The LTC1147IS8-5 is a high-performance synchronous step-down switching regulator designed by Linear Technology, now part of Analog Devices. It is well-suited for applications requiring efficient power conversion, small footprint, and high reliability. This device is capable of delivering a continuous output current of up to 1.5A with excellent line and load regulation.

Key Features

• Voltage Output: The LTC1147IS8-5 provides a fixed output voltage of 5V, which is ideal for logic circuits and other standard 5V-operated devices.
• High Efficiency: With its synchronous rectification and Burst Mode® operation, this regulator achieves up to 94% efficiency, minimizing heat generation and power loss.
• Low Dropout Operation: This feature allows the regulator to maintain its output regulation even when the input-to-output voltage differential is very low, making it suitable for battery-operated systems.
• Wide Input Voltage Range: The device operates over a wide input voltage range from 3.5V to 30V, accommodating a variety of power sources including multi-cell batteries and industrial supplies.
• Adjustable Switching Frequency: The LTC1147IS8-5 allows the user to set the switching frequency anywhere between 100kHz and 200kHz through an external resistor, providing flexibility to optimize for efficiency or component size.

Applications

The LTC1147IS8-5 is suitable for a broad range of applications, including:

• Portable Electronics
• Automotive Power Systems
• Industrial Power Supplies
• Telecommunications Equipment
• Point of Load Power Conversion

Package Information

The regulator is offered in an 8-lead SOIC package with a part number LTC1147IS8-5. The SOIC package is designed for surface mount technology, providing a compact solution for space-constrained applications.

Additional Features

• No current sense resistor is required, reducing system complexity and improving efficiency.
• Thermal shutdown and current limit provide protection against overcurrent and overheating conditions.
• The device includes a power good output indicator, which can be used for power sequencing and fault signaling.

Overall, the LTC1147IS8-5 from Linear Technology is a versatile and reliable choice for anyone in need of a high-efficiency, low-dropout, synchronous step-down regulator.