Linear Technology's LT1937ES5#TR: A Compact, Efficient Boost Converter

The LT1937ES5#TR is a high-performance, current mode PWM boost DC/DC converter from Linear Technology, a leader in analog integrated circuits. This small and efficient component is designed to drive power LEDs from a single cell lithium-ion battery, making it an ideal choice for portable applications. Its compact size and high switching frequency enable the use of tiny, low-cost capacitors and inductors, resulting in a minimal footprint on the PCB.

Operating from an input voltage range of 2.5V to 16V, the LT1937ES5#TR can deliver output voltages up to 34V, and it maintains a constant current output to drive high brightness LEDs. The fixed frequency, current mode architecture ensures stable operation over a wide range of supply and output voltages. A frequency of 1.2MHz allows the LT1937 to use a small inductor and output capacitor, which are critical for space-constrained applications.

The device comes in a tiny ThinSOT-23 package, which is ideal for portable applications where space is at a premium. Additionally, the LT1937ES5#TR features internal soft-start functionality, which limits inrush current during startup, thereby reducing the stress on the input power source. This also prevents the output voltage from overshooting during startup, which is crucial for LED applications to ensure the longevity of the LED.

Other notable features of the LT1937ES5#TR include open LED protection, which prevents the converter from going into overvoltage shutdown if the LED load is disconnected. It also has over-temperature protection for enhanced reliability and a shutdown pin that reduces quiescent current to less than 1µA, extending battery life in portable applications.

Whether you're designing portable lighting, handheld devices, or any other application requiring a high-efficiency boost converter, the LT1937ES5#TR offers an excellent balance of performance, size, and ease of use. With its robust feature set and Linear Technology's reputation for quality, this component is an exceptional choice for your power conversion needs.