LT8619EMSE-5#PBF

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The LT8619EMSE-5#PBF, is a cost-effective monolithic buck-boost regulator, available in a low-profile 5×5 QFN package with exposed paddle, that is capable of operating from input voltage sources ranging from 2.2V to 18V. This regulator provides a regulated output voltage between the input voltage source and ground, with +/-2% accuracy, and up to 6A of load current. It features high efficiency, low noise output and a wide operating temperature range.

The LT8619EMSE-5#PBF can be used as a voltage source, as well as a charge pump. It is capable of simultaneous voltage conversion and current limitation, making it suitable for applications that require a stable supply but have large, unpredictable current demands. It is also suitable for powering applications that require “bursts” of current during certain periods.

The LT8619EMSE-5#PBF is an ideal choice for applications requiring a compact, low-profile power solution. It has multiple control inputs, allowing for multiple regulation points, and is adaptable for use in a variety of applications, such as medical, industrial, automotive, consumer, and portable electronics.

The LT8619EMSE-5#PBF is designed using a fixed frequency, voltage mode control. Its reference voltage is generated from the input voltage, and its output voltage is set by an internal voltage divider. The duty cycle, the ratio of the on-time of the switch to the total period, is adjusted by an internal control loop, which compares the output voltage to the voltage reference, and feeds back an error signal to alter the on/off time of the internal switch.

The LT8619EMSE-5#PBF employs synchronous rectification, which reduces losses of the switch, leading to higher efficiency and a smaller heat sink requirement. The switching frequency can be varied internally, between 210kHz and 1.2MHz, and the output voltage is adjustable between 3V and the input voltage.

In summary, the LT8619EMSE-5#PBF is a highly customizable DC-DC buck-boost regulator, efficient, low-noise, floating, and adjustable. Its cost-effective, QFN-package and adjustable operating frequency makes it an ideal choice for applications that require different supply levels, optimized with regard to performance, power consumption, or form factor. It is suitable for use in a variety of industrial, automotive, consumer and portable applications.

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