LT1074HVIT7#35PBF

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LT1074HVIT7#35PBF is a DC/DC switching regulator integrated circuit (IC) from Analog Devices which is capable of providing a regulated output voltage from an input voltage source that is higher or lower than the output voltage. The device has an internal logic that regulates the output voltage by alternating the internal MOSFET as a switch. The LT1074HVIT7#35PBF is a cost-effective choice for most power management applications, especially in battery-powered equipment.

Features and Benefits

The LT1074HVIT7#35PBF provides many features and benefits including a wide input voltage range, low quiescent current, wide output voltage range, adjustable output voltage, fixed-frequency operation, current-mode architecture, programmable soft-start, undervoltage lockout, and current-limit protection with thermal shutdown. The device also has a high efficiency (>90%), making it suitable for space-sensitive applications. The IC operates from an input voltage range of 4V to 40V and is capable of producing output voltages between 0.6V and 37V with a maximum output current of 3A.

Application Fields

The LT1074HVIT7#35PBF DC/DC Switching Regulator is designed for applications such as power supplies for automotive electronics, battery chargers, portable medical equipment, consumer electronics, point-of-sale terminals, and 3.3V/5V/12V power supplies. The device is also suitable for consumer and industrial applications that require simple circuit design, high efficiency and low power losses.

Working Principle

The LT1074HVIT7#35PBF integrates an advanced current mode architecture which provides fast transient response and excellent line and load regulation. The device is driven by a constant frequency, peak current mode oscillator. An internal high-precision, low-power comparator compares the reference voltage with the voltage across an internal current-sensing resistor to generate the correct switching instruction for the internal MOSFET. The current-sensing resistor also acts as the feedback of the circuit and provides the regulation, loop compensation, and over-current protection.

The LT1074HVIT7#35PBF also integrates a programmable soft-start circuit which limits the start-up current to any pre-programmed value. The device also features programmable over-voltage and under-voltage lockout to prevent the output from supplying an excessive current during the start-up process. In addition, the LT1074HVIT7#35PBF also features current-limit protection with thermal shut-down which protects the MOSFET from being damaged due to an excessive current.

Conclusion

The LT1074HVIT7#35PBF DC/DC Switching Regulator is an ideal solution for cost-sensitive battery-powered applications that require an adjustable output voltage and high efficiency. This IC is suitable for automotive, consumer, industrial, and medical applications and features an advanced current mode architecture, wide input and output voltage range, low quiescent current, adjustable output voltage, fixed-frequency operation, programmable soft-start, and current-limit protection. The device also has high efficiency and thermal shutdown for added reliability.

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