LT3507AIUHF#PBF

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LT3507AIUHF#PBF Application Field and Working Principle

The LT3507AIUHF#PBF is a low quiescent current, high efficiency synchronous step-down DC/DC converter IC that belongs to the category of PMIC (Power Management IC) - Voltage Regulators - Linear + Switching. This type of IC is designed to convert a high input voltage into a lower output voltage while maintaining high efficiency. The LT3507AIUHF#PBF features wide input voltage range, high load current, fast load step response, and low quiescent current, making it suitable for many power management applications, such as portable devices, servers and networking equipment.

Input Range and Design

The LT3507AIUHF#PBF has a wide input voltage range of 4.5V to 32V and is capable of supplying up to 3A of output current. It also has an adjustable output voltage setting from 0.8V to 5V. The IC is available in a thermally-enhanced 5mm x 6mm, 24-pin QFN package, which is perfect for applications that require a small form factor.

Working Principle

The LT3507AIUHF#PBF DC/DC converter works on the principle of a synchronous step-down buck converter. The device operates at a fixed frequency of 1.2MHz, which is adjustable through external control. The device has an internal low RDS(on) MOSFET and works by modulating the duty cycle of the MOSFET switch, to maintain an output voltage proportional to the duty cycle and the supply voltage. The device also has an adjustable soft-start feature, preventing large inrush current to the load, and allowing a smooth start-up.

Protection Features

The LT3507AIUHF#PBF DC/DC converter also features a range of integrated protection functions such as output over-voltage protection, over-temperature protection, output current limit and input under-voltage protection. These protections safeguard the IC and connected circuit from a variety of common failure conditions.

Applications

The LT3507AIUHF#PBF DC/DC converter is suitable for a variety of applications, such as servers, networking equipment and portable devices. It can be used in applications where high efficiency and low quiescent current are required, such as notebook computers and tablets. The device is also suitable for industrial applications where wide supply voltage is a requirement, such as LED lighting and point-of-load voltage regulators. The device is also suitable for battery-powered applications and wireless charging applications.

Conclusion

The LT3507AIUHF#PBF is a high efficiency, low quiescent current synchronous step-down DC/DC converter IC that belongs to the category of PMIC (Power Management IC) - Voltage Regulators - Linear + Switching. The device has wide input voltage range and high output current capabilities, making it suitable for a wide range of applications, such as servers, networking equipment and portable devices. The integrated protection features make the device secure in a variety of failure conditions and the adjustable soft-start feature avoids excessive inrush current. The device is available in a small form factor and is suitable for applications that require space optimization.

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