The LT1938EDD#PBF is a high-performance, fixed-frequency step-down switching regulator from Linear Technology, which is renowned for its robust and efficient power management solutions. This particular IC is designed to deliver a continuous output current up to 1.1A with a wide input voltage range of 3.6V to 36V, making it a versatile choice for diverse applications, from automotive to industrial systems.

Key Features

• Wide Input Voltage Range: The device operates efficiently across a broad range of input voltages from 3.6V to 36V, accommodating scenarios with fluctuating power supplies.
• High Output Current: It can supply a continuous output current up to 1.1A, which is ideal for powering small to medium-sized loads.
• Adjustable Switching Frequency: The switching frequency is adjustable from 300kHz to 2.2MHz, allowing flexibility in design and optimization of component size and efficiency.
• Low Shutdown Current: The IC features a low shutdown current of less than 1μA, which helps in reducing power consumption when the device is in standby mode.
• Thermal Protection: It includes thermal protection that shuts down the regulator to prevent damage from overheating.
• Stable with Low ESR Ceramic Capacitors: The regulator is designed to be stable with ceramic output capacitors, which are known for their low equivalent series resistance (ESR).

Applications

The LT1938EDD#PBF is suitable for a wide array of applications due to its high efficiency and reliable performance. Some common applications include:

• Automotive and industrial power systems
• Portable instruments and battery-powered devices
• Telecommunications equipment
• Distributed power systems

Package and Reliability

The device comes in a compact 10-lead DFN package with a 3mm x 3mm footprint. The small size makes it an excellent choice for space-constrained applications. Moreover, the LT1938EDD#PBF is characterized for operation from -40°C to 125°C, ensuring reliable performance across a wide temperature range.