TPS40074EVM-001

www.ti.com Table of Contents User’s Guide TPS40074 Buck Controller Evaluation Module User's Guide Table of Contents 1 Introduction.............................................................................................................................................................................2 1.1 Description......................................................................................................................................................................... 2 1.2 Applications........................................................................................................................................................................2 1.3 Features............................................................................................................................................................................. 2 2 TPS40074EVM-001 Electrical Performance Specifications................................................................................................ 2 3 Schematic ...............................................................................................................................................................................4 3.1 Adjusting Output Voltage (R5 and R6)............................................................................................................................... 5 3.2 Using Remote Sense (J3).................................................................................................................................................. 5 3.3 5V Input Operation (R10 and R15).................................................................................................................................... 5 4 Test Setup................................................................................................................................................................................6 4.1 Equipment.......................................................................................................................................................................... 6 4.2 Equipment Setup................................................................................................................................................................7 4.3 Start-Up/Shutdown Procedure........................................................................................................................................... 8 4.4 Equipment Shutdown......................................................................................................................................................... 8 5 TPS40074EVM Typical Performance Data and Characteristic Curves...............................................................................9 5.1 Efficiency............................................................................................................................................................................9 5.2 Line and Load Regulation.................................................................................................................................................. 9 6 EVM Assembly Drawings and Layout.................................................................................................................................10 7 List of Materials.....................................................................................................................................................................13 8 Revision History................................................................................................................................................................... 14 List of Figures Figure 3-1. TPS40074EVM-001 Power Stage/Control Schematic Reference Only, See Table 3 for Specific Values................. 4 Figure 4-1. TPS40074EVM-001 Recommended Test Setup....................................................................................................... 7 Figure 4-2. Output Ripple Measurement – Tip and Barrel using TP15 and TP16....................................................................... 8 Figure 5-1. TPS40074EVM-001 Efficiency V12V_IN = 10 V–14 V, V1V5_OUT = 1.5 V, I1V5_OUT = 0 A–15 A...................................9 Figure 5-2. TPS40074EVM-001 Line and Load Regulation – ±1% Window............................................................................... 9 Figure 6-1. TPS40074EVM-001 Component Placement (Viewed from Top).............................................................................10 Figure 6-2. TPS40074EVM-001 Silkscreen (Viewed from Top).................................................................................................10 Figure 6-3. TPS40074EVM-001 Top Copper (Viewed from Top)............................................................................................... 11 Figure 6-4. TPS40074EVM-001 Layer 2 (X-Ray View from Top)...............................................................................................11 Figure 6-5. TPS40074EVM-001 Layer 3 (X-Ray View from Top).............................................................................................. 12 Figure 6-6. TPS40074EVM-001 Bottom Copper (X-Ray View from Top).................................................................................. 12 List of Tables Table 2-1. TPS40074EVM-001 Electrical and Performance Specifications.................................................................................2 Table 3-1. Adjusting V1V5_OUT With R14...................................................................................................................................... 5 Table 7-1. TPS40074EVM-001 Bill of Materials.........................................................................................................................13 Trademarks All trademarks are the property of their respective owners. SLUU231A – JUNE 2006 – REVISED JANUARY 2022 Submit Document Feedback TPS40074 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated 1 Introduction www.ti.com 1 Introduction The TPS40074EVM-001 evaluation module (EVM) is a synchronous buck converter providing a fixed 1.5-V output at up to 15 A from a 12-V input bus. The EVM is designed to start up from a single supply, so no additional bias voltage is required for start-up. The module uses the TPS40074 high frequency controller with remote sense. 1.1 Description The TPS40074EVM-001 is designed to use a regulated 12-V (between 10-V and 14-V) bus to produce a high current, regulated 1.5-V output at up to 15 A of load current. The TPS40074EVM-001 is design to demonstrate the TPS40074 in a typical regulated bus to low-voltage application while providing a number of test points to evaluate the performance of the TPS40074 in a given application. The EVM can be modified to support output voltages from 0.9 V to 3.3 V by changing a single resistor. The TPS40074EVM-001 has been built to the sample application used in the TPS40074 Midrange Input Synchronous Buck Controller With Voltage Feed-Forward Data Sheet, except the switching frequency has been lowered to 400 kHz to reduce switching losses in the power FETs, and the RKFF resistor (R10) increased to maintain the UVLO level. 1.2 Applications • • • • • Non-isolated medium current point of load and low voltage bus converters Merchant power modules Networking equipment Telecommunications equipment DC power distributed systems 1.3 Features • • • • • • • • 10-V to 14-V input range 1.5-V fixed output, adjustable with single resistor 15-ADC steady state output current 400-kHz switching frequency Single main switch MOSFET and single synchronous rectifier MOSFET single Component side, surface mount design on a 3-inch × 3-inch evaluation board Four-layer PCB with all components on the top side Convenient test points for probing critical waveforms and non-invasive loop response testing 2 TPS40074EVM-001 Electrical Performance Specifications Table 2-1. TPS40074EVM-001 Electrical and Performance Specifications PARAMETER NOTES AND CONDITIONS MIN TYP MAX UNIT INPUT CHARACTERISTICS Input voltage range 10 Max input current VIN = 10 V, IOUT = 15 A No-load input current VIN = 14 V, IOUT = 0 A 14 2.75 V A 45 mA OUTPUT CHARACTERISTICS Output voltage R6 = 9.53 k, R5 = 105 k Output voltage regulation Line regulation (10 V < VIN < 14 V, IOUT = 5 A) 1% Load regulation (10 V < IOUT < 15 A, VIN = 12 V) 1% Output voltage ripple 1.45 VIN = 14 V, IOUT = 15 A 1.50 25 Output load current 0 Output over current 1.55 V 50 mVpp 15 A 23 A SYSTEM CHARACTERISTICS Switching frequency Peak efficiency 2 360 VOUT = 1.5 V, 8 A < IOUT < 12 A 400 V12V_IN = 10 V 87% V12V_IN = 12 V 85% V12V_IN = 14 V 83% TPS40074 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated 440 kHz SLUU231A – JUNE 2006 – REVISED JANUARY 2022 Submit Document Feedback www.ti.com TPS40074EVM-001 Electrical Performance Specifications Table 2-1. TPS40074EVM-001 Electrical and Performance Specifications (continued) PARAMETER Full load efficiency NOTES AND CONDITIONS VOUT = 1.5 V, IOUT = 15 A SLUU231A – JUNE 2006 – REVISED JANUARY 2022 Submit Document Feedback MIN TYP V12V_IN = 10 V 84% V12V_IN = 12 V 83% V12V_IN = 14 V 81% MAX UNIT TPS40074 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated 3 Schematic www.ti.com + + + + + 3 Schematic Figure 3-1. TPS40074EVM-001 Power Stage/Control Schematic Reference Only, See Table 3 for Specific Values 4 TPS40074 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated SLUU231A – JUNE 2006 – REVISED JANUARY 2022 Submit Document Feedback www.ti.com Schematic 3.1 Adjusting Output Voltage (R5 and R6) The regulated output voltage can be adjusted within a limited range by changing the ground resistor in the feedback resistor divider (R6 and R5). The output voltage is given by Equation 1. V VOUT +V VREF R5 ) R65 ) R3 R5 ) R6 (1) where • • VVREF = 0.700 V R3 = 10.0 kΩ Table 3-1 contains common values for R6 to generate popular output voltages with R5 open R5 can be used to increase the accuracy that can be obtained without using more expensive resistors. The TPS40074EVM-001 is stable through these output voltages but the efficiency can suffer as the power stage is optimized for the 1.5-V output. Table 3-1. Adjusting V1V5_OUT With R14 VOUT R16 3.3 V(1) 2.67 K 2.5 V(1) 3.83 K 2.2 V(1) 4.64 K V(1) 8.36 K 2.0 (1) 1.8 V 6.34 K 1.5 V 8.66 K 1.2 V 14.0 K Due to higher duty cycles associated with higher output voltages or lower input voltages, output current should be limited to 10 A when operating with output voltages greater than 2.0 V or input voltages below 6 V to reduce conduction losses in the main switching FET (Q1). Under these conditions, a lower RdsON FET would normally be selected. 3.2 Using Remote Sense (J3) The TPS40074EVM-001 provides the user with remote sense capabilities through the connector J3. When remote sense is used, J3 should be connected at the load to provide more accurate load regulation by compensating for losses over the terminal connections and load wire connections. When remote sense is connected the output voltage measured between TP15 and TP16 can show a positive load regulation characteristic (increasing output voltage with increasing load). This is the result of the compensation of the controller of resistive losses between the local sense voltage (TP15 and TP16) and the remote sense connection (J3). TP17 and TP18 are connected to the remote sense lines and thus will show the voltage at the load when remote sense is connected. Excessive phase shift from inductive components in the load or remote sense connections can cause instability if care is not taken to minimize these parasitic effects in the remote sense line. A twisted pair of insulated cables from the load connection to J3 is preferred to minimize noise injection and inductance in the remote sense line. In a device layout, care should be taken to shield the remote sense line from high-noise, high-current, or digital signals to limit noise injection into the feedback path and provide the most accurate regulation possible. 3.3 5V Input Operation (R10 and R15) To operate with a 5-V input, two resistors need to be changed. R10 (RKFF) sets the voltage ramp amplitude and needs to be reduced to 53.6 kΩ to lower the UVLO to 3.9 V for 5-V operation. In addition, a 330-kΩ resistor should be added at R15 to prevent an internal race condition during soft start.1 1 Due to higher duty cycles associated with higher output voltages or lower input voltages, output current should be limited to 10 A when operating with output voltages greater than 2.0 V or input voltages below 6 V to reduce conduction losses in the main switching FET (Q1). Under these conditions, a lower RdsON FET would normally be selected. SLUU231A – JUNE 2006 – REVISED JANUARY 2022 Submit Document Feedback TPS40074 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated 5 Test Setup www.ti.com 4 Test Setup 4.1 Equipment 4.1.1 Voltage Source V12V_IN The input voltage source (V12V_IN) should be a 0-V to 15-V variable DC source capable of 5 ADC. Connect V12V_IN to J1 as shown in Figure 4-2. 4.1.2 Meters A1: 0 ADC 5 ADC, ammeter V1: V12V_IN, 0-Vto 15-V voltmeter V2: V1V5_OUT 0-V to 5-V voltmeter 4.1.3 Loads LOAD1 The output load (LOAD1) should be an electronic constant current mode load capable of 0 ADC–15 ADC at 1.5 V. 4.1.4 Recommended Wire Gauge V12V_IN to J1 The connection between the source voltage, V12V_IN, and J1 of HPA095 can carry as much as 3 ADC. The minimum recommended wire size is AWG #16 with the total length of wire less than four feet (2-feet input, 2-feet return). J2 to LOAD1 (Power) The power connection between J2 of HPA095 and LOAD1 can carry as much as 15 ADC. The minimum recommended wire size is 2× AWG #16, with the total length of wire less than four feet (2-feet output, 2-feet return). J3 to LOAD1 (Remote Sense) If remote sense is used, the remote sense connection between J3 of HPA095 and LOAD1 can carry less than 1 ADC. The minimum recommended wire size is AWG #22, with the total length of wire less and four feet (2-feet output, 2-feet return). 4.1.5 Other FAN This evaluation module includes components that can get hot to the touch, because this EVM is not enclosed to allow probing of circuit nodes, a small fan capable of 200–400 lfm is required to reduce component surface temperatures to prevent user injury. The EVM should not be left unattended while powered or probed while the fan is not running. OSCILLOSCOPE A 60-MHz or faster oscilloscope can be used to determine the ripple voltage on 1V5_OUT. The oscilloscope should be set for the following to take output ripple measurements: • • • • 1-MΩ impedance AC coupling 1-μs/division horizontal resolution 20-mV/division vertical resolution TP15 and TP16 can be used to measure the output ripple voltage by placing the oscilloscope probe tip through TP15 and holding the ground barrel to TP16 as shown in Figure 4-2. For a hands-free approach, the loop in TP16 can be cut and opened to cradle the probe barrel. Using a leaded ground connection can induce additional noise due to the large ground loop area. 6 TPS40074 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated SLUU231A – JUNE 2006 – REVISED JANUARY 2022 Submit Document Feedback www.ti.com Test Setup 4.2 Equipment Setup Figure 4-2 shows the basic recommended test setup to evaluate the TPS40074EVM-001. Note that although the return for J1 and J2 are the same, the connections should remain separate as shown in Figure 4-1. 4.2.1 Procedure 1. Working at an ESD workstation, make sure that any wrist straps, bootstraps, or mats are connected referencing the user to earth ground before power is applied to the EVM. An electrostatic smock and safety glasses should also be worn. 2. Prior to connecting the DC input source, V12V_IN, it is advisable to limit the source current from V12V_IN to 5.0-A maximum. Make sure V12V_IN is initially set to 0 V and connected as shown in Section 4.2.2. 3. Connect the ammeter A1 (0-A to 5-A range) between V12V_IN and J1 as shown in Figure 4-1. 4. Connect voltmeter V1 to TP1 and TP2 as shown in Figure 4-1. 5. Connect LOAD1 to J2 as shown in Figure 3-1. Set LOAD1 to constant current mode to sink 0 ADC before V12V_IN is applied. 6. Connect voltmeter, V2 across TP17 and TP18 as shown in Figure 4-1. 7. Connect an oscilloscope probe to TP16 and TP15 as shown in Figure 4-2. 8. Place a fan as shown in Figure 4-1. Turn it on, making sure air is flowing across the EVM. 4.2.2 Diagram + V1 - V12V_IN + - Oscilloscope 1M!, AC 10mV / div 20MHz A1 - + TP1 TP2 +12V_IN TP16 J1 FAN - - + + -1V5_OUT + TP15 See Tip and Barrel Measurement for Vout ripple + LOAD1 1.5V @ 15A TP17 TP5 TP7 TP6 GND CHA CHB -+ J2 TP18 TEXAS INSTRUMENTS TPS40074EVM-001 12V to 1.5V @ 15A with Remote Sense HPA095A + V2 - Figure 4-1. TPS40074EVM-001 Recommended Test Setup SLUU231A – JUNE 2006 – REVISED JANUARY 2022 Submit Document Feedback TPS40074 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated 7 Test Setup www.ti.com Metal Ground Barrel Probe Tip TP15 TP16 Tip and Barrel Vout ripple measurement Figure 4-2. Output Ripple Measurement – Tip and Barrel using TP15 and TP16 4.3 Start-Up/Shutdown Procedure 1. 2. 3. 4. 5. Increase V12V_IN (V1) from 0 V to 10 VDC. Vary LOAD1 from 0 A–10 ADC. Vary V12V_IN (V1) from 10 VDC to 14 VDC. Decrease LOAD1 to 0 A. Decrease V12V_IN to 0 V. 4.4 Equipment Shutdown 1. 2. 3. 4. 8 Shut down the oscilloscope. Shut down LOAD1. Shut down V12V_IN. Shut down FAN. TPS40074 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated SLUU231A – JUNE 2006 – REVISED JANUARY 2022 Submit Document Feedback www.ti.com TPS40074EVM Typical Performance Data and Characteristic Curves 5 TPS40074EVM Typical Performance Data and Characteristic Curves Figure 5-1 through Figure 6-2 present typical performance curves for the TPS40074EVM-001. Since actual performance data can be affected by measurement techniques and environmental variables, these curves are presented for reference and may differ from actual field measurements. 5.1 Efficiency TPS40074EVM-001 EFFICIENCY vs LOAD CURRENT 90 10 88 12 86 14 Efficiency - % 84 82 80 78 76 V12 V_IN = 10-14 V, V1V5_OUT = 1.5 V, I1V5_OUT = 0-15 A 74 72 70 0 2 4 6 8 10 IL - Load Current - A 12 14 16 Revision Tested A Figure 5-1. TPS40074EVM-001 Efficiency V12V_IN = 10 V–14 V, V1V5_OUT = 1.5 V, I1V5_OUT = 0 A–15 A 5.2 Line and Load Regulation TPS40074EVM LINE AND LOAD REGULATION 1.525 VO - Output Voltage - V 1.52 14 1.515 12 1.51 10 1.505 1.5 1.495 0 2 4 6 8 10 IL - Load Current - A 12 14 16 Revision Tested A Figure 5-2. TPS40074EVM-001 Line and Load Regulation – ±1% Window SLUU231A – JUNE 2006 – REVISED JANUARY 2022 Submit Document Feedback TPS40074 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated 9 EVM Assembly Drawings and Layout www.ti.com 6 EVM Assembly Drawings and Layout Figure 6-1 through Figure 6-6 show the design of the TPS40074EVM-001 printed circuit board. The EVM has been designed using a 4-layer, 2-oz copper-clad circuit board 3.0 inch × 3.0 inch with all components on the top side to allow the user to easily view, probe, and evaluate the TPS40074 control IC in a practical application. Moving components to both sides of the PCB or using additional internal layers can offer additional size reduction for space constrained systems. Figure 6-1. TPS40074EVM-001 Component Placement (Viewed from Top) Figure 6-2. TPS40074EVM-001 Silkscreen (Viewed from Top) 10 TPS40074 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated SLUU231A – JUNE 2006 – REVISED JANUARY 2022 Submit Document Feedback www.ti.com EVM Assembly Drawings and Layout Figure 6-3. TPS40074EVM-001 Top Copper (Viewed from Top) Figure 6-4. TPS40074EVM-001 Layer 2 (X-Ray View from Top) SLUU231A – JUNE 2006 – REVISED JANUARY 2022 Submit Document Feedback TPS40074 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated 11 EVM Assembly Drawings and Layout www.ti.com Figure 6-5. TPS40074EVM-001 Layer 3 (X-Ray View from Top) Figure 6-6. TPS40074EVM-001 Bottom Copper (X-Ray View from Top) 12 TPS40074 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated SLUU231A – JUNE 2006 – REVISED JANUARY 2022 Submit Document Feedback www.ti.com List of Materials 7 List of Materials Table 7-1 lists the EVM components as configured according to the schematic shown in Figure 3-1 and Figure 4-1. Table 7-1. TPS40074EVM-001 Bill of Materials Count RefDes Description Size Mfr Part Number 0 C1, C6 Capacitor, 470 μF, 16 V, 21 mΩ, 25% 8mm Panasonic EEUFL1C470U 1 C3 Capacitor, 470 μF, 16 V, 21 mΩ, 25% 8mm Panasonic EEUFL1C470U 1 C2 Capacitor, ceramic, 4700 pF, 50 V, X7R, 10% 0603 Std Std 1 C4 Capacitor, ceramic, 150 pF, 50 V, X7R, 10% 0603 Std Std 1 C5 Capacitor, ceramic, 6800 pF, 50 V, X7R, 10% 0603 Std Std 1 C7 Capacitor, ceramic, 0.047 μF, 50 V, X7R, 10% 0603 Std Std 1 C8 Capacitor, ceramic, 1.5 μF, 16 V, X7R, 20% 0805 TDK C2012X7R1C115M 2 C9, C10 Capacitor, ceramic, 0.1 μF, 50 V, X7R, 20% 0603 Std Std 1 C11 Capacitor, ceramic, 22 pF, 50 V, NPO, 10% 0603 Std Std 1 C12 Capacitor, ceramic, 10 μF, 16 V, X7R, 20% 1206 TDK C3216X7R1C106M 2 C13, C16 Capacitor, ceramic, 2.2 μF, 16 V, X7R, 10% 1206 Std Std 0 C14 Capacitor, ceramic, 2.2 μF, 16 V, X7R, 10% 1206 Std Std 0 C15 Capacitor, ceramic, 1000 pF, 25 V, X7R, 20% 0805 Std Std 2 C17, C18 Capacitor, 1000 μF, 10 V, 16 mΩ, 25% 8mm Panasonic EEUFL1A102U 1 C19 Capacitor, Ceramic, 10 μF, 6.3 V, X5R, 20% 1206 Std Std 1 D1 Diode, Schottky, 200 mA, 30 V SOD323 On-Semi BAT54HT1 1 J1 Terminal Block, 2-pin, 15 A, 5,1 mm 0.40 × 0.35 OST ED1609 1 J2 Terminal Block, 4-pin, 15 A, 5,1 mm 0.80 × 0.35 OST ED2227 1 J3 Terminal Block, 2-pin, 6 A, 3,5 mm 0.27 × 0.25 OST ED1514A 1 L1 Inductor, SMT, 1.3 μH, 26 A, 2 mΩ 0.51 × 0.51 Pulse PG0077.142 1 Q1 Mosfet, N-Ch, 25 V, 81.4 A, 8.9 mΩ LFPAK Philips PH6325L 1 Q2 Mosfet, N-Ch, 25 V, 118 A, 4.1 mΩ LFPAK Philips PH2625L 1 R1 Resistor, Chip, 0-Ω jumper, 1/10-W, 5% 0805 Std Std 1 R2 Resistor, Chip, 680 Ω, 1/16-W, 1% 0603 Std Std 2 R3,R9 Resistor, Chip, 10 kΩ, 1/16-W, 1% 0603 Std Std 1 R4 Resistor, Chip, 6.20 kΩ, 1/16-W, 1% 0603 Std Std 1 R5 Resistor, Chip, 105 kΩ, 1/16-W, 1% 0603 Std Std 1 R6 Resistor, Chip, 9.53 kΩ, 1/16-W, 1% 0603 Std Std 1 R7 Resistor, Chip, 49.9 Ω, 1/16-W, 1% 0603 Std Std 1 R8 Resistor, Chip, 118 kΩ, 1/16-W, 1% 0603 Std Std 1 R10 Resistor, Chip, 133 kΩ, 1/16-W, 1% 0603 Std Std 1 R11 Resistor, Chip, 1.13 kΩ, 1/16-W, 1% 0603 Std Std 0 R12 Resistor, Chip, 3.3 Ω, 1/10-W, 1% 0805 Std Std 2 R13, R14 Resistor, Chip, 10 Ω, 1/16-W, 1% 0603 Std Std 0 R15 Resistor, Chip, Ω, 1/16-W, 1% 0603 N/A N/A 1 R16 Resistor, Chip, 1.0 Ω, 1/16-W, 1% 0603 Std Std 3 TP1, TP15, TP17 Test Point, Red, Thru Hole 0.125 × 0.125 Keystone 5010 8 TP2–TP5, TP10, TP14, TP16, TP18 Test Point, Black, Thru Hole 0.125 × 0.125 Keystone 5011 7 TP6–TP9, TP11–TP13 Test Point, White, Thru Hole 0.125 × 0.125 Keystone 5012 1 U1* IC QFN-20 TI TPS40074RHL 1 — PCB, 4-Layer FR4, 3.0 inch × 3.0 inch × 0.062 inch 2.4 inch × 2.1 inch Any HPA095A 4 — Bumpon, Transparent 0.44 inch × 0.2 inch 3M SJ5303 Notes: 1. These assemblies are ESD sensitive, ESD precautions shall be observed. 2. These assemblies must be clean and free from flux and all contaminants. Use of no clean flux is not acceptable. 3. These assemblies must comply with workmanship standards IPC-A-610 Class 2. SLUU231A – JUNE 2006 – REVISED JANUARY 2022 Submit Document Feedback TPS40074 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated 13 Revision History www.ti.com Table 7-1. TPS40074EVM-001 Bill of Materials (continued) Count RefDes Description Size Mfr Part Number 4. Install Bumpons on back side(unpopulated side) of PCB. Install one in each corner after cleaning. 5. Ref designators marked with an * cannot be substituted. All other components can be substituted with equivalent components of MFG. 8 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision * (June 2006) to Revision A (January 2022) Page • Updated the numbering format for tables, figures, and cross-references throughout the document. ................2 • Updated the user's guide title............................................................................................................................. 2 14 TPS40074 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated SLUU231A – JUNE 2006 – REVISED JANUARY 2022 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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