TPS54334EVM-722

www.ti.com Table of Contents User’s Guide TPS54334 Step-Down Converter Evaluation Module User's Guide ABSTRACT This user's guide contains background information for the TPS54334 as well as support documentation for the TPS54334EVM-722 evaluation module (PWR722-001). The user's guide also includes performance specifications, the schematic, and the bill of materials for the TPS54334EVM-722. Table of Contents 1 Introduction.............................................................................................................................................................................3 1.1 Background........................................................................................................................................................................ 3 1.2 Performance Specification Summary.................................................................................................................................3 1.3 Modifications...................................................................................................................................................................... 4 2 Test Setup and Results.......................................................................................................................................................... 5 2.1 Input/Output Connections.................................................................................................................................................. 5 2.2 Efficiency............................................................................................................................................................................6 2.3 Output Voltage Load Regulation........................................................................................................................................ 7 2.4 Output Voltage Line Regulation......................................................................................................................................... 7 2.5 Load Transients..................................................................................................................................................................8 2.6 Loop Characteristics.......................................................................................................................................................... 8 2.7 Output Voltage Ripple........................................................................................................................................................ 9 2.8 Input Voltage Ripple......................................................................................................................................................... 10 2.9 Powering Up.....................................................................................................................................................................11 2.10 Powering Down.............................................................................................................................................................. 12 3 Board Layout.........................................................................................................................................................................13 3.1 Layout.............................................................................................................................................................................. 13 4 Schematic and Bill of Materials...........................................................................................................................................15 4.1 Schematic........................................................................................................................................................................ 16 4.2 Bill of Materials.................................................................................................................................................................17 5 Revision History................................................................................................................................................................... 18 List of Figures Figure 2-1. TPS54334EVM-722 Efficiency.................................................................................................................................. 6 Figure 2-2. TPS54334EVM-722 Low Current Efficiency..............................................................................................................6 Figure 2-3. TPS54334EVM-722 Load Regulation....................................................................................................................... 7 Figure 2-4. TPS54334EVM-722 Line Regulation........................................................................................................................ 7 Figure 2-5. TPS54334EVM-722 Transient Response................................................................................................................. 8 Figure 2-6. TPS54334EVM-722 Loop Response........................................................................................................................ 8 Figure 2-7. TPS54334EVM-722 Output Ripple, IOUT = 3 A......................................................................................................... 9 Figure 2-8. TPS54334EVM-722 Output Ripple, IOUT = 200 mA.................................................................................................. 9 Figure 2-9. TPS54334EVM-722 Output Ripple, IOUT = 0 A......................................................................................................... 9 Figure 2-10. TPS54334EVM-722 Input Ripple.......................................................................................................................... 10 Figure 2-11. TPS54334EVM-722 Startup Relative to VIN ......................................................................................................... 11 Figure 2-12. TPS54334EVM-722 Startup Relative to Enable.................................................................................................... 11 Figure 2-13. TPS54334EVM-722 Shutdown Relative to VIN .................................................................................................... 12 Figure 2-14. TPS54334EVM-722 Shutdown Relative to EN..................................................................................................... 12 Figure 3-1. TPS54334EVM-722 Top-Side Assembly.................................................................................................................13 Figure 3-2. TPS54334EVM-722 Top-Side Layout 3.................................................................................................................. 14 Figure 3-3. TPS54334EVM-722 Bottom-Side Layout................................................................................................................14 Figure 4-1. TPS54334EVM-722 Schematic...............................................................................................................................16 SLVUAH4A – AUGUST 2015 – REVISED OCTOBER 2021 TPS54334 Step-Down Converter Evaluation Module User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated 1 Trademarks www.ti.com List of Tables Table 1-1. Input Voltage and Output Current Summary...............................................................................................................3 Table 1-2. TPS54334EVM-722 Performance Specification Summary.........................................................................................3 Table 1-3. Output Voltages Available...........................................................................................................................................4 Table 2-1. EVM Connectors and Test Points............................................................................................................................... 5 Table 4-1. TPS54334EVM-722 Bill of Materials.........................................................................................................................17 Trademarks All trademarks are the property of their respective owners. 2 TPS54334 Step-Down Converter Evaluation Module User's Guide SLVUAH4A – AUGUST 2015 – REVISED OCTOBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated www.ti.com Introduction 1 Introduction This user's guide contains background information for the TPS54334 as well as support documentation for the TPS54334EVM-722 evaluation module (PWR722-001). Also included are the performance specifications, the schematic, and the bill of materials for the TPS54334EVM-722. 1.1 Background The TPS54334 dc/dc converter is designed to provide up to a 3-A output from an input voltage source of 4.2 V to 28 V. 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 TPS54334 regulator. The switching frequency is externally set at a nominal 570 kHz. The high-side and low-side MOSFETs are incorporated inside the TPS54334 package along with the gate-drive circuitry. The low drain-to-source on resistance of the MOSFETs allow the TPS54334 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 TPS54334 provides an adjustable undervoltage lockout input. The absolute maximum input voltage is 30 V for the TPS54334EVM-722. Table 1-1. Input Voltage and Output Current Summary EVM INPUT VOLTAGE RANGE OUTPUT CURRENT RANGE TPS54334EVM-722 VIN = 4.2 V to 28 V 0 A to 3 A 1.2 Performance Specification Summary A summary of the TPS54334EVM-722 performance specifications is provided in Table 1-2. Specifications are given for an input voltage of VIN = 24 V and an output voltage of 5.0 V, unless otherwise specified. The TPS54334EVM-722 is designed and tested for VIN = 4.2 V to 28 V. The ambient temperature is 25°C for all measurements, unless otherwise noted. Table 1-2. TPS54334EVM-722 Performance Specification Summary Specification Test Conditions VIN operating voltage range MIN 4.2 TYP MAX 24 28 Unit V VIN start voltage 4.1 V VIN stop voltage 3.9 V Output voltage set point 3.3 V Output current range(1) VIN = 4.2 V to 28 V 0 Line regulation IO = 1.5 A, VIN = 4.2 V to 28 V Load regulation VIN = 12 V, IO = 0 A to 3 A IO = 0.75 A to 2.25 A Load transient response IO = 2.25 A to 0.75 A 3 A ±0.05% ±0.2% Voltage change –190 Recovery time 150 μs Voltage change 190 mV Recovery time mV 150 VIN = 24 V, IO = 1.5 A Phase margin VIN = 24 V , IO = 1.5 A 82 ° Input ripple voltage IO = 3 A 400 mVPP Output ripple voltage IO = 3 A