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PMIC - Voltage Regulators - DC DC Switching Regulators

The LT8616EFE#PBF is a monolithic synchronous buck switching regulator with a wide input range of 6V to 80V. It features accurate regulation from a low dropout voltage, current mode control with 0.75MHz switch frequency and a check-sum circuit to maximize system reliability. Its small solution size makes it an excellent choice for space-constrained applications.

The LT8616EF#PBF provides excellent regulation and efficiency from a high-side PFET design. The voltage regulation is regulated by two external resistors and the output current is sensed by the on chip-current sense amplifier. The regulation accuracy is 0.1%, which is a requirement for automotive and commercial & industrial applications. It also has a minimum 2% peak-to-peak ripple and a maximum of 2V peak-to-peak.

The LT8616EF#PBF provides the optimal combination of size and performance with built-in thermal shutdown, under-voltage lockout, over current protection and adjustable frequency range. It also includes a check-sum circuit with a resulting reliability of 99%. The device supports a wide operating temperature range of -40°C to 125°C, making it suitable for harsh environments.

The LT8616EF#PBF provides a simple, flexible solution for point-of-load and power distribution applications. Its wide input voltage range and current mode control make it an excellent choice for synchronous buck applications, such as automotive, industrial and consumer electronics. The check-sum circuit is ideal for telecommunication and automotive applications where high-reliability is critical.

The LT8616EF#PBF is designed for low output voltage rails, such as 5V for powering microcontrollers and other electronics. For higher output voltages, it can be used in a boost configuration to regulate up to 80V. Its excellent efficiency and thermal performance make it an ideal solution for industrial, professional and consumer applications.

Working Principle: The LT8616EF#PBF is a synchronous buck regulator with current mode control. It has an internal voltage feedback signal and a logic signal (EN). It also includes over-current protection and thermal shutdown circuitry. When EN is driven high, the PFET driver turns on, allowing the current to be forced through the inductor, creating the voltage step-down. As the power passes through the inductor, a ripple current flows in the opposite direction, creating a voltage drop that is regulated by the voltage feedback signal. The output voltage is then compared to the voltage feedback signal and adjusted accordingly.

In applications where the input to output voltage difference is large, the LT8616EF#PBF can be used in a boost configuration to provide higher output voltages, up to 80V. This is done by adding an external capacitor connected between the input and output of the inductor. The boost converter then functions in the same way, but with a higher input voltage.

The LT8616EF#PBF is an efficient and compact voltage regulator and is suitable for a variety of applications. Its wide input voltage range and current mode control make it an excellent choice for synchronous buck applications. The check-sum circuit ensures high-reliability and the device can support a wide operating temperature range, making it ideal for harsh environments.

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