LTC3265MPDHC#TRPBF

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The LTC3265MPDHC#TRPBF is a high efficiency, multiphase synchronous, DC to DC buck switching regulator with integrated MOSFETs, suitable for wide range input applications. The part includes all the features necessary for the most demanding applications, from simple and advanced sequencing, to power management, current/voltage limiting, and thermal monitoring. With no external components, it is mechanically rugged, reliable, cost-effective, and suitable for many applications.

Application Field

The LTC3265MPDHC#TRPBF is ideal for providing power in many types of applications including point-of-load (PoL) and point-of-use (PoU) supplies, telecom base stations, 3G/4G and broadband wireless, medical systems, automotive, various distributed power architectures and more. With an integrated DC-DC controller and MOSFETs, the LTC3265MPDHC#TRPBF allows for the integration of multiple voltage rails with the same controller - thus reducing external components and lowering the overall system cost.

The LTC3265MPDHC#TRPBF is well-suited for providing power in a wide range of space-constrained and distributed power applications. Its MOSFET is rated to handle up to 10A peak, with constant current ratings up to 5A and input voltages up to 28V. The 1.2V to 5.5V output voltage range, with 0.05V increments, makes it perfect for powering other buck regulators, providing multiple bias levels, or just providing a single static output voltage.

The synchronous multiphase application for the LTC3265MPDHC#TRPBF is ideal for high power density and high-efficiency applications. The part includes all the features of a single-phase, but with the added benefit of improved system efficiency due to its split-phase architecture. The synchronous multiphase solution also features a patented dual-phase topology that seamlessly transitions from single-phase to multi-phase operation at light loads.

Working Principle

The LTC3265MPDHC#TRPBF is a synchronous multiphase buck-regulator based on a patented high-performance controller. It offers a simple and efficient design, with a minimal number of external components needed for operation. The part supports a wide range of input voltages and is designed to provide up to 5A of output current with flexible sequencing options. The device integrates an input voltage (VBST) supervisor, a 5V regulator circuit, two MOSFETs, a pair of push-pull driver circuits, and separate enable pins.

The DC-DC converter used in the LTC3265MPDHC#TRPBF is a synchronous buck converter with a unique dual-phase topology. This dual-phase topology encompasses both single and multiple paralleled phases output stages. It allows for seamless transition from single-phase to multi-phase operation, when the load is decreased. Furthermore, a unique synchronization mechanism is implemented in order to minimize the peak of inductor current and thus reduce design complexity.

The converter also uses a multi-bit voltage feedback mechanism to monitor the output voltage. This configuration provides accurate output regulation, as well as over-current protection. Additionally, the part implements load balancing, so that each phase will be automatically adjusted in order to equalize the power distribution among the phases.

As with other switching regulators, the LTC3265MPDHC#TRPBF will also include thermal protection with overtemperature shut down and short circuit protection. This feature ensures that the device will not overheat due to a short, while also providing protection against hazardous voltages.

The LTC3265MPDHC#TRPBF is designed to fit the needs of most applications, providing high efficiency and reliable power delivery. With integrated MOSFets, the part is ready for operation with minimal external components and is suitable for space-constrained and distributed power architectures. Its patented dual-phase architecture results in improved system efficiency, while also featuring configurable sequencing and current/voltage limiting.

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