Introducing the LT1937CES5 from Linear Technology

The LT1937CES5 is a high-performance, compact, step-up DC/DC converter designed by Linear Technology, now part of Analog Devices. This innovative component is specifically engineered to drive LEDs with a constant current for uniform brightness. Its small form factor and efficient power conversion make it an ideal choice for portable applications where space is at a premium and energy efficiency is crucial.

Key Features of the LT1937CES5

• High Efficiency: The LT1937CES5 boasts a high efficiency of up to 86%, which helps to minimize heat generation and extend battery life in portable devices.
• Wide Input Voltage Range: This converter operates over a wide input voltage range of 2.5V to 16V, accommodating a variety of power sources from single-cell lithium-ion batteries to multi-cell alkaline/NiMH configurations.
• Adjustable Output Voltage: The output voltage is adjustable up to 34V, making it versatile for driving multiple LEDs in series.
• Constant Current Drive: It ensures a constant current drive for LEDs, providing consistent light output and enhancing the longevity of the lighting components.
• Small External Components: The LT1937CES5 requires only a small inductor and capacitors, enabling a compact and lightweight design for the end product.
• Integrated Soft-Start: It features an integrated soft-start function that limits inrush current during startup, thereby improving system reliability.
• Low Shutdown Current: The device offers a low shutdown current of less than 1µA, which is essential for preserving battery life in portable applications when the device is not active.

Applications

The LT1937CES5 is particularly suitable for applications such as:

• Portable lighting
• Cellular phones
• Digital cameras
• Handheld computers
• GPS receivers
• Other battery-powered devices where efficient lighting is essential

With its robust design and flexible features, the LT1937CES5 from Linear Technology is an excellent choice for designers looking to integrate a reliable and efficient power solution for LED lighting into their portable devices.