TPS544B20 Datasheet, PDF (2/75 Pages) Texas Instruments – 4.5-V to 18-V, 20-A, and 30-A SWIFT Synchronous Buck Converters with PMBus

TPS544B20, TPS544C20
SLUSB69B – MAY 2014 – REVISED JULY 2016
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Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Device Comparison Table..................................... 4
6 Pin Configuration and Functions ......................... 4
7 Specifications......................................................... 6
7.1 Absolute Maximum Ratings ...................................... 6
7.2 ESD Ratings.............................................................. 6
7.3 Recommended Operating Conditions....................... 6
7.4 Thermal Information .................................................. 7
7.5 Electrical Characteristics........................................... 8
7.6 Switching Characteristics ........................................ 11
7.7 Typical Characteristics ............................................ 12
8 Detailed Description ............................................ 16
8.1 Overview ................................................................. 16
8.2 Functional Block Diagram ....................................... 16
8.3 Feature Description................................................. 17
8.4 Device Functional Modes........................................ 27
8.5 Programming........................................................... 28
8.6 Register Maps ......................................................... 30
9 Applications and Implementation ...................... 52
9.1 Application Information............................................ 52
9.2 Typical Application .................................................. 52
10 Power Supply Recommendations ..................... 61
11 Layout................................................................... 62
11.1 Layout Guidelines ................................................. 62
11.2 Layout Example .................................................... 63
12 Device and Documentation Support ................. 65
12.1 Device Support...................................................... 65
12.2 Related Links ........................................................ 66
12.3 Trademarks ........................................................... 66
12.4 Receiving Notification of Documentation Updates 67
12.5 Community Resources.......................................... 67
12.6 Electrostatic Discharge Caution ............................ 67
12.7 Glossary ................................................................ 67
13 Mechanical, Packaging, and Orderable
Information ........................................................... 67
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision A (February 2016) to Revision B
Page
• Changed From: PGND to GND in the Pin Functions table Description for pins BP6 and BPEXT. ....................................... 4
• Changed Pin Functions table Description for VDD pin To: "Bypass with a 0.1-µF to 1.0-µF capacitor to GND
(thermal pad or GND pins) or through a dedicated connection to AGNDSNS." ................................................................... 5
• Changed From: "PGND" To: "GND" in Linear Regulators BP3 and BP6 and External Bypass (BPEXT) Section text. ..... 20
• Changed instances From: "PGND" To: "GND" in the Device Functional Modes ................................................................. 27
• Changed From: " a value of 4.7 μF" To: " a value of 0.1 μF to 1.0 μF" in the Input Capacitor Selection ............................ 55
• Changed text string From: "...one 4.7-μF, 25-V ceramic capacitor..." To: "...one 1.0-μF, 25-V ceramic capacitor..." in
the Input Capacitor Selection description. ............................................................................................................................ 56
• Changed From: "PGND" To: "GND" in the BP6, BP3 and BPEXT section ......................................................................... 56
• Added text to Layout Guidelines section for emphasis on grounding schemes. ................................................................. 62
• Changed PCB Layout Recommendation figure. ................................................................................................................. 63
• Added Receiving Notification of Documentation Updates section. ...................................................................................... 67
Changes from Original (May 2014) to Revision A
Page
• Deleted package suffix and reel quantities from Device Comparison Table ......................................................................... 4
• Changed "Handling" Ratings table to "ESD" Ratings and moved T_stg spec to the Absolute Maximum Ratings table........... 6
• Added sentence in Switching Frequency description........................................................................................................... 20
• Changed "Hiccup" to "Shutdown and latch-off" as the Default Behavior for CMD Command; and, changed Default
Register Value from 3Fh to 07h in Table 5, CMD Code 47h .............................................................................................. 29
• Changed "address" to "frequency" in the PMBus Command Description for CMD Code 80h in Table 5. .......................... 29
• Changed Default Value for Bit Position 5, 4, and 3 from 1 1 1 to 0 0 0 respectively in the
IOUT_OC_FAULT_RESPONSE (47h) table. ...................................................................................................................... 37
• Changed "IVADDR" to "IVFREQ" for Function at Bit Position 4 of the STATUS_MFR_SPECIFIC (80h); and also in
the accompanying description. ............................................................................................................................................ 44
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