LTC3402EMS#TR - High Efficiency, 2.25MHz Synchronous Step-Down Regulator from Linear Technology

The LTC3402EMS#TR is a high-performance, synchronous step-down regulator that is designed to deliver continuous output currents up to 600mA. Manufactured by Linear Technology, a leader in the design and production of high-performance analog integrated circuits, this regulator operates at a switching frequency of 2.25MHz which allows for a compact footprint using small, low-cost capacitors and inductors while providing a low noise operation.

The device is optimized for battery-powered systems with its wide input voltage range from 2.5V to 5.5V, making it ideal for single cell Li-Ion or multi-cell alkaline/NiCd/NiMH applications as well as for 3.3V or 5V input rails. The LTC3402EMS#TR provides high efficiency over a wide range of load currents, thanks to its internal synchronous rectification and its low RDS(ON) internal switches.

One of the key features of the LTC3402EMS#TR is its very low no-load quiescent current, which is crucial for maximizing battery life in portable applications. Additionally, the device offers a 100% duty cycle in dropout, further extending battery runtime. The regulator also includes a Burst Mode® operation that reduces quiescent current to just 25μA during light load conditions, thus providing even greater efficiency.

The LTC3402EMS#TR comes in a compact 10-lead MSOP package with a thermally efficient exposed pad, ensuring proper heat dissipation even in high current applications. Its small size and high switching frequency enable designers to reduce the overall solution footprint, making it a perfect choice for space-constrained applications like handheld devices.

Protection features of this regulator include a current mode control loop that provides fast transient response and cycle-by-cycle current limit. There's also an internal soft-start to limit inrush current during startup, thermal protection, and overvoltage protection, all of which contribute to the safe and reliable operation of the device.

Overall, the LTC3402EMS#TR is a versatile and robust solution for applications requiring a high-efficiency, compact, and reliable power supply. Its performance and features make it suitable for a wide array of portable devices, including PDAs, cellular phones, digital cameras, and other battery-operated equipment.