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).