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TPS546D24A Datasheet Preview

TPS546D24A Datasheet

Buck Converter

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TPS546D24A
SLUSDN0 – DECEMBER 2019
TPS546D24A 2.95-V to 16-V, 40-A, up to 4× Stackable, PMBus® Buck Converter
1 Features
1 Split rail support: 2.95-V to 16-V PVIN;
2.95-V to 18-V AVIN (4-VIN VDD5 for switching)
• Integrated 4.5-m/0.9-mMOSFETs
• Average current mode control with selectable
internal compensation
• 2×, 3x, 4× stackable with current sharing up to
160 A, supporting a single address per output
• Selectable 0.6-V to 5.5-V output via pin strap or
0.25-V to 6.0-V using PMBus VOUT_COMMAND
• Extensive PMBus command set with telemetry for
VOUT, IOUT and internal die temperature
• Differential remote sensing with internal FB divider
for < 1% VOUT error –40°C to +150°C TJ
• AVS and margining capabilities through PMBus
• MSEL pins pin programming PMBus defaults
• 12 Selectable switching frequencies from 225 kHz
to 1.5 MHz (8 pin-strap options)
• Frequency sync in/sync out
• Supports prebiased output
• Supports strongly coupled inductor
• 7 mm × 5 mm × 1.5 mm, 40-pin QFN,
Pitch = 0.5 mm
• Create a Custom Design Using the TPS546D24A
With WEBENCH® Power Designer
2 Applications
• Data center switches, rack servers
• Active antenna system, remote radio and
baseband unit
• Automated test equipment, CT, PET, and MRI
• ASIC, SoC, FPGA, DSP core, and I/O voltage
3 Description
The TPS546D24A is a highly integrated, non-isolated
DC/DC converter capable of high frequency operation
and 40-A current output from a 7-mm × 5-mm
package. Two, three, and four TPS546D24A devices
can be interconnected to provide up to 160 A on a
single output. The device has an option to overdrive
the internal 5-V LDO with an external 5-V supply via
the VDD5 pin to improve efficiency and reduce power
dissipation of the converter.
The TPS546D24A uses a proprietary fixed-frequency
current-mode control with input feedforward and
selectable internal compensation components for
minimal size and stability over a wide range of output
capacitances.
The PMBus interface with 1-MHz clock support gives
a convenient, standardized digital interface for
converter configuration as well as monitoring of key
parameters including output voltage, output current,
and internal die temperature. Response to fault
conditions can be set to restart, latch off, or ignore,
depending on system requirements. Back-channel
communication between stacked devices enables all
TPS546D24A converters powering a single output rail
to share a single address to simplify system
software/firmware design. Key parameters including
output voltage, switching frequency, soft-start time,
and overcurrent fault limits can also be configured
through BOM selection without PMBus
communication to support program free power-up.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS546D24A
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
VIN
BP1V5
DRTN
MSEL1
MSEL2
ADRSEL
VSEL
AGND
VOSNS
GOSNS/SLAVE
BOOT
TPS546D24A
SW
VDD5
PGND
VOUT
To Loop Slaves
To PMBus
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.




etcTI

TPS546D24A Datasheet Preview

TPS546D24A Datasheet

Buck Converter

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TPS546D24A
SLUSDN0 – DECEMBER 2019
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 5
6.1 Absolute Maximum Ratings ...................................... 5
6.2 ESD Ratings.............................................................. 5
6.3 Recommended Operating Conditions....................... 5
6.4 Thermal Information .................................................. 6
6.5 Electrical Characteristics........................................... 6
6.6 Typical Characteristics ............................................ 14
7 Detailed Description ............................................ 18
7.1 Overview ................................................................. 18
7.2 Functional Block Diagram ....................................... 18
7.3 Feature Description................................................. 19
7.4 Device Functional Modes........................................ 33
7.5 Programming........................................................... 34
7.6 Register Maps ......................................................... 44
8 Application and Implementation ...................... 146
8.1 Application Information.......................................... 146
8.2 Typical Application ................................................ 146
8.3 Two-Phase Application ......................................... 156
8.4 Four-Phase Application......................................... 162
9 Power Supply Recommendations.................... 163
10 Layout................................................................. 163
10.1 Layout Guidelines ............................................... 163
10.2 Layout Example .................................................. 164
10.3 Mounting and Thermal Profile Recommendation 164
11 Device and Documentation Support ............... 166
11.1 Device Support.................................................... 166
11.2 Receiving Notification of Documentation
Updates.................................................................. 166
11.3 Community Resources........................................ 166
11.4 Trademarks ......................................................... 166
11.5 Electrostatic Discharge Caution .......................... 167
11.6 Glossary .............................................................. 167
12 Mechanical, Packaging, and Orderable
Information ......................................................... 167
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
DATE
December 2019
REVISION
*
NOTES
Initial release
2 Submit Documentation Feedback
Copyright © 2019, Texas Instruments Incorporated


Part Number TPS546D24A
Description Buck Converter
Maker etcTI
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