that provide efficient power conversion with adjustable outputs.

Key Features

• Wide Input Voltage Range: The device can operate from an input voltage range of 2.5V to 12V, making it suitable for applications powered by single-cell lithium-ion batteries, multi-cell alkaline or nickel-metal hydride batteries, or regulated 5V and 12V power supplies.
• Dual Outputs: It offers two outputs with different configurations: one inverting (-1.25V to -34V) and one boost (2.5V to 34V), which can be adjusted according to the application requirements using external feedback resistors.
• High Switching Frequency: The switching frequency of 1.2MHz allows for the use of small inductors and capacitors, reducing the overall footprint and component cost on the PCB.
• Low Shutdown Current: An ultra-low shutdown current of less than 1µA helps in preserving battery life in portable applications when the device is not active.
• Independent Shutdown and Soft-Start Functions: Each converter has independent shutdown and soft-start capabilities, providing design flexibility and protection during power-up sequences.

Applications

The LT1945IMS#PBF is ideal for a variety of applications, including:

• Battery-powered equipment
• Portable instruments
• Medical devices
• Negative voltage generation
• Positive and negative LCD bias supplies

Package and Reliability

The device comes in a compact 10-lead MSOP package, which is suitable for space-constrained applications. Its robust design ensures reliable performance over a wide temperature range, making it a dependable choice for both commercial and industrial applications.

Overall, the LT1945IMS#PBF from Linear Technology is a powerful solution for designers looking to implement a dual-output power supply with high efficiency, minimal external components, and a small footprint.