LTM4645IY#PBF Datasheet/PDFPMIC - Voltage Regulators - DC DC Switching Regulators
The LTM4645IY#PBF is a high-efficient, high-density synchronous step-down DC/DC µModule (micro module) regulator. It combines a 3A, 40V, 6 x 7mΩ power stage, PWM controller, gate drives, and galvanic isolation in a single package. Its small form factor allows designers to integrate the DC/DC regulator in tight spaces and reduce the size of their designs.
Application Field
The LTM4645IY#PBF is mainly used in industrial and communications systems, providing high efficiency and reliable power conversion, meeting all the requirements of high-current system applications, such as the +12V supply on a computer board, which is used to control high-current FPGA cores, processors, FETs and other power components. It can also be used in servers, storage, networking, and other communication systems applications.
Working Principle
The LTM4645IY#PBF is based on a synchronous step-down regulator design, which is capable of maintaining a regulated output voltage in the face of line and load changes. It features an integrated synchronous PWM controller and a power switch, which operate in a step-down buck configuration that enables it to convert high input voltages into lower output voltages. The output voltage of the step-down regulator is determined by the input voltage, switching frequency, and resistance of the inductor. The PWM controller boosts the duty cycle of the switch to ensure that the output voltage remains constant, regardless of the line and load changes.
The LTM4645IY#PBF also has a 2A load switch, which can be used to enable or disable the output voltage, allowing the system to conserve power when the output is not in use. The device also comes with an integrated local power supply (LDO) and thermal management system, which can provide the necessary power and cooling for the whole module.
Its high level of integration and small size make the LTM4645IY#PBF well-suited for a wide range of applications, including communication systems, industrial systems, medical equipment, and home appliances. The device is capable of providing high power efficiency and reliability, and is suitable for operation in a wide range of temperatures.