TPS549B22RVFT

The TPS549B22 is a compact single-channel buck converter with adaptive on-time D-CAP3 mode control. It is designed for power supply systems requiring high accuracy, high efficiency, fast transient response, ease of use, minimal external components, and space-constrained designs. The device features fully differential sensing and integrated FETs, with a high-side on-resistance of 4.1 mΩ and a low-side on-resistance of 1.9 mΩ. It also offers 0.5% accuracy and a 0.9V reference voltage, with an ambient temperature range of -40°C to +125°C. Key competitive advantages include: ultra-low external component count, precise load and line regulation, automatic frequency hopping or FCCM operating modes, and internal soft-start control.

Applications

• Enterprise storage, SSD, NAS
• Wireless and wired communication infrastructure
• Industrial PC, automation, ATE, PLC, video surveillance
• Enterprise servers, switches, routers
• ASIC, SoC, FPGA, DSP core and I/O power rails

Key features

• Input voltage (PVIN): 1.5V to 18V
• Input bias voltage (VDD) range: 4.5V to 22V
• Output voltage range: 0.6V to 5.5V
• Integrated 4.1 mΩ and 1.9 mΩ power MOSFETs, 25A continuous output current
• Reference voltage range: 0.6V to 1.2V (50mV steps) via VSEL pin
• ±0.5%, 0.9VREF tolerance: -40°C to +125°C junction temperature
• True differential remote sense amplifier
• D-CAP3™ control loop
• Adaptive on-time control with 8 PMBus™ frequencies: 315kHz, 425kHz, 550kHz, 650kHz, 825kHz, 900kHz, 1.025MHz, and 1.125MHz
• Temperature-compensated and programmable current limit with RILM and OC clamp
• Selectable hiccup or latched OVP or UVP
• VDD UVLO external adjustment via precision EN
• Pre-bias startup support
• Eco-mode™ and FCCM selectable
• Comprehensive fault protection and PGOOD
• Standard VOUT_COMMAND and VOUT_MARGIN (high and low)
• Pin-strap and real-time programming
• Fault reporting and warning
• NVM backup for selected commands
• 1MHz PMBus with PEC and SMB_ALRT# support