LT3042IDD#TRPBF

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The LT3042IDD#TRPBF is a high-performance Adjustable/Fixed Low Dropout Linear Regulator that uses an advanced CMOS process to produce an ultra-high performance, miniature package solution. It provides excellent falling load and dropout performance, with an adjustable output range of 0.8 to 36V, and a fixed output range of 2.5, 5, 12 and 15V. The LT3042IDD#TRPBF is a dual-channel output that allows for easy sequencing and/or simultaneous operation for better efficiency, as well as adding additional features such as soft-start, overcurrent and overvoltage protection, and built-in temperature monitoring.

Application Field

The LT3042IDD#TRPBF is ideal for point of load (POL) applications due to its excellent load transient and dropout performance. This package is designed for applications where space is a constraint, such as powering FPGAs, ASICs, DSPs, embedded processors and other logic devices. The dual-channel output allows for easy sequencing and/or simultaneous operation, which makes it well suited for medical equipment, automotive and other transportation applications.

Working Principle

The LT3042IDD#TRPBF works by adjusting the output voltage to maintain a regulated output while drawing a minimum amount of current from the input supply. The device has an on-board voltage reference and error amplifier. This allows the device to accurately regulate the output voltage to a very tight tolerance of ±2%. The output current limit and the overvoltage protection are adjustable, within the range of 0.7-36V and 0.7-45V respectively. The LT3042IDD#TRPBF also feature a soft-start function, which reduces the inrush current and eliminates output voltage overshoot.

The LT3042IDD#TRPBF architecture also features a hysteretic mode for light load current. The device switches between the hysteretic and linear modes depending on the load current. The hysteretic mode allows the device to reduce quiescent current and maintain the output voltage, even at very low load currents. This improves efficiency at light load currents.

Conclusion

The LT3042IDD#TRPBF is a high-performance, ultra-small package design with excellent load transient and dropout performance. The device is ideal for applications where space is a constraint, such as powering FPGAs, ASICs, DSPs and embedded processors. In addition to its excellent performance, the dual-channel output, adjustable output range and on-board temperature monitoring provide additional features for improved design flexibility. The LT3042IDD#TRPBF is also designed with a hysteretic mode to improve designed efficiency at light load current.

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