LT8612EUDE#PBF

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The LT8612EUDE#PBF is a high frequency synchronous buck-boost DC/DC switching regulator developed by Linear Technology corporation. It is categorized as a PMIC-Voltage Regulators-DC DC Switching Regulators device, intended for applications which require high efficiency power conversion. The device integrates a high frequency synchronous buck-boost switching regulator that permits seamless and efficient transition between step-down and step-up operating modes. It splits the input voltage into discrete elements and reconfigures them into a higher, lower, or equal output voltage through a constant-frequency current mode architecture.

The LT8612EUDE#PBF features integrated high side and low side N-Channel MOSFETs in order to reduce the part count and board area required and further enhance system efficiency. The output voltage is programmable and is adjustable from 0.6V to the input voltage. It also supports the input and output voltage range of 3.3V to 40V. The device not only offers logic controlled shutdown mode but is also ideal for high efficiency power systems with wide input voltage range and features integrated soft start and speed startup.

The LT8612EUDE#PBF also features efficient power conversion even at light loads where it utilizes Spread Spectrum Frequency Modulation mode to reduce the input/output ripple. It is synchronous to the pulse frequency modulation to reduce the noise. It also offers cycle-by-cycle current limit and short-circuit protection on either the input or output side. This particular device is specified for operation over the extended temperature range of -40C to 85C.

The LT8612EUDE#PBF device includes two output stages: an adjustable synchronous buck-boost and a fixed output linear regulator. The synchronous output is configurable using feedback pins to regulate the output voltage of the voltage regulator, while the linear regulator is adjustable via a resistor network. The synchronous section is typically used in applications where efficiency and low noise are both important. The linear regulation stage is used in applications where the input voltage is higher than the output voltage, with the goal of dropping the input voltage down to a level closer to the output voltage.

The operation of the synchronous buck-boost section is based on a constant-frequency current mode architecture which allows for efficient operation over a wide operating range, from full load step-down to ultra-low load step-up. The circuit features integrated high-side and low-side N-Channel MOSFETs for improved efficiency, lower part count, and reduced board area. Additionally, the device features a Logic-Controlled Shutdown (LCS) mode to allow the system to be powered from an external source and maintain load regulation, while the device is in shutdown mode.

The output of the LT8612EUDE#PBF is also adjustable via a small external resistor network. It’s also specified to operate over an extended temperature range of -40C to 85C, with a wide input voltage range of 3.3V to 40V. Furthermore, the device also includes a wide range of integrated protection features such as a cycle-by-cycle current limit, thermal shutdown, and short-circuit protection.

The LT8612EUDE#PBF from Linear Technology allows for efficient power conversion across a wide input voltage range and is an ideal solution for applications where high efficiency and low noise are essential. The device offers protection features such as a cycle-by-cycle current limit, thermal shutdown, and short-circuit protection, and is specified to operate over an extended temperature range of -40C to 85C. With its integrated architecture, the device helps reduce the part count and board area required, while its logic-controlled shutdown mode permits system powered from an external source even when the device is in shutdown mode.

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