Dual Phase Synchronous Boost Controller with PMBus Interface

The LTC®7841 is a high performance dual phase single output synchronous boost

converter controller that drives two N-channel power MOSFET stages

out-of-phase. Multiphase operation reduces input and output capacitor

requirements and allows the use of smaller inductors than the single-phase

equivalent. Synchronous rectification increases efficiency, reduces power loss

and eases thermal requirements, enabling high power boost applications. The

output voltage can be adjusted up to 60V with 0.2% resolution via a

PMBus-compliant serial interface. The serial interface can also be used to

read back fault status, input/output current, input/output voltage and

temperature. System configuration and monitoring is supported by the

LTpowerPlay® development system.

Applications

* Automotive Systems, Medical, Industrial

* Wide VIN Range: 4.5V to 60V

* 1% Total Output Voltage Accuracy Over Temperature at VIN = 12V

* PMBus Compliant Serial Interface:

* Programmable VOUT: Up to 60V with 0.2% Resolution

* Read Back of Average and Peak Temperature, Current, and Voltage (25Hz Refresh Rate)

* Fault Status

* Phase-Lockable Frequency: 75kHz to 850kHz