TPS56C20EVM-614

www.ti.com Table of Contents User’s Guide TPS56C20 Buck Converter Evaluation Module User's Guide ABSTRACT This user's guide describes the characteristics, operation, and use of the TPS56C20EVM-614 evaluation module (EVM). The document includes performance specifications, test setup and results, the printed-circuit board (PCB) layout, a schematic, and a bill of materials (BOM). Table of Contents 1 Introduction.............................................................................................................................................................................3 2 Performance Specification Summary................................................................................................................................... 4 3 Modifications...........................................................................................................................................................................5 3.1 Output Voltage Set Point....................................................................................................................................................5 3.2 Output Voltage Set Point Using I2C Interface.................................................................................................................... 5 3.3 Output Filter and Closed Loop Response.......................................................................................................................... 8 4 Test Setup and Results.......................................................................................................................................................... 9 4.1 Input/Output Connections.................................................................................................................................................. 9 4.2 Start Up Procedure............................................................................................................................................................ 9 4.3 Efficiency..........................................................................................................................................................................10 4.4 Load Regulation............................................................................................................................................................... 11 4.5 Line Regulation.................................................................................................................................................................11 4.6 Load Transient Response................................................................................................................................................ 12 4.7 Output Voltage Ripple...................................................................................................................................................... 12 4.8 Start Up............................................................................................................................................................................ 13 4.9 Shut Down........................................................................................................................................................................14 5 Board Layout.........................................................................................................................................................................15 5.1 Board Layout....................................................................................................................................................................15 6 Schematic, Bill of Materials and Reference....................................................................................................................... 18 6.1 Schematic........................................................................................................................................................................ 18 6.2 Bill of Materials.................................................................................................................................................................19 6.3 Reference.........................................................................................................................................................................19 7 Revision History................................................................................................................................................................... 19 List of Figures Figure 3-1. USB2ANY Connection.............................................................................................................................................. 6 Figure 3-2. TPS56X20 I2C TEST PANEL....................................................................................................................................7 Figure 3-3. EXT Power Settings.................................................................................................................................................. 7 Figure 3-4. ALL VOUTS Control.................................................................................................................................................. 8 Figure 4-1. TPS56C20EVM-614 Efficiency................................................................................................................................10 Figure 4-2. TPS56C20EVM-614 Efficiency (Low Current).........................................................................................................10 Figure 4-3. TPS56C20EVM-614 Load Regulation..................................................................................................................... 11 Figure 4-4. TPS56C20EVM-614 Line Regulation...................................................................................................................... 11 Figure 4-5. TPS56C20EVM-614 Load Transient Response......................................................................................................12 Figure 4-6. TPS56C20EVM-614 Output Voltage Ripple............................................................................................................12 Figure 4-7. TPS56C20EVM-614 Start Up Relative to VIN .........................................................................................................13 Figure 4-8. TPS56C20EVM-614 Start Up Relative to Enable................................................................................................... 13 Figure 4-9. TPS56C20EVM-614 Shut Down Relative to VIN .................................................................................................... 14 Figure 4-10. TPS56C20EVM-614 Shut Down Relative to Enable............................................................................................. 14 Figure 5-1. Top Assembly.......................................................................................................................................................... 15 Figure 5-2. Top Layer.................................................................................................................................................................16 Figure 5-3. Internal Layer 1....................................................................................................................................................... 16 SBAU227A – MARCH 2014 – REVISED JUNE 2021 Submit Document Feedback TPS56C20 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 1 Trademarks www.ti.com Figure 5-4. Internal Layer 2....................................................................................................................................................... 17 Figure 5-5. Bottom Layer........................................................................................................................................................... 17 Figure 6-1. TPS56C20EVM-614 Schematic Diagram............................................................................................................... 18 List of Tables Table 1-1. Input Voltage and Output Current Summary...............................................................................................................3 Table 2-1. TPS56C20EVM-614 and Performance Specifications Summary............................................................................... 4 Table 3-1. Output Voltages.......................................................................................................................................................... 5 Table 4-1. Connection and Test Points........................................................................................................................................ 9 Table 6-1. TPS56C20EVM-614 Bill of Materials........................................................................................................................ 19 Trademarks D-CAP2™ is a trademark of Texas Instruments. Microsoft® and Windows® are registered trademarks of Microsoft Corporation. All trademarks are the property of their respective owners. 2 TPS56C20 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SBAU227A – MARCH 2014 – REVISED JUNE 2021 Submit Document Feedback www.ti.com Introduction 1 Introduction The TPS56C20 is a synchronous DC-DC converter. The TPS56C20 is a buck converter whose output voltage can be adjusted using the feedback resistor divider network or using VID commands from an I2C interface bus. It is a single, adaptive on-time, D-CAP2™ mode converter requiring a very low external component count. The D-CAP2 control circuit is optimized for low-ESR output capacitors such as POSCAP or SP-CAP, or ceramic types. The D-CAP2 control circuit features fast transient response with no external compensation. The reference design internally sets the switching frequency at a nominal 500 kHz. The design integrates the high- and low-side switching MOSFETs and the gate drive circuitry. The low drain-to-source on resistance of the MOSFETs allows the TPS56C20 to achieve high efficiencies and helps keep the junction temperature low at high output currents. The TPS56C20 DC/DC synchronous converter provides up to a 12-A output from an input voltage source of 4.5 V to 17 V. The output voltage range is from 0.6 V to 1.87 V. The rated input voltage and output current range for the evaluation module are given in Table 1-1. The TPS56C20EVM-614 evaluation module is a single, synchronous buck converter providing 1.1 V at 12 A from 4.5-V to 17-V input. Table 1-1. Input Voltage and Output Current Summary EVM Input Voltage Range Output Current Range TPS56C20EVM-614 VIN = 4.5V to 17V 0A to 12A SBAU227A – MARCH 2014 – REVISED JUNE 2021 Submit Document Feedback TPS56C20 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 3 Performance Specification Summary www.ti.com 2 Performance Specification Summary A summary of the TPS56C20EVM-614 performance specifications is provided in Table 2-1. Specifications are given for an input voltage of VIN = 12V and an output voltage of 1.1V, unless otherwise noted. The ambient temperature is 25°C for all measurement, unless otherwise noted. Table 2-1. TPS56C20EVM-614 and Performance Specifications Summary Parameter Test Conditions Input voltage range (VIN) Min Typ Max 4.5 12 17 Output voltage Operating frequency VIN = 12 V, IO = 12 A Output current range 4 VIN = 12 V Output ripple voltage VIN = 12 V, IO = 12 A TPS56C20 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 13.2 V 1.1 V 500 kHz 0 Over current limit Units 12 A 20 A 25 mVPP SBAU227A – MARCH 2014 – REVISED JUNE 2021 Submit Document Feedback www.ti.com Modifications 3 Modifications The design of the TPS56C20EVM-614 provides access to all the four devices of the IC family: TPS56520, TPS56720, TPS56920, and TPS56C20. The module ships with a TPS56C20 IC soldered but the user can replace the TPS56C20 with any of the other three ICs to test their performance. 3.1 Output Voltage Set Point To change the output voltage of the TPS56C20EVM-614, change the value of resistor R7. Calculate the value of R7 for a specific output voltage between 0.6 V to 1.87 V using Equation 1. VOUT = 0.6 × (1 + R7 / R8) (1) Table 3-1 lists the R7 values for common output voltages. For higher output voltages, a feed forward capacitor (C12) may be required to improve phase margin. The evaluation module provides pads to include the component (C12). NOTE: the values given in Table 3-1 are standard values and not the exact value. Table 3-1. Output Voltages Output Voltage (V) R7 (kΩ) R8 (kΩ) C12 (pF) L1 (µH) MIN C6 + C7 (µF) TYP MAX 0.8 7.33 22 1 14.7 22 1.0 1.5 2.2 44 – 100 1.1 18.2 22 1.0 1.5 2.2 44 – 100 1.2 22 22 1.0 1.5 2.2 44 – 100 1.5 33 22 1.0 1.5 2.2 44 – 100 1.8 44.2 22 1.0 1.5 2.2 44 – 100 Optional 3.2 Output Voltage Set Point Using I2C Interface The engineer can change the TPS56C20 output voltage by using an I2C interface which can dynamically scale the output voltage in the range of 0.6 V to 1.87 V. Section 3.2.1, Section 3.2.2, and Section 3.2.3 explain the procedure to download all the software required and how to communicate between the evaluation module and the PC. The design includes an easy-to-use GUI so that the design engineer can test the I2C functionality without much prior experience. The test requires a PC running the Microsoft® Windows® operating system, the TI USB2ANY interface, and USB2ANY_GUI software. The design engineer can purchase the TI USB2ANY interface from the TI website. 3.2.1 PC Preparation Use the following steps to prepare the PC for use: 1. 2. 3. 4. Turn on the PC and boot up the Windows operating system. Copy the provided file “PC-Software.zip” to a directory on the system hard drive. Uncompress the files to that directory. From the directory listing, unzip the USB2ANY_SDK_SETUP program files and run the USB2ANY_SDK_Setup.exe with the default settings. 5. From the directory listing, unzip the TPS56X20 I2C TEST PANEL file and run the SETUP file from the TPS56X20 I2C TEST PANEL Installer. 6. Reboot the PC after installing both pieces of software. 3.2.2 Connect the PC Use the following steps to connect the PC to the TI USB2ANY interface: 1. Connect the provided USB cable between the PC USB port and the TI USB2ANY interface as illustrated in Figure 3-1. 2. Connect the supplied 10 conductor ribbon cable between the TI USB2ANY interface and PWR614 J4 connector. 3. Turn on or enable the input voltage power supply. SBAU227A – MARCH 2014 – REVISED JUNE 2021 Submit Document Feedback TPS56C20 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 5 Modifications www.ti.com Figure 3-1. USB2ANY Connection 3.2.3 Voltage Scaling Procedure Set voltage scaling by using the following steps: 1. Go to Program Files and click on the TPS56X20 I2C TEST PANEL Application. The TPS56X20 I2C TEST PANEL will load as shown in Figure 3-2. 6 TPS56C20 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SBAU227A – MARCH 2014 – REVISED JUNE 2021 Submit Document Feedback www.ti.com Modifications Figure 3-2. TPS56X20 I2C TEST PANEL 2. As a first step before sending a VOUT command, click the write command On the EXT Power Settings block as shown in Figure 3-3. Figure 3-3. EXT Power Settings 3. Go to the VOUTS control block and click on the ALL VOUTS control, illustrated in Figure 3-4. The drop down menu gives an option to select different VOUT. SBAU227A – MARCH 2014 – REVISED JUNE 2021 Submit Document Feedback TPS56C20 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 7 Modifications www.ti.com Figure 3-4. ALL VOUTS Control 4. Select a particular value and click on WRITE VOUT switch. Observe that the Voltage at TP6 relative to TP7 is changed to the programmed VOUT value. 3.3 Output Filter and Closed Loop Response The TPS56C20 relies on the output filter characteristics to ensure stability of the control loop. The recommended output filter components for common output voltages are in Table 3-1. It may be possible for other output filter component values to provide acceptable closed loop characteristics. 8 TPS56C20 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SBAU227A – MARCH 2014 – REVISED JUNE 2021 Submit Document Feedback www.ti.com Test Setup and Results 4 Test Setup and Results This section describes how to properly connect, set up, and use the TPS56C20EVM-614. The section also includes test results typical for the evaluation modules and efficiency, output load regulation, output line regulation, load transient response, output voltage ripple, start-up, and shutdown. 4.1 Input/Output Connections The TPS56C20EVM-614 provides input/output connectors and test points as shown in Table 4-1. The design requires a power supply capable of supplying 4 A to connect to J1 through a pair of 20-AWG wires. The design requires the load to connect to J3 through a pair of 20-AWG wires. The maximum load current capability is 12 A. Wire lengths must be minimized to reduce losses in the wires. Test point TP3 provides a place to monitor the VIN input voltages with TP4 (which provides a convenient ground reference). The design uses TP6 to monitor the output voltage with TP7 as the ground reference. Table 4-1. Connection and Test Points Reference Designator Function J1 PVIN input voltage connector (See Table 1-1 for PVIN range) J2 VIN input voltage connector. Not normally used J3 VOUT, 1.1V at 12A maximum JP1 PVIN to VIN jumper. Normally closed JP2 I2C interface pull up jumper for SDA JP3 I2C interface pull up jumper for SCL JP4 I2C interface grounding jumper for A1 JP5 I2C interface grounding jumper for A0 JP6 Enable Jumper. Close to disable, open to enable TP1 GND test point for VIN connector TP2 VIN test point TP3 PVIN test point TP4 GND test point for PVIN connector TP5 SW test point TP6 Output voltage test point at VOUT connector TP7 GND test point at VOUT connector TP9 Analog GND test point TP10 Test point in voltage divider network. Used for loop response measurements 4.2 Start Up Procedure Using the following procedure ensures a successful start up: 1. Make sure that the Enable jumper JP6 is closed to shunt EN to GND, disabling the output. 2. Apply the appropriate VIN voltage to PVIN (J1-1) and GND (J1-2). SBAU227A – MARCH 2014 – REVISED JUNE 2021 Submit Document Feedback TPS56C20 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 9 Test Setup and Results www.ti.com 4.3 Efficiency Figure 4-1 shows the efficiency for the TPS56C20EVM-614 at an ambient temperature of 25°C. Figure 4-1. TPS56C20EVM-614 Efficiency Figure 4-2. TPS56C20EVM-614 Efficiency (Low Current) 10 TPS56C20 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SBAU227A – MARCH 2014 – REVISED JUNE 2021 Submit Document Feedback www.ti.com Test Setup and Results 4.4 Load Regulation Figure 4-3 shows the load regulation for the TPS56C20EVM-614. Figure 4-3. TPS56C20EVM-614 Load Regulation 4.5 Line Regulation Figure 4-4 shows the line regulation for the TPS56C20EVM-614. Figure 4-4. TPS56C20EVM-614 Line Regulation SBAU227A – MARCH 2014 – REVISED JUNE 2021 Submit Document Feedback TPS56C20 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 11 Test Setup and Results www.ti.com 4.6 Load Transient Response Figure 4-5 shows the TPS56C20EVM-614 response to load transient. The current step is from 50 mA to 12 A (0% to 100% of rated load), with a slew rate of 500 mA/µs. Figure 4-5 shows the total peak-to-peak output voltage variation. Figure 4-5. TPS56C20EVM-614 Load Transient Response 4.7 Output Voltage Ripple Figure 4-6 shows the TPS56C20EVM-614 output voltage ripple. The output current is the rated full load of 12 A. Figure 4-6. TPS56C20EVM-614 Output Voltage Ripple 12 TPS56C20 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SBAU227A – MARCH 2014 – REVISED JUNE 2021 Submit Document Feedback www.ti.com Test Setup and Results 4.8 Start Up Figure 4-7 shows the TPS56C20EVM-614 start up waveform as relative to VIN. Figure 4-7. TPS56C20EVM-614 Start Up Relative to VIN Figure 4-8 shows the TPS56C20EVM-614 Start Up waveform is relative to Enable(EN). Figure 4-8. TPS56C20EVM-614 Start Up Relative to Enable SBAU227A – MARCH 2014 – REVISED JUNE 2021 Submit Document Feedback TPS56C20 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 13 Test Setup and Results www.ti.com 4.9 Shut Down Figure 4-9 shows the TPS56C20EVM-614 shut down waveform relative to VIN. Figure 4-9. TPS56C20EVM-614 Shut Down Relative to VIN Figure 4-10 shows the TPS56C20EVM-614 Shut Down waveform relative to Enable(EN). Figure 4-10. TPS56C20EVM-614 Shut Down Relative to Enable 14 TPS56C20 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SBAU227A – MARCH 2014 – REVISED JUNE 2021 Submit Document Feedback www.ti.com Board Layout 5 Board Layout This section provides a description of the TPS56C20EVM-614, PCB layout, and layer illustrations. 5.1 Board Layout Figure 5-1 through Figure 5-5 show the board layout for the TPS56C20EVM-614. The top layer contains the main power traces for PVIN, VIN, VOUT, SWITCH node, and a huge area filled with ground. Many of the signal traces are also located on the top side. The design locates the input decoupling capacitors and the voltage set point resistor divider network components as close to the IC as possible. The input and output connectors, test points, and most of the components are located on the top side. The analog ground (which is used as a return for the I2C interface signals) connects to the power ground at only one point on the top layer. Internal layer 1 and internal layer 2 are filled with power ground. The bottom layer contains a few traces like the I2C connections and the output voltage trace to the J3 connector. Figure 5-1. Top Assembly SBAU227A – MARCH 2014 – REVISED JUNE 2021 Submit Document Feedback TPS56C20 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 15 Board Layout www.ti.com Figure 5-2. Top Layer Figure 5-3. Internal Layer 1 16 TPS56C20 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SBAU227A – MARCH 2014 – REVISED JUNE 2021 Submit Document Feedback www.ti.com Board Layout Figure 5-4. Internal Layer 2 Figure 5-5. Bottom Layer SBAU227A – MARCH 2014 – REVISED JUNE 2021 Submit Document Feedback TPS56C20 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 17 Schematic, Bill of Materials and Reference www.ti.com 6 Schematic, Bill of Materials and Reference This section presents the TPS56C20EVM-614 schematic, bill of materials (BOM), and reference. 6.1 Schematic SH-J2 9 7 5 3 1 SH-J3 I2C_VIN 1 2 JP3 SH-J5 I2C_A0_PD I2C_A1 I2C_A0 JP4 JP5 1 2 JP2 N2510-6002-RB SH-J4 I2C_A1_PD 1 2 J4 10 8 6 4 PGND 2 1 2 Figure 6-1 shows the schematic for the TPS56C20EVM. R4 R3 10.0k 10.0k PGND SH-J6 PGND VIN R1 1.00k JP6 2 1 R2 1.00k PGND PGND U1 TPS56C20PWP PGND TP1 J2 2 1 2 VIN 3 VIN PGND 4 5 VIN SH-J1 TP2 JP1 2 1 PVIN VIN 6 C3 4.7µF 7 PGND PVIN PVIN = 4.5 - 17V PGND TP3 J1 1 2 C14 10µF C13 10µF C4 10µF 8 C5 10µF 9 10 TP4 PGND 11 PGND 12 EN VFB SDA VOUT SCL SS A1 GND A0 VREG5 VIN PGOOD PVIN VBST PVIN SW PGND SW PGND SW PGND SW PGND PAD SW 24 23 C11 0.01µF 22 TP9 21 C10 R8 22k PGND 20 TP8 19 3.3µF C9 18 17 0.1µF R5 10.0k VIN TP10 R7 18.2k C12 J3 L1 16 PGND VOUT .60V - 1.87V R6 51 TP5 TP6 TP7 2 1 1 15 1.5µH PGND 14 C6 100µF 13 PGND C7 C8 PGND NOTE: TPS56520,720,920 C10=2.2uF NOTE: TPS56C20 C10=3.3uF NOTE: TPS56520: Wurth 1.5uH Inductor:74437346015 NOTE: TPS56720,TPS56920: Wurth 1.5uH Inductor:744311150 NOTE: TPS56C20: Wurth 1.5uH Inductor:744323150 Figure 6-1. TPS56C20EVM-614 Schematic Diagram 18 TPS56C20 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SBAU227A – MARCH 2014 – REVISED JUNE 2021 Submit Document Feedback www.ti.com Schematic, Bill of Materials and Reference 6.2 Bill of Materials Table 6-1 lists the BOM for the TPS56C20EVM. Table 6-1. TPS56C20EVM-614 Bill of Materials Designator Quanti Value ty Description Package Reference Part Number Manufacturer C3 1 4.7uF CAP, CERM, 4.7uF, 10V, +/-10%, X5R, 0805 0805 0805ZD475KAT2A AVX C4, C5, C13, C14 4 10uF CAP, CERM, 10uF, 35V, +/-10%, X7R, 1210 1210 GRM32ER7YA106K A12L MuRata C6 1 100uF CAP, CERM, 100uF, 6.3V, +/-20%, X5R, 1210 1210 C1210C107M9PACT Kemet U C9 1 0.1uF CAP, CERM, 0.1uF, 25V, +/-10%, X7R, 0603 0603 06033C104KAT2A AVX C10 1 3.3uF CAP, CERM, 3.3uF, 25V, +/-10%, X5R, 0603 0603 C1608X5R1E335K0 80AC TDK C11 1 0.01uF CAP, CERM, 0.01uF, 50V, +/-5%, X7R, 0603 0603 C0603C103J5RACT U Kemet J1, J3 2 TERMINAL BLOCK 5.08MM VERT 2POS TERM_BLK, 2pos, 5.08mm ED120/2DS On-Shore Technology, Inc. J2 1 Terminal Block, 6A, 3.5mm Pitch, 2-Pos, TH 7.0x8.2x6.5mm ED555/2DS On-Shore Technology, Inc. J4 1 Header (shrouded), 100mil, 5x2, HighTemperature, Gold, TH 5x2 Shrouded header N2510-6002-RB 3M JP1, JP2, JP3, JP4, JP5, JP6 6 Header, TH, 100mil, 2x1, Gold plated, 230 mil above insulator TSW-102-07-G-S TSW-102-07-G-S Samtec, Inc. L1 1 Inductor, Shielded Drum Core, WESuperflux200, 1.5uH, 12A, 0.0066 ohm, SMD WE-HC5 744323150 Wurth Elektronik eiSos LBL1 1 Thermal Transfer Printable Labels, 0.650" W x 0.200" H - 10,000 per roll PCB Label 0.650"H x THT-14-423-10 0.200"W Brady R1, R2 2 1.00k RES, 1.00k ohm, 1%, 0.1W, 0603 0603 CRCW06031K00FK EA Vishay-Dale R3, R4, R5 3 10.0k RES, 10.0k ohm, 1%, 0.1W, 0603 0603 CRCW060310K0FK EA Vishay-Dale R6 1 51 RES, 51 ohm, 5%, 0.1W, 0603 0603 CRCW060351R0JN EA Vishay-Dale R7 1 18.2k RES, 18.2k ohm, 1%, 0.1W, 0603 0603 CRCW060318K2FK EA Vishay-Dale R8 1 22k RES, 22k ohm, 5%, 0.1W, 0603 0603 CRCW060322K0JN EA Vishay-Dale SH-J1, SH-J2, SHJ3, SH-J4, SH-J5, SH-J6 6 1x2 Shunt, 100mil, Gold plated, Black Shunt 969102-0000-DA 3M TP1 1 Black Test Point, TH, Miniature, Black Keystone5001 5001 Keystone TP2, TP5, TP8, TP10 4 Red Test Point, TH, Miniature, Red Keystone5000 5000 Keystone TP3, TP6 2 Red Test Point, Miniature, Red, TH Red Miniature Testpoint 5000 Keystone TP4, TP7, TP9 3 Black Test Point, Miniature, Black, TH Black Miniature Testpoint 5001 Keystone U1 1 4.5V to 17V Input, 12A/9A/7A/5A Output, Synchronous Step-Down Voltage Regulator with Voltage Margining, PWP0024G PWP0024G TPS56C20PWP Texas Instruments 1.5uH 6.3 Reference TPS56C20,TPS56920, TPS56720, TPS56520 data sheet (SLVSCB6). 7 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision * (March 2014) to Revision A (May 2021) Page • Changed user's guide title.................................................................................................................................. 3 SBAU227A – MARCH 2014 – REVISED JUNE 2021 Submit Document Feedback TPS56C20 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 19 Revision History • 20 www.ti.com Updated the numbering format for tables, figures, and cross-references throughout the document. ................3 TPS56C20 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SBAU227A – MARCH 2014 – REVISED JUNE 2021 Submit Document Feedback IMPORTANT NOTICE AND DISCLAIMER TI PROVIDES TECHNICAL AND RELIABILITY DATA (INCLUDING DATA SHEETS), DESIGN RESOURCES (INCLUDING REFERENCE DESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND OTHER RESOURCES “AS IS” AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS AND IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY RIGHTS. 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