Texas Instruments TPS53819A, User Manual

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User’s Guide
TPS53819A Buck Controller Evaluation Module User's
Guide
ABSTRACT
The TPS53819AEVM-123 evaluation module (EVM) is designed to evaluate the TPS53819A. The TPS53819A is
a small-size single-buck controller with adaptive on-time D-CAP2 mode control. It provides a fixed 1.2-V output
at up to 25 A from a nominal 12-V input bus. This controller is an analog PWM controller allowing programming
and monitoring via the PMBus interface. The TPS53819AEVM-123 also uses a 5 mm × 6 mm TI power block
MOSFET (CSD87350Q5D) for high power density and superior thermal performance.
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Table of Contents
1 Description .............................................................................................................................................................................. 2
1.1 Typical Applications............................................................................................................................................................ 2
1.2 Features............................................................................................................................................................................. 2
2 Electrical Performance Specifications ................................................................................................................................. 3
3 Schematic ................................................................................................................................................................................ 4
4 Test Setup ................................................................................................................................................................................ 5
4.1 Test and Configuration Software........................................................................................................................................ 5
4.2 Test Equipment.................................................................................................................................................................. 5
4.3 Recommended Test Setup................................................................................................................................................. 6
4.4 List of Test Points............................................................................................................................................................... 7
4.5 Jumper Configuration: Enable Selection............................................................................................................................ 8
5 EVM Configuration Using the Fusion GUI ............................................................................................................................ 8
5.1 Configuration Procedure.................................................................................................................................................... 8
5.2 Default Fusion GUI Screenshots and Description.............................................................................................................. 8
6 Test Procedure ...................................................................................................................................................................... 12
6.1 Line and Load Regulation and Efficiency Measurement Procedure................................................................................ 12
6.2 Control Loop Gain and Phase Measurement Procedure................................................................................................. 12
6.3 Equipment Shutdown....................................................................................................................................................... 12
7 Performance Data and Typical Characteristic Curves ...................................................................................................... 13
7.1 Efficiency.......................................................................................................................................................................... 13
7.2 Load Regulation............................................................................................................................................................... 13
7.3 Line Regulation................................................................................................................................................................ 14
7.4 f
SW
Versus Load............................................................................................................................................................... 14
7.5 Bode Plot.......................................................................................................................................................................... 15
7.6 Transient Response......................................................................................................................................................... 15
7.7 Output Ripple................................................................................................................................................................... 16
7.8 Switching Node................................................................................................................................................................ 17
7.9 Turn-On Waveform........................................................................................................................................................... 18
7.10 Turn-Off Waveform......................................................................................................................................................... 19
7.11 Pre-bias Turn-On Waveform........................................................................................................................................... 20
7.12 Thermal Images............................................................................................................................................................. 20
8 EVM Assembly Drawing and PCB layout ........................................................................................................................... 22
9 Bill of Materials ..................................................................................................................................................................... 26
10 Revision History ................................................................................................................................................................. 26
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SLVU719B – MAY 2012 – REVISED NOVEMBER 2021
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