Introducing the LT1945 Dual DC/DC Converter from Linear Technology

The LT1945 from Linear Technology is a versatile and powerful dual DC/DC converter designed to meet the needs of a wide array of applications. This compact, high-efficiency device integrates two independent switching regulators in a single package, making it an ideal solution for space-constrained applications that require multiple supply voltages.

Key Features

• Dual Independent Outputs: The LT1945 features two outputs, each capable of delivering up to 600mA of continuous output current. This allows for simultaneous generation of positive and negative outputs from a single input source.
• Wide Input Voltage Range: The device operates from an input voltage range of 2.5V to 12V, accommodating a variety of power sources, including single-cell Li-Ion batteries and multi-cell battery stacks.
• Adjustable Switching Frequency: The switching frequency can be adjusted up to 2MHz, enabling the use of small, low-cost capacitors and inductors while also providing a fast transient response.
• Low Quiescent Current: The LT1945 maintains a low quiescent current, making it suitable for battery-powered devices where power efficiency is critical.
• Integrated Boost and Inverting Switching Regulators: The integrated boost (step-up) and inverting (step-down) regulators allow for positive and negative outputs to be generated without the need for an external inverting charge pump.

Applications

The LT1945 is particularly well-suited for portable or compact devices that require dual power rails. Typical applications include:

• OLED Displays
• Portable Instruments
• Wireless Modems
• GPS Receivers
• Bipolar Amplifiers

Design Flexibility

Designers can take advantage of the LT1945's small footprint and low external part count to create compact, efficient power supply circuits. The device's internal switches and Schottky diodes minimize the need for external components, simplifying the design process and reducing overall system cost.

Conclusion

With its dual output capability, wide input voltage range, and high switching frequency, the LT1945 from Linear Technology stands out as a robust power management solution. Whether for industrial, medical, or consumer electronics, the LT1945 delivers the performance and reliability expected from a leader in power management technology.