LT1937ES6#TR - High Efficiency LED Driver

The LT1937ES6#TR from Linear Technology is a compact, high-efficiency, fixed-frequency step-up DC/DC converter designed to drive LEDs with a constant current. This device is housed in a small ThinSOT-23 package, making it an ideal choice for space-constrained applications. The LT1937ES6#TR is capable of driving up to five white LEDs from a single Li-Ion cell, or up to four LEDs from a NiMH/NiCd or alkaline source, making it perfect for portable applications such as handheld devices, digital cameras, and other battery-powered equipment.

Key Features:

• Constant Current LED Driver: Ensures uniform brightness and maximizes LED life by providing a steady current.
• Wide Input Voltage Range: Operates from inputs between 1V to 10V, accommodating various battery chemistries and configurations.
• High Switching Frequency: A switching frequency up to 1.2MHz allows for small external components, reducing the overall solution footprint.
• High Output Voltage: Capable of generating up to 36V, this driver can support several LEDs in series.
• Integrated Schottky Diode: Built-in low V<sub>F Schottky diode improves efficiency and simplifies the design.
• Low Quiescent Current: Draws a low operating current, which is beneficial for battery-powered applications.
• Shutdown Mode: Features a shutdown mode that reduces the supply current to under 1µA, extending battery life.

Applications:

The LT1937ES6#TR is versatile and can be used in a variety of applications, including:

• Portable Lighting
• Cellular Phones
• Digital Cameras
• Handheld Computers
• Small LCD Backlights

Quality and Reliability:

Linear Technology is known for its commitment to quality, and the LT1937ES6#TR is no exception. It is designed to meet high standards of performance and reliability, ensuring a long operational life in the field.