Using the TPS53317EVM-750 User's Guide Literature Number: SLUU642 September 2011
User's Guide SLUU642 – September 2011 TPS53317EVM-750 D-CAP+™ Mode Synchronous Step-Down Integrated FETs Converter 1 Introduction The TPS53317EVM-750 evaluation module (EVM) is a synchronous buck regulator featuring TPS53317. The TPS53317 is a fully integrated synchronous buck regulator employing D-CAP+™ technology. 2 Description The TPS53317EVM-750 is designed to use a 1.5-V voltage rail to produce a regulated 0.75-V or use a 1.35-V voltage rail to produce a regulated 0.
Electrical Performance Specifications www.ti.com 3 Electrical Performance Specifications Table 1. TPS53317EVM-750 Electrical Performance Specifications (1) PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Input Characteristics Voltage range VIN Maximum input current VIN = 1.5 V, IOUT = 6 A 1.4 1.5 4 No load input current VIN = 1.5 V, IOUT = 0 A under skip mode, fSW = 600 kHz 1 1.6 V A mA Output Characteristics Output voltage 0.75 Setpoint accuracy (VIN = 1.
Schematic Schematic + 1 2 3 4 www.ti.com Figure 1.
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 5-V variable DC source capable of supplying 10 ADC. Connect VIN to J1 as shown in Figure 3. • V5IN: The V5IN voltage source should be a 5-V DC source capable of supplying 1 ADC. Connect V5IN to J3 as shown in Figure 3.
Test Setup 5.2 www.ti.com Recommended Test Setup Figure 3 is the recommended test set up to evaluate the TPS53317EVM-750. 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. FAN V3 VV5IN - + + A2 - + - LOAD 0.75V @ 6A V2 + VVIN + V1 + A1 TEXAS I NSTRUMENTS Figure 3. TPS53317EVM-750 Recommended Test Set Up Input Connections: 1.
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 Selection The MODE can be set by J4. 6.1.1 Default setting: MODE1 Table 2. MODE Selection SWITCHING FREQUENCY (kHz) OVERCURRENT LIMIT (OCL) VALLEY (A) 600 7.6 600 5.4 22 1000 5.4 4 33 1000 7.6 5th (9-10 pin shorted) 5 47 600 7.6 6th (11-12 pin shorted) 6 68 600 5.
Test Procedure 6.3 www.ti.com External Tracking Selection The external tracking can be configured by J5. If jumper J5 is shorted, the internal 2-V VREF voltage is used to set the target output voltage to be 0.75 V. If jumper J5 is open, the external reference between 1.2 V to 4.0 V can be applied to J7. The output voltage will be regulated to ½ of the external reference voltage. For example, applying 1.35 V to J7, the output voltage is 0.675 V. 6.3.1 Default setting: No External Tracking Table 4.
Test Procedure www.ti.com 7.2 Control Loop Gain and Phase Measurement Procedure TPS53317EVM-750 contains a 10-Ω series resistor in the feedback loop for loop response analysis. 1. Set up EVM as described in Figure 3. 2. Connect isolation transformer to test points marked TP12 and TP13. 3. Connect input signal amplitude measurement probe (channel A) to TP12. Connect output signal amplitude measurement probe (channel B) to TP13. 4. Connect ground lead of channel A and channel B to TP14. 5.
Performance Data and Typical Characteristic Curves 8 www.ti.com Performance Data and Typical Characteristic Curves Figure 4 through Figure 16 present typical performance curves for TPS53317EVM-750. 8.1 Efficiency Figure 4. Efficiency 8.2 Load Regulation Figure 5.
www.ti.com 8.3 Performance Data and Typical Characteristic Curves Output Transient Figure 6. Output Load 0-A to 3-A Transient (1.5-V VIN, 0.75-V VOUT, PWM mode, fSW = 1 MHz) Figure 7. Output Load 0-A to 3-A Transient with Droop (1.5-V VIN, 0.
Performance Data and Typical Characteristic Curves 8.4 www.ti.com Output Ripple Figure 8. Output Ripple (1.5-V VIN, 0.75-V VOUT, 3-A IOUT, fSW = 600 kHz) Figure 9. Output Ripple (1.5-V VIN, 0.
www.ti.com 8.5 Performance Data and Typical Characteristic Curves Switching Node Figure 10. Switching Node (1.5-V VIN, 0.75-V VOUT, 3-A IOUT, fSW = 600 kHz) Figure 11. Switching Node (1.5-V VIN, 0.
Performance Data and Typical Characteristic Curves 8.6 www.ti.com Enable Turn On / Turn Off Figure 12. Turn-On Waveform (1.5-V VIN, 0.75-V VOUT, 3-A IOUT) Figure 13. Turn-Off Waveform (1.5-V VIN, 0.
Performance Data and Typical Characteristic Curves www.ti.com 8.7 Pre-bias Turn-On Figure 14. Pre-bias Turn-On Waveform (1.5-V VIN, 0.75-V VOUT, 0-A IOUT, 0.5-V pre-bias) 8.8 Bode Plot Figure 15. Loop Gain (1.5-V VIN, 0.
Performance Data and Typical Characteristic Curves 8.9 www.ti.com Thermal Image Figure 16. Thermal Image (1.5-V VIN, 0.
EVM Assembly Drawing and PCB Layout www.ti.com 9 EVM Assembly Drawing and PCB Layout The following figures (Figure 17 through Figure 22) show the design of the TPS53317EVM-750 printed circuit board. The EVM has been designed using 4-Layers, 2-oz copper circuit board. TEXAS I NSTRUMENTS Figure 17. TPS53317EVM-750 Top Layer Assembly Drawing (top view) Figure 18.
EVM Assembly Drawing and PCB Layout www.ti.com Figure 19. TPS53317EVM-750 Top Copper (top view) Figure 20.
EVM Assembly Drawing and PCB Layout www.ti.com Figure 21. TPS53317EVM-750 Layer 3 (top view) Figure 22.
List of Materials 10 www.ti.com List of Materials The EVM components list according to the schematic Shown in Figure 1 Table 7. TPS53317EVM-750 List of Materials QTY 20 REF DES DESCRIPTION PART NUMBER MFR 5 C1, C2, C13, C14, C15 Capacitor, ceramic, 16 V, x5R, 10%, 10 µF, 0805 Std Std 1 C16 Capacitor, OS CON, 10 V, 17 milliohm, 20%, 330uF, 0.315 inch 10SEP330M Sanyo 1 C3 Capacitor, ceramic, 16 V, x7R, 20%, 1.0 µF, 0603 Std Std 1 C35 Capacitor, ceramic, 16 V, x5R, 20%, 2.
List of Materials www.ti.com Table 7. TPS53317EVM-750 List of Materials (continued) QTY REF DES DESCRIPTION PART NUMBER MFR 1 S1 Switch, ON-ON mini toggle, 0.28 inch x 0.18 inch G12AP-RO NKK 1 TP1 Test point, 0.062 hole, VIN, 0.250 inch 5010 Keystone 2 TP10, TP14 Test point, 0.062 hole, AGND, 0.250 inch 5011 Keystone 1 TP11 Test point, 0.062 hole, VREF, 0.250 inch 5010 Keystone 1 TP12 Test point, 0.062 hole, CHA, 0.250 inch 5012 Keystone 1 TP13 Test point, 0.
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.
