Analog Devices LTC7841

Description

The LTCR7841 is a high performance PolyPhaseR 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 LTpowerPlayR development system. PolyPhase operation allows the LTC7841 to be configured for 2-, 3-, 4-, 6-, and 12-phase operation.

Features

• 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
• Less than 1ms Power-Up Time
• Power Good Output Voltage Monitor
• Internal LDO Powers Gate Driver from VBIAS or EXTVCC
• Low Shutdown Current: IQ < 10μA
• Clock Out for 4-Phase Operation (40A Output Current)
• Available in a Thermally-Enhanced 5mm x 6mm QFN

Typical applications

• Automotive Systems,
• Industrial
• Medical

More information

• Datasheet
• IC product information