LTC3129EUD-1#PBF

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Introduction

The LTC3129EUD-1#PBF is a high-efficiency DC-DC switching regulator with an input voltage range of 2.25 to 40V. With up to 3A output current, the device operates at a switching frequency of up to 1MHz. The device’s wide input voltage range makes it an ideal choice for applications such as industrial, communications, battery-powered, automotive, backup and mission-critical systems.

Features

The LTC3129EUD-1#PBF is a highly integrated-switching regulator designed to deliver high efficiency performance at up to 3A output current. The device features a wide input voltage range, programmable switching frequency, dynamic voltage scaling, adjustable output voltage and current limit. The device also provides adjustable soft start, enable and tracking control. The device’s low-noise operation makes it ideal for applications requiring low-noise operation, such as communications, audio and video systems.

Applications

• Industrial applications
• Communications applications
• Battery powered applications
• Automotive applications
• Backup applications
• Mission-critical systems

Working Principle

The device operates by turning on a power switch oscillator and driving it at a frequency determined by its switching frequency setting. A feedback loop senses the output voltage and adjusts the output voltage to match its target value. The device is designed to eliminate modifications needed to the input voltage source due to the presence of the feedback loop which allows the output voltage to remain unaffected by changes in load current or line voltage.

The device includes an adjustable current limit setting that limits the output current to a safe maximum level. The current limit can be adjusted to improve efficiency and reduce component temperature. The adjustable soft-start feature ensures that the output voltage rises in a controlled fashion from its initial reset state by ramping the output voltage at a predetermined rate. In cases where the input voltage exceeds the output voltage, the device reduces power dissipation by using a synchronous-rectifier to converter the input voltage to the output voltage.

Conclusion

The LTC3129EUD-1#PBF is an integrated-switching regulator targeted for industrial, communications, battery-powered, automotive, backup, and mission-critical applications that require high efficiency performance while operating at up to 3A output current. Its wide input voltage range, programmable switching frequency, dynamic voltage scaling, adjustable output voltage, and adjustable soft start make it an ideal choice for applications. Additionally, the device offers adjustable current limit and synchronous-rectifier to reduce power dissipation.

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