Texas Instruments TPS544x25 SWIFT™ 同步降压转换器

德州仪器 TPS544x25 SWIFT™ 同步降压转换器是兼容 PMBus 1.2 的非隔离式直流-直流转换器，带有集成的 FET。它们支持高频运行并传送 20A 或 30A 的电流输出。由集成 NexFET 功率级和经优化驱动器提供的高频、低损耗开关可实现极高密度电源解决方案。PMBus 接口通过 VOUT_COMMAND，灵活的转换器配置实现 AVS。还监视关键参数，其中包括输出电压、电流和一个可选外部温度。根据系统要求，对故障情况的响应可被设定为重新启动、锁断或忽略。

特性

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