TPS544B25 Converters Datasheet

TPS544B25 Datasheet PDF, Equivalent


Part Number

TPS544B25

Description

Synchronous Buck Converters

Manufacture

etcTI

Total Page 30 Pages
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TPS544B25
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TPS544C25, TPS544B25
SLUSC81 – MAY 2015
TPS544x25 4.5-V to 18-V, 20-A and 30-A SWIFT™
Synchronous Buck Converters with PMBus™ and Frequency Synchronization
1 Features
1 PMBus 1.2 Compliant Converters: 20 A and 30 A
• Input Voltage Range: 4.5 V to 18 V
• Output Voltage Range: 0.5 V to 5.5 V
• 5 mm × 7 mm LQFN Package
• Single Thermal Pad
• Integrated 5.5-mΩ and 2.0-mΩ Stacked
NexFET™ Power Stage
• 500-mV to 1500-mV Reference for Adapative
Voltage Scaling (AVS) and Margining through
PMBus
• 0.5% Reference Accuracy at 600 mV and Above
• Lossless Low-Side MOSFET Current Sensing
• Voltage Mode Control with Input Feed-Forward
• Differential Remote Sensing
• Monotonic Start-Up into Pre-Biased Output
• Output Voltage and Output Current Reporting
• External Temperature Monitoring with 2N3904
Transistor
• Programmable via the PMBus interface
– VOUT_COMMAND and AVS VOUT Transition
Rate
– Overcurrent Protection with Thermal
Compensation
– UVLO, Soft-Start and Soft-Stop
– PGOOD, OV, UV, OT Levels
– Fault Responses
– Turn-On and Turn-Off Delays
• Thermal Shutdown
• Pin Strapping for Switching Frequency: 200 kHz to
1 MHz
• Frequency Synchronization to an External Clock
• Footprint Compatible 20-A, 30-A Converters
2 Applications
• Test and Instrumentation
• Ethernet Switches, Optical Switches, Routers,
Base Stations
• Servers
• Enterprise Storage SSD
• High-Density Power Solutions
3 Description
The TPS544x25 devices are PMBus 1.2 Compliant,
non-isolated DC-DC converters with integrated FETs,
capable of high-frequency operation and 20-A or 30-A
current output from a 5 mm × 7 mm package. High-
frequency, low-loss switching, provided by an
integrated NexFET™ power stage and optimized
drivers, allows for very high-density power solutions.
The PMBus interface enables the AVS through
VOUT_COMMAND, flexible converter configuration,
as well as key parameters monitoring including output
voltage, current and an optional external temperature.
Response to fault conditions can be set to either
restart, latch-off or ignore depending on system
requirements.
Device Information
DEVICE NAME
PACKAGE
BODY SIZE
TPS544B25RVFT
LQFN (40)
5.00 mm × 7.00 mm
TPS544C25RVFT
LQFN (40)
5.00 mm × 7.00 mm
.
.
Efficiency
100
95
90
85
80
75
70
65
60
048
VIN = 12 V
fSW = 500 kHz
12 16 20
Load Current (A)
No Snubber
RDCR = 0.3mŸ
VOUT = 0.5
VOUT = 1.0
VOUT = 1.5
VOUT = 2.5
VOUT = 3.3
24 28 32
L = 470 nH
RBOOT = 0 Ÿ
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.

TPS544B25
TPS544C25, TPS544B25
SLUSC81 – MAY 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Device Comparison Table..................................... 3
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 5
7.1 Absolute Maximum Ratings ...................................... 5
7.2 ESD Ratings ............................................................ 5
7.3 Recommended Operating Conditions....................... 5
7.4 Thermal Information .................................................. 6
7.5 Electrical Characteristics........................................... 7
7.6 Typical Characteristics ............................................ 12
8 Detailed Description ............................................ 18
8.1 Overview ................................................................. 18
8.2 Functional Block Diagram ....................................... 18
8.3 Feature Description................................................. 19
8.4 Device Functional Modes........................................ 36
8.5 Supported PMBus Commands ............................... 36
8.6 Register Maps ......................................................... 39
9 Applications and Implementation ...................... 77
9.1 Application Information............................................ 77
9.2 Typical Applications ................................................ 77
10 Power Supply Recommendations ..................... 86
11 Layout................................................................... 87
11.1 Layout Guidelines ................................................. 87
11.2 Layout Example .................................................... 88
12 Device and Documentation Support ................. 90
12.1 Device Support .................................................... 90
12.2 Related Links ........................................................ 91
12.3 Community Resources.......................................... 91
12.4 Trademarks ........................................................... 92
12.5 Electrostatic Discharge Caution ............................ 92
12.6 Glossary ................................................................ 92
13 Mechanical, Packaging, and Orderable
Information ........................................................... 92
4 Revision History
DATE
May 2015
REVISION
*
NOTES
Initial release.
2 Submit Documentation Feedback
Copyright © 2015, Texas Instruments Incorporated
Product Folder Links: TPS544C25 TPS544B25


Features Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity Reference Design TPS544C25, TP S544B25 SLUSC81 – MAY 2015 TPS544x25 4.5-V to 18-V, 20-A and 30-A SWIFT™ S ynchronous Buck Converters with PMBus and Frequency Synchronization 1 Feat ures •1 PMBus 1.2 Compliant Converter s: 20 A and 30 A • Input Voltage Rang e: 4.5 V to 18 V • Output Voltage Ran ge: 0.5 V to 5.5 V • 5 mm × 7 mm LQF N Package • Single Thermal Pad • In tegrated 5.5-mΩ and 2.0-mΩ Stacked Ne xFET™ Power Stage • 500-mV to 1500- mV Reference for Adapative Voltage Scal ing (AVS) and Margining through PMBus 0.5% Reference Accuracy at 600 mV an d Above • Lossless Low-Side MOSFET Cu rrent Sensing • Voltage Mode Control with Input Feed-Forward • Differentia l Remote Sensing • Monotonic Start-Up into Pre-Biased Output • Output Volt age and Output Current Reporting • Ex ternal Temperature Monitoring with 2N39 04 Transistor • Programmable via the PMBus interface – VOUT_COMMAND and AVS VOUT Transition Rate – Ove.
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