1 Features

1• Input Voltage Range (PVIN): 1.5 V to 16 V

• Input Bias Voltage (VDD) Range: 4.5 V to 22 V

• Output Voltage Range: 0.6 V to 5.5 V

• Integrated, 2.9-mΩ and 1.2-mΩ Power MOSFETs

With 40-A Continuous Output Current

• Voltage Reference 0.6 V to 1.2 V in 50-mV Steps

Using VSEL Pin

• ±0.5%, 0.9-VREF Tolerance Range: –40°C to

+125°C Junction Temperature

• True Differential Remote Sense Amplifier

• D-CAP3™ Control Loop

• Adaptive On-Time Control with 8 PMBusTM

Frequency: 315 kHz, 425 kHz, 550 kHz, 650 kHz,

825 kHz, 900 kHz, 1.025 MHz, 1.125 MHz

• 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

• 1-MHz PMBus with PEC and SMB_ALRT#

• Create a Custom Design Using the TPS549D22

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 TPS549D22 device is a compact single buck

converter with adaptive on-time, D-CAP3 mode

control. It 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, TI

integrated FETs with a high-side on-resistance of

2.9 mΩ and a low-side on-resistance of 1.2 mΩ. The

device also features accurate 0.5%, 0.9-V 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 TPS549D22 device is available in 7-mm × 5-mm,

40-pin, LQFN-CLIP (RVF) package (RoHs exempt).