LTC3728LEUH-1#PBF Dual 550kHz Synchronous Step-Down Switching Regulator

The LTC3728LEUH-1#PBF is a high-performance dual synchronous step-down switching regulator from Linear Technology, designed to deliver efficient power management for a variety of applications. This regulator is capable of providing two independent output voltages from a single input, making it an ideal choice for systems that require multiple supply voltages with high efficiency and compact size.

With a wide input voltage range from 2.75V to 9.8V, the LTC3728LEUH-1#PBF can accommodate a broad spectrum of power sources, including lithium-ion batteries, multi-cell alkaline/NiCd/NiMH, or regulated 5V and 3.3V rails. Each of its two outputs can deliver up to 2A of continuous current, supporting a variety of digital and analog circuits.

The device operates at a fixed frequency of 550kHz, which allows for a good balance between efficiency and component size. The use of high-frequency switching enables the use of small surface-mount inductors and capacitors, which reduces the overall footprint and design complexity of the power supply circuit. The LTC3728LEUH-1#PBF also features internal soft-start to minimize inrush current during startup, thereby protecting downstream components and extending system reliability.

Another key feature of this regulator is its synchronous operation, which enhances efficiency by eliminating the need for an external Schottky diode. This is achieved by using internal top and bottom high-efficiency N-channel MOSFET switches. The LTC3728LEUH-1#PBF also offers a Burst Mode® operation that significantly improves efficiency at light loads, making it suitable for battery-powered applications where extending battery life is crucial.

For protection, the LTC3728LEUH-1#PBF includes overcurrent and overvoltage protection, ensuring the safety and longevity of both the regulator and the system it powers. The device is offered in a compact 36-lead QFN package, which is ideal for space-constrained applications.

In summary, the LTC3728LEUH-1#PBF from Linear Technology is a versatile and efficient solution for dual-output voltage regulation, offering high performance, compact size, and a range of features designed to meet the demands of modern electronic systems.