LTC3892HUH-2#PBF

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The LTC3892HUH-2#PBF is an integrated, high current, dual output control DC/DC switching controller. It can provide excellent transient response and very low output noise. It contains an internal high side driving range N-channel MOSFET switch, an internal low side switch (LTC3029 adjustable 2A gate driver) and a dual output synchronous voltage-mode controller. This controller is optimized for very low output noise and fast thermal response. Its main application field is wide-range DC/DC converters that require high power. It is also suitable for applications requiring wide dynamic range and fast transient response.

The LTC3892HUH-2#PBF is based on the voltage-mode control architecture. It is designed to regulate two outputs independently, allowing for separate output voltage settings, higher accuracy and better control. This controller employs a high side current sense detection method and an integrated flyback diode to accomplish synchronous rectification. The internal high side MOSFET switch utilizes a fast turn-off circuit that allows for faster switching, better current balance and more accurate output voltage control. The integrated low side MOSFET driver also provides high speed and precision.

The LTC3892HUH-2#PBF features four input voltage ranges that allow for flexibility during board layout and routing. The input voltage range extends from 4.5V to 42V. The controller includes adjustable maximum duty cycle, adjustable under-voltage lockout levels, and adjustable MOSFET soft-start on both channels. The output side has two adjustable voltage limits that provide safety protection and protect against over-load. This provides the capability to adjust current limit, as well as set a safe level at which the external MOSFETs turn off. The integrated frequency compensation allows for fast loop settling, reducing the number of external components. A Serial Peripheral Interface (SPI) allows for reading device status information and adjusting parameters.

The LTC3892HUH-2#PBF also has an integrated thermal loop that can control the external MOSFETs temperature under all switching conditions. This provides efficient and reliable performance for very high current applications. The integrated antifuse shutdown circuit prevents any inrush current from being applied to the output in the event of a short circuit or any over voltage conditions. The device is available in 16-lead, exposed thermal pad and thermally enhanced Pb-free packages.

In summary, the LTC3892HUH-2#PBF is an integrated, high current dual output control DC/DC switching controller that features an efficient and reliable thermal loop, adjustable voltag and current limits, and SPI interface. The device is suited for wide-range DC/DC converters requiring high current and fast transient response. Its low output noise and wide dynamic range make it ideal for mission critical applications.

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