Texas Instruments TPS544x25 SWIFT™ Synchronous Buck Converters are PMBus 1.2 Compliant, non-isolated DC-DC converters with integrated FETs. They are capable of high-frequency operation and 20A or 30A current output. 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 through VOUT_COMMAND, flexible converter configuration. It also enables key parameters monitoring which includes output voltage, current and an optional external temperature. Response to fault conditions can be set to either restart, latch-off or ignore depending on system requirements.
特點
20A and 30A PMBus 1.2 compliant converters
4.5V to 18V input voltage range
0.5V to 5.5V output voltage range
5mm × 7mm LQFN package
Single thermal pad
Integrated 5.5mΩ and 2.0mΩ stacked NexFET power stage
500mV to 1500mV reference for Adaptive Voltage Scaling (AVS) 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
External temperature monitoring with 2N3904 transistor
Programmable via the PMBus interface
VOUT_COMMAND and AVS VOUT transition rate
Overcurrent protection with thermal compensation
UVLO, soft-start and soft-stop
PGOOD, OV, UV, OT levels
Fault responses
Turn-on and turn-off delays
Thermal shutdown
200kHz to 1MHz pin strapping for switching frequency
Frequency synchronization to an external clock
Footprint compatible 20A, 30A converters
應用
Test and instrumentation
Ethernet switches, optical switches, routers, base stations
