TPS54622EVM-012

www.ti.com Table of Contents User’s Guide TPS54622 Step-Down Converter Evaluation Module User's Guide ABSTRACT This user’s guide contains background information for the TPS54622 as well as support documentation for the TPS54622EVM-012 evaluation module (PWR012). Also included are the performance specifications, the schematic, and the bill of materials for the TPS54622EVM-012. Table of Contents 1 Introduction.............................................................................................................................................................................2 2 Test Setup and Results.......................................................................................................................................................... 4 3 Board Layout......................................................................................................................................................................... 11 4 Schematic and Bill of Materials...........................................................................................................................................14 5 Revision History................................................................................................................................................................... 15 List of Figures Figure 2-1. TPS54622EVM-012 Efficiency.................................................................................................................................. 5 Figure 2-2. TPS54622EVM-012 Low Current Efficiency..............................................................................................................5 Figure 2-3. TPS54622EVM-012 Load Regulation....................................................................................................................... 6 Figure 2-4. TPS54622EVM-012 Line Regulation........................................................................................................................ 6 Figure 2-5. TPS54622EVM-012 Transient Response................................................................................................................. 7 Figure 2-6. TPS54622EVM-012 Loop Response........................................................................................................................ 7 Figure 2-7. TPS54622EVM-012 Output Ripple........................................................................................................................... 8 Figure 2-8. TPS54622EVM-012 Input Ripple.............................................................................................................................. 8 Figure 2-9. TPS54622EVM-012 Start-Up Relative to VIN ........................................................................................................... 9 Figure 2-10. TPS54622EVM-012 Start-Up Relative to Enable....................................................................................................9 Figure 2-11. TPS54622EVM-012 Start Up Into Pre-Bias...........................................................................................................10 Figure 2-12. TPS54622EVM-012 Hiccup Mode Current Limit...................................................................................................10 Figure 3-1. TPS54622EVM-012 Top-Side Layout..................................................................................................................... 12 Figure 3-2. TPS54622EVM-012 Layout 2..................................................................................................................................12 Figure 3-3. TPS54622EVM-012 Layout 3..................................................................................................................................13 Figure 3-4. TPS54622EVM-012 Bottom-Side Layout................................................................................................................13 Figure 3-5. TPS54622EVM-012 Top-Side Assembly.................................................................................................................13 Figure 4-1. TPS54622EVM-012 Schematic...............................................................................................................................14 List of Tables Table 1-1. Input Voltage and Output Current Summary...............................................................................................................2 Table 1-2. TPS54622EVM-012 Performance Specification Summary.........................................................................................2 Table 1-3. Output Voltages Available...........................................................................................................................................3 Table 2-1. EVM Connectors and Test Points............................................................................................................................... 4 Table 4-1. TPS54622EVM-012 Bill of Materials.........................................................................................................................15 Trademarks All trademarks are the property of their respective owners. SLVU441B – MAY 2011 – REVISED AUGUST 2021 Submit Document Feedback TPS54622 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 1 Introduction www.ti.com 1 Introduction 1.1 Background The TPS54622 dc/dc converter is designed to provide up to a 6-A output. The TPS54622 implements split-input power rails with separate input voltage inputs for the power stage and control circuitry. The power stage input (PVIN) is rated for 1.6 V to 17 V whereas the control input (VIN) is rated for 4.5 V to 17 V. The TPS54622EVM-012 provides both inputs but is designed and tested using the PVIN connected to VIN. Rated input voltage and output current range for the evaluation module are given in Table 1-1. This evaluation module is designed to demonstrate the small printed-circuit-board areas that may be achieved when designing with the TPS54622 regulator. The switching frequency is externally set at a nominal 480 kHz. The high-side and low-side MOSFETs are incorporated inside the TPS54622 package along with the gate drive circuitry. The low drain-to-source on resistance of the MOSFET allows the TPS54622 to achieve high efficiencies and helps keep the junction temperature low at high output currents. The compensation components are external to the integrated circuit (IC), and an external divider allows for an adjustable output voltage. Additionally, the TPS54622 provides adjustable slow start, tracking, and undervoltage lockout inputs. The absolute maximum input voltage is 20 V for the TPS54622EVM-012. Table 1-1. Input Voltage and Output Current Summary EVM INPUT VOLTAGE RANGE OUTPUT CURRENT RANGE TPS54622EVM-012 VIN = 8 V to 17 V (VIN start voltage = 6.521 V) 0 A to 6 A 1.2 Performance Specification Summary A summary of the TPS54622EVM-012 performance specifications is provided in Table 1-2. Specifications are given for an input voltage of VIN = 12 V and an output voltage of 3.3 V, unless otherwise specified. The TPS54622EVM-012 is designed and tested for VIN = 8 V to 17 V with the VIN and PVIN pins connect together with the J5 jumper. The ambient temperature is 25°C for all measurements, unless otherwise noted. Table 1-2. TPS54622EVM-012 Performance Specification Summary SPECIFICATION TEST CONDITIONS VIN voltage range (PVIN = VIN) MIN TYP MAX 8 12 17 V VIN start voltage 6.528 V VIN stop voltage 6.19 V 3.3 V Output voltage set point Output current range VIN = 8 V to 17 V Line regulation IO = 3 A, VIN = 8 V to 17 V ±0.02 Load regulation VIN = 12 V, IO = 0 A to 6 A ±0.013 IO = 1.5 A to 4.5 A Load transient response IO = 4.5 A to 1.5 A 0 6 A % % Voltage change –150 Recovery time 200 µs Voltage change 150 mV Recovery time mV 200 µs 44.7 kHz Loop bandwidth VIN = 12 V, IO = 1.9 A Phase margin VIN = 12 V , IO = 1.9 A 54 ° Input ripple voltage IO = 6 A 420 mVPP Output ripple voltage IO = 6 A 18 mVPP 6 ms 480 kHz 94.9 % Output rise time Operating frequency Maximum efficiency 2 UNIT TPS54622EVM-012, VIN = 8 V, IO = 2 A TPS54622 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU441B – MAY 2011 – REVISED AUGUST 2021 Submit Document Feedback www.ti.com Introduction 1.3 Modifications These evaluation modules are designed to provide access to the features of the TPS54622. Some modifications can be made to this module. 1.3.1 Output Voltage Set Point The output voltage is set by the resistor divider network of R6 and R7. R6 is fixed at 10 kΩ. To change the output voltage of the EVM, it is necessary to change the value of resistor R7. Changing the value of R7 can change the output voltage above 0.6 V. The value of R7 for a specific output voltage can be calculated using Equation 1. R7= 10 k W´ 0.6 V VOUT - 0.6V (1) Table 1-3 lists the R8 values for some common output voltages. Note that VIN must be in a range so that the minimum on-time is greater than 120 ns, and the maximum duty cycle is less than 95%. The values given in Table 1-3 are standard values, not the exact value calculated using Equation 1. Table 1-3. Output Voltages Available Output Voltage (V) R7 Value (kΩ) 1.8 4.99 2.5 3.16 3.3 2.21 5 1.37 1.3.2 Slow-Start Time The slow-start time can be adjusted by changing the value of C9. Use Equation 2 to calculate the required value of C9 for a desired slow-start time C9(nF) = Tss (ms ) ´ Iss(mA ) Vref ( V ) (2) The EVM is set for a slow-start time of approximately 6 ms using C9 = 0.01 µF. 1.3.3 Track In The TPS54622 can track an external voltage during start-up. The J5 connector is provided to allow connection to that external voltage. Ratiometric or simultaneous tracking can be implemented using resistor divider R5 and R6. See the TPS54622 data sheet (SLVSA70) for details. 1.3.4 Adjustable UVLO The undervoltage lockout (UVLO) can be adjusted externally using R1 and R2. The EVM is set for a start voltage of 6.528 V and a stop voltage of 6.190 V using R1 = 35.7 kΩ and R2 = 8.06 kΩ. Use Equation 3 and Equation 4 to calculate required resistor values for different start and stop voltages. æV ö VSTART ç ENFALLING ÷ - VSTOP VENRISING ø è R1= æ V ö Ip ç 1- ENFALLING ÷ +Ih è VENRISING ø R2= (3) R1× VENFALLING VSTOP - VENFALLING +R1(Ip +Ih) SLVU441B – MAY 2011 – REVISED AUGUST 2021 Submit Document Feedback (4) TPS54622 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 3 Introduction www.ti.com 1.3.5 Input Voltage Rails The EVM is designed to accommodate different input voltage levels for the power stage and control logic. During normal operation, the PVIN and VIN inputs are connected using a jumper across J5. The single input voltage is supplied at J1. If desired, these two input voltage rails may be separated by removing the jumper across J5. Two input voltages must then be provided at both J1 and J4. 2 Test Setup and Results This section describes how to properly connect, set up, and use the TPS54622EVM-012 evaluation module. The section also includes test results typical for the evaluation module and covers efficiency, output voltage regulation, load transients, loop response, output ripple, input ripple, and start-up. 2.1 Input/Output Connections The TPS54622EVM-012 is provided with input/output connectors and test points as shown in Table 2-1. A power supply capable of supplying 4 A must be connected to J1 through a pair of 20 AWG wires. The jumper across J5 must be in place. See Section 1.3.5 for split-input voltage rail operation. The load must be connected to J2 through a pair of 20 AWG wires. The maximum load current capability must be 6 A. Wire lengths must be minimized to reduce losses in the wires. Test-point TP1 provides a place to monitor the VIN input voltages with TP2 providing a convenient ground reference. TP3 is used to monitor the output voltage with TP5 as the ground reference. Table 2-1. EVM Connectors and Test Points Reference Designator 4 Function J1 PVIN input voltage connector. (See Table 1-1 for VIN range.) J2 VOUT, 3.3 V at 6 A maximum. J3 2-pin header for enable. Connect EN to ground to disable, open to enable. J4 VIN input voltage connector. Not normally used. J5 PVIN to VIN jumper. Normally closed to tie VIN to PVIN for common rail voltage operation. J6 2-pin header for tracking voltage input and ground. J7 2-pin header for tracking output and ground. TP1 PVIN test point at PVIN connector. TP2 GND test point at PVIN connector. TP3 Output voltage test point at VOUT connector. TP4 PH test point. TP5 GND test point at VOUT connector. TP6 Test point between voltage divider network and output. Used for loop response measurements. Slow start/track in test point. TP7 COMP pin test point. TP8 VIN test point at VIN connector. TP9 GND test point at VIN connector. TPS54622 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU441B – MAY 2011 – REVISED AUGUST 2021 Submit Document Feedback www.ti.com Test Setup and Results 2.2 Efficiency The efficiency of this EVM peaks at a load current of about 2 A and then decreases as the load current increases toward full load. Figure 2-1 shows the efficiency for the TPS54622EVM-012 at an ambient temperature of 25°C. 100 95 90 Efficiency - % 85 VIN = 8 V VIN = 12 V 80 VIN = 17 V 75 70 65 60 55 50 0 1 2 3 Output Current - A 4 5 6 Figure 2-1. TPS54622EVM-012 Efficiency Figure 2-2 shows the efficiency for the TPS54622EVM-012 using a semi-log scale to more easily show efficiency at lower output currents. The ambient temperature is 25°C. 100 VIN = 17 V VIN = 12 V 90 80 VIN = 8 V Efficiency - % 70 60 50 40 30 20 10 0 0.01 0.1 1.0 10.0 Output Current - A Figure 2-2. TPS54622EVM-012 Low Current Efficiency The efficiency may be lower at higher ambient temperatures, due to temperature variation in the drain-to-source resistance of the internal MOSFET. SLVU441B – MAY 2011 – REVISED AUGUST 2021 Submit Document Feedback TPS54622 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 5 Test Setup and Results www.ti.com 2.3 Output Voltage Load Regulation Figure 2-3 shows the load regulation for the TPS54622EVM-012. 0.4 Output Voltage Deviation - % 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 0 1 2 3 Output Current - A 5 4 6 Figure 2-3. TPS54622EVM-012 Load Regulation Measurements are given for an ambient temperature of 25°C. 2.4 Output Voltage Line Regulation Figure 2-4 shows the line regulation for the TPS54622EVM-012. 0.4 Output Voltage Deviation - % 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 8 9 10 11 13 12 Input Voltage - V 14 15 16 17 Figure 2-4. TPS54622EVM-012 Line Regulation 6 TPS54622 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU441B – MAY 2011 – REVISED AUGUST 2021 Submit Document Feedback www.ti.com Test Setup and Results 2.5 Load Transients Figure 2-5 shows the TPS54622EVM-012 response to load transients. The current step is from 25% to 75% of maximum rated load at 12-V input. The current step slew rate is 100 mA / µsec. Total peak-to-peak voltage variation is as shown, including ripple and noise on the output. VOUT = 100 mV / div (dc coupled, -3.13 V offset) IOUT = 2 A / div Load step = 1.5 A to 4.5 A Slew rate = 100 mA / µsec Time = 200 µsec / div Figure 2-5. TPS54622EVM-012 Transient Response 2.6 Loop Characteristics Figure 2-6 shows the TPS54622EVM-012 loop-response characteristics. Gain and phase plots are shown for VIN voltage of 12 V. Load current for the measurement is 1.9 A. 60 180 50 150 Phase 120 30 90 20 60 10 30 0 0 Gain -10 -30 -20 -60 -30 -90 -40 -120 -50 -150 -60 100 1000 10000 100000 Phase - Degrees Gain - dB 40 -180 1000000 Frequency - Hz Figure 2-6. TPS54622EVM-012 Loop Response SLVU441B – MAY 2011 – REVISED AUGUST 2021 Submit Document Feedback TPS54622 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 7 Test Setup and Results www.ti.com 2.7 Output Voltage Ripple Figure 2-7 shows the TPS54622EVM-012 output voltage ripple. The output current is the rated full load of 6 A and VIN = 12 V. The ripple voltage is measured directly across the output capacitors. VOUT = 20 mV / div (ac coupled) PH = 5 V / div Time = 1 µsec / div Figure 2-7. TPS54622EVM-012 Output Ripple 2.8 Input Voltage Ripple Figure 2-8 shows the TPS54622EVM-012 input voltage. The output current is the rated full load of 6 A and VIN = 12 V. The ripple voltage is measured directly across the input capacitors. VIN = 500 mV / div PH = 5 V / div Time = 1 µsec / div Figure 2-8. TPS54622EVM-012 Input Ripple 8 TPS54622 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU441B – MAY 2011 – REVISED AUGUST 2021 Submit Document Feedback www.ti.com Test Setup and Results 2.9 Powering Up Figure 2-9 and Figure 2-10 show the start-up waveforms for the TPS54622EVM-012. In Figure 2-9, the output voltage ramps up as soon as the input voltage reaches the UVLO threshold as set by the R1 and R2 resistor divider network. In Figure 2-10, the input voltage is initially applied and the output is inhibited by using a jumper at J3 to tie EN to GND. When the jumper is removed, EN is released. When the EN voltage reaches the enable-threshold voltage, the start-up sequence begins and the output voltage ramps up to the externally set value of 3.3 V. The input voltage for these plots is 12 V and the load is 1 Ω. VIN = 5 V / div VOUT = 1 V / div Time = 2 msec / div Figure 2-9. TPS54622EVM-012 Start-Up Relative to VIN VIN = 5 V / div EN = 2 V / div VOUT = 2 V / div Time = 2 msec / div Figure 2-10. TPS54622EVM-012 Start-Up Relative to Enable SLVU441B – MAY 2011 – REVISED AUGUST 2021 Submit Document Feedback TPS54622 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 9 Test Setup and Results www.ti.com 2.10 Pre-Bias Start-Up The TPS54622 is designed to start up into a pre-biased output. The output voltage is not discharged to ground at the beginning of the slow-start sequence. Figure 2-11 shows the start-up waveform with the output voltage pre-biased to 1 V. VIN = 10 V / div VOUT = 2 V / div PH = 10 V / div Time = 2 msec / div Figure 2-11. TPS54622EVM-012 Start Up Into Pre-Bias 2.11 Hiccup Mode Current Limit The TPS54622 features hiccup mode current limit. When an overcurrent event occurs, the TPS54622 shuts down and restarts. Figure 2-12 shows restart sequence in an over current condition. VOUT = 2 V / div PH = 10 V / div Inductor Current = 5 A / div Time = 20 msec / div Figure 2-12. TPS54622EVM-012 Hiccup Mode Current Limit 10 TPS54622 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU441B – MAY 2011 – REVISED AUGUST 2021 Submit Document Feedback www.ti.com Board Layout 3 Board Layout This section provides a description of the TPS54622EVM-012 board layout and layer illustrations. 3.1 Layout The board layout for the TPS54622EVM-012 is shown in Figure 3-1 through Figure 3-5. The top-side layer of the EVM is laid out in a manner typical of a user application. The top, bottom, and internal layers are 2-oz. copper. The top layer contains the main power traces for PVIN, VIN, VOUT, and VPHASE. Also on the top layer are connections for the remaining pins of the TPS54622 and a large area filled with ground. The bottom and internal ground layers contain ground planes only. The top-side ground traces are connected to the bottom and internal ground planes with multiple vias placed around the board including two vias directly under the TPS54622 device to provide a thermal path from the top-side ground plane to the bottom-side ground plane. The input decoupling capacitors (C1, and C2) and bootstrap capacitor (C3) are all located as close to the IC as possible. Additionally, the voltage set-point resistor divider components are kept close to the IC. The voltage divider network ties to the output voltage at the point of regulation, the copper VOUT trace at the J2 output connector. For the TPS54622, an additional input bulk capacitor may be required, depending on the EVM connection to the input supply. Critical analog circuits such as the voltage setpoint divider, frequency set resistor, slow-start capacitor, and compensation components are terminated to ground using a wide ground trace separate from the power ground pour. SLVU441B – MAY 2011 – REVISED AUGUST 2021 Submit Document Feedback TPS54622 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 11 Board Layout www.ti.com Figure 3-1. TPS54622EVM-012 Top-Side Layout Figure 3-2. TPS54622EVM-012 Layout 2 12 TPS54622 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU441B – MAY 2011 – REVISED AUGUST 2021 Submit Document Feedback www.ti.com Board Layout Figure 3-3. TPS54622EVM-012 Layout 3 Figure 3-4. TPS54622EVM-012 Bottom-Side Layout Figure 3-5. TPS54622EVM-012 Top-Side Assembly SLVU441B – MAY 2011 – REVISED AUGUST 2021 Submit Document Feedback TPS54622 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 13 Schematic and Bill of Materials www.ti.com 4 Schematic and Bill of Materials This section presents the TPS54622EVM-012 schematic and bill of materials. 4.1 Schematic TRACK OUT 2 1 TRACK IN 1 2 1 2 EN GND R7 2.21k J6 V_SNS C10 Open R6 10.0k TP6 SS/TR R2 8.06k C8 4.7uF R1 35.7k C11 open C2 10uF J3 TP9 1 VIN GND PVIN GND J4 2 2 VIN TP8 1 J5 PVIN 1 J1 2 TP2 EN C1 Open VIN = 8 - 17 V TP1 Open R9 Open 15 COMP VIN V_SNS V_SNS 7 PVIN 5 4 6 PVIN GND 3 GND C4 0.01uf R4 3.74k 8 EN 9 10 EN PH PH 11 12 13 BOOT PWRGD RT/CLK 1 R3 100k 2 U1 PWPD TPS54622RGY 14 C3 0.1uF TP4 C5 47pF TP7 L1 3.3uH C9 0.022uf C6 100uF R8 C7 open R5 51.1 GND TP5 VOUT = 3.3 V, 6 A TP3 2 1 J7 GND GND J2 VOUT Figure 4-1 is the schematic for the TPS54622EVM-012. Figure 4-1. TPS54622EVM-012 Schematic 14 TPS54622 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU441B – MAY 2011 – REVISED AUGUST 2021 Submit Document Feedback www.ti.com Schematic and Bill of Materials 4.2 Bill of Materials Table 4-1 presents the bill of materials for the TPS54622EVM-012. Table 4-1. TPS54622EVM-012 Bill of Materials Count RefDes Value Description Size Part Number MFR 0 C1 Open Capacitor, Ceramic 1210 Std Std 1 C2 10µF Capacitor, Ceramic, 25V, X5R, 20% 1210 Std Std 1 C3 0.1µF Capacitor, Ceramic, 25V, X7R, 10% 0603 Std Std 1 C4 0.01µF Capacitor, Ceramic, 25V, X7R, 10% 0603 Std Std 1 C5 47pF Capacitor, Ceramic, 50V, COG, 10% 0603 Std Std 1 C6 100µF Capacitor, Ceramic, 6.3V, X5R, 20% 1206 Std Std 0 C7 Open Capacitor, Ceramic 1206 Std Std 1 C8 4.7µF Capacitor, Ceramic, 25V, X5R, 10% 0805 Std Std 1 C9 0.022µF Capacitor, Ceramic, 25V, X5R, 10% 0603 Std Std 0 C10, C11 Open Capacitor, Ceramic 0603 Std Std 3 J1, J2, J4 ED555/2DS Terminal Block, 2-pin, 6-A, 3.5mm 0.27 x 0.25 inch ED555/2DS OST 4 J3, J5, J6, J7 PEC02SAAN Header, Male 2-pin, 100mil spacing 0.100 inch x 2 PEC02SAAN Sullins 1 L1 3.3µH Inductor, SMT, 7.2A, 10.4milliohm 0.402 sq inch MSS1048-332 NL_ Coilcraft 1 R1 35.7k Resistor, Chip, 1/16W, 1% 0603 Std Std 1 R2 8.06k Resistor, Chip, 1/16W, 1% 0603 Std Std 1 R3 100k Resistor, Chip, 1/16W, 1% 0603 Std Std 1 R4 3.74k Resistor, Chip, 1/16W, 1% 0603 Std Std 1 R5 51.1 Resistor, Chip, 1/16W, 1% 0603 Std Std 1 R6 10.0k Resistor, Chip, 1/16W, 1% 0603 Std Std 1 R7 2.21k Resistor, Chip, 1/16W, 1% 0603 Std Std 0 R8, R9 Open Resistor, Chip, 1/16W, 1% 0603 Std Std 6 TP1, TP3, TP4, TP6, TP7, TP8 5000 Test Point, Red, Thru Hole Color Keyed 0.100 x 0.100 inch 5000 Keystone 3 TP2, TP5, TP9 5001 Test Point, Black, Thru Hole Color Keyed 0.100 x 0.100 inch 5001 Keystone 1 U1 TPS54622RHL IC, 1.6V-17V Synchronous Buck PWM Converter with Integrated MOSFET 3.5mm x TPS54622RG 3.3mm QFN14 HL TI 2 — Shunt, 100-mil, Black 0.100 929950-00 3M 1 — Label (see note 5) 1.25 x 0.25 inch THT-13-457-10 Brady 1 — PCB, 2.5” x 2.5” x 0.062” PWR012 Any Notes 1. 2. 3. 4. 5. These assemblies are ESD sensitive, ESD precautions shall be observed. These assemblies must be clean and free from flux and all contaminants. Use of no clean flux is not acceptable. These assemblies must comply with workmanship standards IPC-A-610 Class 2. Ref designators marked with an asterisk (‘**’) cannot be substituted. All other components can be substituted with equivalent MFG's components. Install label in silkscreened box after final wash. Text shall be 8 pt font 5 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. SLVU441B – MAY 2011 – REVISED AUGUST 2021 Submit Document Feedback TPS54622 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 15 Revision History www.ti.com Changes from Revision A (September 2011) to Revision B (August 2021) Page • Updated user's guide title................................................................................................................................... 2 • Updated the numbering format for tables, figures, and cross-references throughout the document. ................2 16 TPS54622 Step-Down Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU441B – MAY 2011 – REVISED AUGUST 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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