The LT1940NFS is a versatile dual DC/DC converter integrated circuit from Linear Technology, designed to cater to the demanding requirements of modern electronic applications. This high-performance chip is engineered to provide efficient power conversion with minimal external components, making it an ideal solution for space-constrained designs.

Key Features

• Wide Input Voltage Range: The LT1940NFS operates from an input voltage range of 2.6V to 16V, accommodating a variety of power sources from single-cell Lithium-ion batteries to fixed 12V power supplies.
• Dual Independent Outputs: It features two independent output channels with switch currents of 1.2A and 2.6A, respectively, providing flexibility in delivering power to different parts of the system.
• High Frequency Operation: With a switching frequency of up to 1.1MHz, the LT1940NFS allows for the use of small, low-cost inductors and capacitors, reducing the overall solution footprint and cost.
• Stable with Low ESR Capacitors: The converter is stable with ceramic output capacitors, ensuring reliable performance even with low equivalent series resistance (ESR) components.
• Low Dropout Operation: The low dropout operation is a critical feature for continuous power supply even when the input voltage is close to the output voltage, maximizing battery life.

Applications

The LT1940NFS is suitable for a broad range of applications, including:

• Portable and handheld devices
• Digital cameras and audio devices
• Telecommunications equipment
• Industrial and automotive systems

Package and Reliability

The LT1940NFS comes in a compact 16-lead narrow SSOP package, which is ideal for space-constrained applications. The device features internal thermal shutdown and current limiting to protect against over-temperature and over-current conditions. Its robust design ensures reliable operation in diverse environments and applications.

Conclusion

The LT1940NFS from Linear Technology is a powerful and efficient solution for dual-output DC/DC conversion needs. With its high-frequency operation, stability with low ESR capacitors, and robust protection features, it stands out as an excellent choice for designers looking to optimize power management in their electronic products.