LTC7841 Datasheet | Analog Devices

FEATURES n Wide VIN Range: 4.5V to 60V n 1% Total Output Voltage Accuracy Over Temperature at VIN = 12V n PMBus pliant Serial Interface: n Programmable VOUT: Up to 60V with 0.2% Resolution n Read Back of Average and Peak Temperature, Current, and Voltage (25Hz Refresh Rate) n Fault Status n Phase-Lockable Frequency: 75k Hz to 850k Hz n Less than 1ms Power-Up Time n Power Good Output Voltage Monitor n Internal LDO Powers Gate Driver from VBIAS or EXTVCC n Low Shutdown Current: IQ < 10µA n Clock Out for 4-Phase Operation (40A Output Current) n Available in a Thermally-Enhanced 5mm x 6mm QFN n AEC-Q100 Qualification In Progress APPLICATIONS n Automotive Systems, Medical, Industrial DESCRIPTION The LTC®7841 is a high performance Poly 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-pliant 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 LTpower Play® development system. Poly Phase operation allows the LTC7841 to be configured for 2-, 3-, 4-, 6-, and 12-phase operation. All registered trademarks and trademarks are the property of their respective owners. Protected by U. S. Patents, including 5408150, 5481178, 5705919, 5929620, 6144194, 6177787, 6580258. TYPICAL APPLICATION VIN 4.5V TO 60V 47µF SENSE1+ SENSE1- BG1 VBIAS BOOST1 SW1 LTC7841 TG1 INTVCC PMBUS 0.1µF 470p F 15n F ALERT SDA SCL SS SENSE2+ SENSE2- BG2 CSLEW BOOST2 FREQ ASEL PLLIN/MODE ITH SGND PGND SW2 TG2 VOUT VFB 8.66k 100p...