The LT1937ES5 from Linear Technology is a highly efficient, compact LED driver IC designed to provide a constant current output for driving high brightness LEDs. Housed in a small TSOT-23 package, this device is perfect for space-constrained applications that require a reliable and consistent power supply for LED lighting solutions.

Key Features

• Wide Input Voltage Range: The LT1937ES5 operates with an input voltage range from 2.5V to 16V, making it versatile for various power supply conditions.
• Constant Current Output: It delivers a constant current to the LED, which is crucial for maintaining consistent brightness and color over time.
• High Efficiency: With efficiencies up to 85%, this LED driver ensures minimal power loss and heat generation, leading to a more reliable and longer-lasting LED application.
• Adjustable Output: The output current can be set with an external resistor, giving designers flexibility in their LED configuration.
• Low Shutdown Current: The device features a low shutdown current of less than 1µA, which is beneficial for battery-powered applications.
• Integrated Schottky Diode: An integrated Schottky diode reduces the need for external components, thus simplifying design and saving board space.

Applications

The LT1937ES5 is ideal for a variety of applications that require efficient and compact LED driving solutions. These include:

• Portable and handheld devices
• Automotive and avionic lighting
• Industrial displays and backlighting
• Small LCD displays

Design Advantages

Designers will appreciate the LT1937ES5 for its ease of use and integration into their LED lighting systems. The inclusion of internal features such as the Schottky diode and the ability to adjust the output current allows for a simplified design process and reduces the need for additional external components. Its high efficiency and low shutdown current make it an excellent choice for battery-operated devices where power conservation is critical.

Overall, the LT1937ES5 LED driver from Linear Technology stands out as a high-performance solution for driving LEDs in a wide range of applications where space, efficiency, and reliability are key concerns.