TPS549B22 Datasheet, PDF (1/68 Pages) Texas Instruments – 1.5-V to 18-V VIN, 4.5-V to 22-V VDD, 25-A SWIFT Synchronous Step-Down Converter With Full Differential Sense and PMBus

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TPS549B22
SNVSAU8 – JUNE 2017
TPS549B22 1.5-V to 18-V V_IN, 4.5-V to 22-V V_DD, 25-A SWIFT™
Synchronous Step-Down Converter With Full Differential Sense and PMBus™
1 Features
•1 Input Voltage (PV_IN): 1.5 V to 18 V
• Input Bias Voltage (V_DD) Range: 4.5 V to 22 V
• Output Voltage Range: 0.6 V to 5.5 V
• Integrated, 4.1-mΩ and 1.9-mΩ Power MOSFETs
With 25-A Continuous Output Current
• Voltage Reference 0.6 V to 1.2 V in 50-mV Steps
Using VSEL Pin
• ±0.5%, 0.9-V_REF Tolerance Range: –40°C to
+125°C Junction Temperature
• True Differential Remote Sense Amplifier
• D-CAP3™ Control Loop
• Adaptive On-Time Control with 8 PMBus^TM
Frequencies: 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 R_ILIM and OC Clamp
• Choice of Hiccup or Latch-Off OVP or UVP
• V_DD 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 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 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 and TI
integrated FETs with a high-side on-resistance of
4.1 mΩ and a low-side on-resistance of 1.9 mΩ. The
device also features an 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 TPS549B22 device is available in 7 mm × 5 mm,
40-pin, LQFN-CLIP (RVF) package (RoHs exempt).
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS549B22
LQFN-CLIP (40)
7.00 mm × 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Application
PGOOD
ALERT#
DATA
CLOCK
ENABLE
VSEL
MODE
PGOOD
ILIM
RESV_TRK
RSN
RSP
VOSNS
TPS549B22
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PVIN
Load
+±
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.