Using the TPS53313EVM-078 User's Guide Literature Number: SLUU819 December 2011
User's Guide SLUU819 – December 2011 6-A Step-Down Regulator with Integrated Switcher 1 Introduction The TPS53313EVM-078 evaluation module (EVM) is a step-down regulator featuring the TPS53313. The TPS53313 is a fully integrated step-down regulator employing voltage mode control. 2 Description The TPS53313EVM-078 is designed to use a 12-V voltage rail to produce a regulated 1.2-V output with up to 6-A load current.
Electrical Performance Specifications www.ti.com 3 Electrical Performance Specifications Table 1. TPS53313EVM-078 Electrical Performance Specifications (1) PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Input Characteristic Voltage range VIN Maximum input current VIN = 12 V 8.0 0.8 12 No load input current VIN = 12 V, IOUT = 0 A, fSW = 600 kHz under skip mode 8.0 14 V A mA Output Characteristics Output voltage Output voltage regulation Output voltage ripple 1.
VIN GND 8V - 14V J2 6-A Step-Down Regulator with Integrated Switcher Copyright © 2011, Texas Instruments Incorporated Notes: VOUT 1.2V/6A GND TP6 GND 2 1 VIN TP3 J5 C1 1 1 22uF C10 C2 22uF C11 GND 22uF Not Populated TP10 VOUT 2 GND TP8 1.0uF C3 22uF C12 22uF C4 22uF C13 22uF 22uF C14 6 GND SW TP9 PGND PGND PGND PGND PGND PGND PWPD GND TP14 L1 1.0uH 12 11 10 9 8 7 25 5 R1 U1 1.0nF C18 1.00 R17 C15 0.
Test Setup www.ti.com 5 Test Setup 5.1 Test Equipment Voltage Source (VIN): The input voltage source, (VIN), should be a 0-V to 15-V variable DC source capable of supplying 2 ADC. Connect VIN to J2 as shown in Figure 3. Multimeters: • V1: VIN at TP3 (VIN) and TP6 (GND), 0-V to 15-V voltmeter • V2: VOUT at TP10 (VOUT) and TP8 (GND) • A1: VIN input current, 0-ADC to 2-ADC Ammeter Output Load: The output load should be an electronic constant resistance mode load capable of 0-ADC to 6-ADC at 1.2 V.
Test Setup 5.2 www.ti.com Recommended Test Setup Figure 3 is the recommended test set up to evaluate the TPS53313EVM-078. 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. Figure 3. TPS53313EVM-078 Recommended Test Set Up 5.2.1 Input Connections Prior to connecting the DC input source (VIN), it is advisable to limit the source current from VIN to 2 A maximum.
Configurations www.ti.com 6 Configurations All Jumper selections should be made prior to applying power to the EVM. User can configure this EVM per following configurations. 6.1 Mode and Soft-Start Time Selection The operation mode and soft-start time can be set by J4. 6.1.1 Default setting: Skip Mode, 6-ms SS Table 2. MODE Selection 6.2 MODE RESISTANCES OPERATION MODE SOFT-START TIME 10.0 kΩ FCCM 6 ms 20.0 kΩ FCCM 3 ms 39.0 kΩ FCCM 1 ms 82.
Test Procedure www.ti.com 7 Test Procedure 7.1 Line/Load Regulation and Efficiency Measurement Procedure 1. Set up EVM as described in Section 5 and Figure 3. 2. Ensure Load is set to constant resistance mode and to sink 0 ADC. 3. Ensure all jumpers set per Section 6. 4. Increase VIN from 0 V to 12 V. Using V1 to measure VIN voltage. 5. Open jumper J1 to enable the controller. 6. Use V2 to measure VOUT voltage, A1 to measure VIN current. 7.
Test Procedure www.ti.com 7.3 List of Test Points Table 5. Test Point Functions 7.4 TEST POINTS NAME TP1 EN DESCRIPTION TP2 GND GND TP3 VIN Input voltage TP4 PG Power good output TP5 SYNC Input of external clock for synchronization TP6 GND GND TP7 GND GND TP8 GND GND Enable pin TP9 SW Switching node TP10 VOUT Output voltage TP11 CHB Input B for loop injection TP12 CHA Input A for loop injection TP13 GND GND TP14 GND GND Equipment Shutdown 1. Shut down VIN 2.
Performance Data and Typical Characteristic Curves 8 www.ti.com Performance Data and Typical Characteristic Curves Figure 4 through Figure 20 present typical performance curves for TPS53313EVM-078. 8.1 Efficiency 90 85 H - Efficiency - % 80 75 70 65 60 VIN = 12 V, fsw = 600 kHz, Skip Mode 55 VIN = 12 V, fsw = 1.00 MHz, Skip Mode 50 VIN = 12 V, fsw = 600 kHz, FCCM Mode VIN = 12 V, fsw = 1.00 MHz, FCCM Mode 45 40 0 1 2 3 4 5 6 ILOAD - Load Current - A Figure 4. Efficiency 8.
Performance Data and Typical Characteristic Curves www.ti.com 8.3 Line Regulation 1.22 Skip Mode, fsw = 600 kHz, IOUT = 6 A VOUT - Output Voltage - V 1.215 Skip Mode, fsw = 1.00 MHz, IOUT = 6 A 1.21 FCCM Mode, fsw = 600 kHz, IOUT = 6 A FCCM Mode, fsw = 1.00 MHz, IOUT = 6 A 1.205 1.2 1.195 1.19 1.185 1.18 8 9 10 11 12 13 14 VIN - Input Voltage - V Figure 6.
Performance Data and Typical Characteristic Curves 8.4 www.ti.com Output Transient Figure 7. Output Load 0-A to 3-A Transient Under FCCM Mode (12-V VIN, 1.2-V VOUT, fSW = 600 kHz) Figure 8. Output Load 0-A to 3-A Transient Under Skip Mode (12-V VIN, 1.
www.ti.com 8.5 Performance Data and Typical Characteristic Curves Output Ripple Figure 9. Output Ripple at No Load (12-V VIN, 1.2-V VOUT, 0-A, Skip Mode, fSW = 600 kHz) Figure 10. Output Ripple at Full Load (12-V VIN, 1.
Performance Data and Typical Characteristic Curves 8.6 www.ti.com Switching Node Figure 11. Switching Node at No Load (12-V VIN, 1.0-V VOUT, 0-A, Skip Mode, fSW = 600 kHz) Figure 12. Switching Node at Full Load (12-V VIN, 1.
www.ti.com 8.7 Performance Data and Typical Characteristic Curves Start Up Figure 13. Start-Up Waveform (12-V VIN, 1.2-V VOUT, 6-A IOUT, 1-ms SS) Figure 14. Pre-bias Start-Up Waveform (12-V VIN, 1.
Performance Data and Typical Characteristic Curves 8.8 www.ti.com Shut Down Figure 15. Shut-Down Waveform (12-V VIN, 1.2-V VOUT, 0-A IOUT) 8.9 Over-Current Protection Figure 16. Over-Current Protection Waveform ( 12-V VIN, 1.2-V VOUT, IOUT increases from 6 A to 7.
Performance Data and Typical Characteristic Curves www.ti.com 8.10 Synchronization Figure 17. Synchronization Waveform (12-V VIN, 1.2-V VOUT, 0-A IOUT, free-running frequency = 600 kHz, SYNC frequency = 750 kHz) 8.11 Bode Plot Figure 18. Loop Gain (12-V VIN, 1.
Performance Data and Typical Characteristic Curves www.ti.com 8.12 Thermal Image Figure 19. Thermal Image (12-V VIN, 1.2-V VOUT, 6-A IOUT, FCCM Mode, fSW = 600 kHz) Figure 20. Thermal Image (12-V VIN, 1.2-V VOUT, 6-A IOUT, FCCM Mode, fSW = 1.
EVM Assembly Drawing and PCB Layout www.ti.com 9 EVM Assembly Drawing and PCB Layout The following figures (Figure 21 through Figure 26) show the design of the TPS53313EVM-078 printed circuit board. The EVM has been designed using 4 Layers, 2-oz copper circuit board. Figure 21. TPS53313EVM-078 Top Layer Assembly Drawing (top view) Figure 22.
EVM Assembly Drawing and PCB Layout www.ti.com Figure 23. TPS53313EVM-078 Top Copper (top view) Figure 24.
EVM Assembly Drawing and PCB Layout www.ti.com Figure 25. TPS53313EVM-078 Layer 3 (top view) Figure 26.
List of Materials 10 www.ti.com List of Materials The EVM components list according to the schematic shown in Figure 1 Table 6. TPS53313EVM-078 List of Materials QTY 22 REF DES DESCRIPTION PART NUMBER MFR 3 C1, C8, C9 Capacitor, ceramic, 16 V, X7R, 10%, 1.
List of Materials www.ti.com Table 6. TPS53313EVM-078 List of Materials (continued) QTY REF DES DESCRIPTION PART NUMBER MFR 1 R11 Resistor, chip, 1/16 W, 1%, 39.0 kΩ, 0603 Std Std 1 R12 Resistor, chip, 1/16 W, 1%, 82.0 kΩ, 0603 Std Std 1 R13 Resistor, chip, 1/16 W, 1%, 160 kΩ, 0603 Std Std 2 R14, R18 Resistor, chip, 1/16 W, 1%, 0 Ω, 0603 Std Std 0 R15 Resistor, chip, 1/16 W, 1%, 0603 Std Std 1 R16 Resistor, chip, 1/16 W, 1%, 10.
Evaluation Board/Kit Important Notice Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards.
EVALUATION BOARD/KIT/MODULE (EVM) ADDITIONAL TERMS Texas Instruments (TI) provides the enclosed Evaluation Board/Kit/Module (EVM) under the following conditions: The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims arising from the handling or use of the goods.
FCC Interference Statement for Class B EVM devices This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
【Important Notice for Users of this Product in Japan】 】 This development kit is NOT certified as Confirming to Technical Regulations of Radio Law of Japan If you use this product in Japan, you are required by Radio Law of Japan to follow the instructions below with respect to this product: 1. 2. 3. Use this product in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal Affairs and Communications on March 28, 2006, based on Sub-section 1.
EVALUATION BOARD/KIT/MODULE (EVM) WARNINGS, RESTRICTIONS AND DISCLAIMERS For Feasibility Evaluation Only, in Laboratory/Development Environments. Unless otherwise indicated, this EVM is not a finished electrical equipment and not intended for consumer use.
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.
