1 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, 4.1mΩ and 1.9mΩ power MOSFETs
with 25A continuous output current
• Voltage reference 0.6V to 1.2V in 50mV steps
using VSEL pin
• ±0.5%, 0.9VREF tolerance range: –40°C to +125°C
junction temperature
• True differential remote sense amplifier
• D-CAP3™ control mode
• Adaptive on-time control with 8 PMBus®
frequencies: 315kHz, 425kHz, 550kHz, 650kHz,
825kHz, 900kHz, 1.025MHz, 1.125MHz
• Temperature compensated and programmable
current limit with RILIM and OC clamp
• Choice of hiccup or latch-off OVP or UVP
• VDD UVLO External Adjustment by Precision EN
• Prebias start-up support
• Eco-mode and FCCM selectable
• Full suite of fault protection and PGOOD
• Standard VOUT_COMMAND and VOUT_MARGIN
(HIGH and LOW)
• Pin-strapping and on-the-fly programming
• Fault reporting and warning
• NVM backup for selected commands
• 1MHz PMBus with PEC and SMB_ALRT#
• Create a custom design using the TPS549B22
with the WEBENCH® Power Designer

2 Applications
• Enterprise storage, SSD, NAS
• Wireless and wired communication infrastructure
• Industrial PCs, automation, ATE, PLC, video
surveillance
• Enterprise server, switches, routers
• ASIC, SoC, FPGA, DSP Core and I/O Rails

3 Description
The TPS549B22 device is a compact single buck
converter with adaptive on-time, D-CAP3 control
mode. The device is designed for high accuracy,
high efficiency, fast transient response, ease-of-use,
low external component count and space-conscious
power systems.
This device features full differential sense and TI
integrated FETs with a high-side on-resistance of
4.1mΩ and a low-side on-resistance of 1.9mΩ.
The device also features an accurate 0.5%, 0.9V
reference with an ambient temperature range
between –40°C and +125°C. Competitive features
include: very low external component count, accurate
load regulation and line regulation, auto-skip or FCCM
mode operation, and internal soft-start control.
The TPS549B22 device is available in 7mm × 5mm,
40-pin, LQFN-CLIP (RVF) package (RoHs exempt).