LTC3871ELXE#PBF

LTC3871 is a high performance bidirectional buck or boost switching regulator controller that operates in either buck or boost mode on demand. It regulates in buck mode from VHIGH-to-VLOW and boost mode from VLOW-to-VHIGH depending on a control signal, making it ideal for 48V/12V automotive dual battery systems. It allows both batteries to supply energy to the load simultaneously by converting energy from one battery to the other. Its proprietary constant-frequency current mode architecture enhances the signal-to-noise ratio enabling low-noise operation and provides excellent current matching between phases. Additional features include discontinuous or continuous mode of operation, OV/UV monitors, independent loop compensation for buck and boost operation, accurate output current monitoring and overcurrent protection. It is used in applications such as automotive 48V/12V dual battery systems, backup power systems etc.

• Unique architecture allows dynamic regulation of input voltage, output voltage or current
• VHIGH voltages upto 100V, VLOW voltages upto 30V
• Synchronous rectification upto 97% efficiency, selectable CCM/DCM modes
• ADI-proprietary advanced current mode control
• ±1% voltage regulation accuracy over temperature
• Selectable buck and boost current sense limits
• Programmable DRVCC/EXTVCC optimizes efficiency, multiphase/multi-ICs operation upto 12 phases
• Programmable VHIGH UV and OV thresholds, programmable VLOW OV threshold
• Operating temperature is -40°C to 125°C
• Package style is 48-lead plastic LQFP

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party