The TPS546C23RVFT is a 4.5V to 18V, 35A stackable synchronous buck converter with PMBus in 40 pin LQFN-CLIP package. Device is PMBus 1.3 compliant, non-isolated DC-DC converter with integrated FETs, capable of high frequency operation and 35A current output. Two TPS546C23 devices can be paralleled together to provide up to 70A load. Current sensing is realized by sampling a small portion of the power stage current and independent on the device temperature. High frequency, low loss switching, provided by an integrated NexFET power stage and optimized drivers, allows for very high density power solutions. The PMBus interface enables the AVS functions through VOUT_COMMAND, flexible converter configuration, as well as key parameters monitoring including output voltage, current and internal die temperature.
● Input voltage range from 4.5V to 18V
● Output voltage range from 0.35V to 5.5V
● Single thermal pad, thermal shutdown
● Integrated 3.2mohm and 1.4mohm stacked NexFET power stage
● 350mV to 1650mV reference for adaptive voltage scaling (AVS) function and margining through PMBus
● 0.5% reference accuracy at 600mV and above, lossless low-side MOSFET current sensing
● Voltage mode control with input feed-forward, differential remote sensing
● Monotonic start-up into pre-biased output, output voltage and output current reporting
● Internal Die temperature monitoring, programmable via the PMBus interface
● Pin strapping for switching frequency is 200KHz to 1MHz
●Device have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
