LTC3871ELXE#PBF

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The LTC3871ELXE#PBF is a high efficiency, high power, monolithic synchronous buck switching regulator controller with high current capability. It combines the advanced features of a digital PWM controller, low gate drive requirements and low RDSON synchronous FET gate drivers. The LTC3871ELXE#PBF is a DC-to-DC switching controller with features specifically tailored to synchronous buck applications through the use of an external clock source. It is specifically designed to drive up to five phases of high current low resistance MOSFETs, allowing high current power conversion solutions to be developed with fewer components. The high precision integrated compensation network of the LTC3871ELXE#PBF minimizes board space while the programmable cycle-by-cycle current-limit reduces component count and design complexity.

The LTC3871ELXE#PBF’s two main functions are power conversion and management, and linear voltage regulation. The device integrates a peak current mode pulse width modulation (PWM) controller and an adjustable linear regulator controller with an adjustable slow start feature. The PWM controller can be configured to generate either forced constant-frequency switching, or a constant off-time (COT) control mode. Optional built-in slope compensation is available for use in forced constant-frequency mode for improved EMI performance. The POUT (output) voltage of the supply is maintained at a regulated level via the feedback control loop for both current limit and line regulation.

The LTC3871ELXE#PBF can be used in a wide range of applications including telecom and industrial power supplies, computing and networking systems, laptop power management, and power conversion applications. It is ideal for providing a flexible and efficient solution to meet the needs of high performance, high power designs. It operates over a wide input voltage range of 3.3 V to 42 V, and can deliver up to 12 A of output current at voltages up to 24 V. The device also has a 400 kHz high side gate driver. The low RDSON gate drive and high drive capability of the part enable it to be used in power conversion solutions that require high current delivery.

The LTC3871ELXE#PBF is also featuring soft startup, over-current protection, and over temperature protection for increased system safety. It has a programmable oscillator frequency as well as adaptive transconductance compensation for reduced noise and improved accuracy. An additional advantage of the LTC3871ELXE#PBF is that it can be programmed without external components, so a prototype design can be implemented relatively quickly and have the flexibility to be adjusted for fine tune changes. The LTC3871ELXE#PBF is an ideal choice for applications requiring high current and efficient solution for power conversion.

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