LT3507AIFE#PBF

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LT3507AIFE#PBF application field and working principle

LT3507AIFE#PBF is a high efficiency, low noise, monolithic synchronous flyback regulator specifically designed for 5V to 36V input applications. The device typically operates with 100KHz switching frequency, allowing manageable component count and size. It features an output voltage range of 0.7V to 37V with tolerance of 0.5%, making it suitable for various applications, such as point-of-load regulation, white goods and industrial applications.

The LT3507AIFE#PBF is classified as a linear-switching PMIC (Power Management Integrated Circuit), which combines the advantages of both linear and switching regulators. In linear regulation, the output voltage is regulated by using a low dropouts (LDO) linear regulator, which reduces the noise introduced by switching regulators. Switching regulators, in the meantime, offer the efficiency and small-size advantages as compared to linear regulation. By combining the two types of regulation methods, a PMIC can offer better performance, wide range operating capabilities and flexibility.

The LT3507AIFE#PBF implements high frequency flyback switched capacitor circuit topology, along with an optimised low side switch-current limiting. It allows operation at low input voltages, while the low voltage drop across the switch enables efficient conversion. The regulator also features a wide output voltage range, with the ability to adjust the output voltage accurately over a large range. The adjustable input current limit allows applications to be designed to turn off the MX4507AIFE#PBF effectively at certain peak currents, eliminating damage caused by reversed current or shorted outputs.

The LT3507AIFE#PBF’s advanced control loop provides an excellent transient response, providing superior line and load regulation over the whole voltage range. Its low input voltage capability and fast transient response makes it ideal for high efficiency converter designs, even in demanding applications.

The LT3507AIFE#PBF incorporates a thermal shutdown feature to protect the device from prolonged over-current conditions. It also provides an adjustable output current limit to protect the power supply against shorted output or output overloading. In addition, the device has a low noise, oscillation free startup, providing reliable operation in various power supply designs.

The LT3507AIFE#PBF is also highly integrated, including synchronous rectification, current sense, built-in ESD protection and discrete P-Channel MOSFETs. Its high reliability, wide input voltage range and adjustable output voltage range makes it an ideal regulator for modern applications.

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