TPS560200EVM-537

User's Guide SLVU954 – September 2013 TPS560200EVM-537 0.5-A, Single Channel Regulator Evaluation Module This user's guide contains information for the TPS560200 as well as support documentation for the TPS560200EVM-537 evaluation module. Included are the performance specifications, schematic, and the bill of materials of the TPS560200EVM-537. 1 2 3 4 5 6 Contents Introduction .................................................................................................................. 2 Performance Specification Summary ..................................................................................... 2 Modifications ................................................................................................................. 3 3.1 Output Voltage Setpoint ........................................................................................... 3 Test Setup and Results .................................................................................................... 4 4.1 Input/Output Connections ......................................................................................... 4 4.2 Start-Up Procedure ................................................................................................ 4 4.3 Efficiency ............................................................................................................ 5 4.4 Load Regulation .................................................................................................... 6 4.5 Line Regulation ..................................................................................................... 6 4.6 Load Transient Response ........................................................................................ 7 4.7 Output Voltage Ripple ............................................................................................. 8 4.8 Input Voltage Ripple ............................................................................................... 9 4.9 Start-Up ............................................................................................................ 10 4.10 Shut-Down ......................................................................................................... 11 Board Layout ............................................................................................................... 12 5.1 Layout .............................................................................................................. 12 Schematic, Bill of Materials, and Reference ........................................................................... 15 6.1 Schematic ......................................................................................................... 15 6.2 Bill of Materials .................................................................................................... 16 6.3 Reference .......................................................................................................... 16 List of Figures 1 TPS560200EVM-537 Efficiency ........................................................................................... 5 2 TPS560200EVM-537 Light Load Efficiency ............................................................................. 5 3 TPS560200EVM-537 Load Regulation .................................................................................. ................................................................................... TPS560200EVM-537 Load Transient Response, 25% to 75% Load Step .......................................... TPS560200EVM-537 Load Transient Response, No Load to 50% Load Step ..................................... TPS560200EVM-537 Output Voltage Ripple, IOUT = 0.5 A ............................................................. TPS560200EVM-537 Output Voltage Ripple, IOUT = 30 mA ........................................................... TPS560200EVM-537 Output Voltage Ripple, IOUT = 0 A ............................................................... TPS560200EVM-537 Input Voltage Ripple, IOUT = 0.5 A ............................................................... TPS560200EVM-537 Start-Up Relative to VIN ......................................................................... TPS560200EVM-537 Start-Up Relative to EN ........................................................................ TPS560200EVM-537 Shut-Down Relative to VIN ...................................................................... TPS560200EVM-537 Shut-Down Relative to EN ..................................................................... 6 4 TPS560200EVM-537 Line Regulation 6 5 6 7 8 9 10 11 12 13 14 7 7 8 8 9 9 10 10 11 11 D-CAP2, SWIFT, Eco-mode are trademarks of Texas Instruments. SLVU954 – September 2013 Submit Documentation Feedback TPS560200EVM-537 0.5-A, Single Channel Regulator Evaluation Module Copyright © 2013, Texas Instruments Incorporated 1 Introduction www.ti.com 15 Top Assembly .............................................................................................................. 16 Top Layer ................................................................................................................... 13 17 Bottom Layer ............................................................................................................... 14 18 TPS560200EVM-537Schematic Diagram .............................................................................. 15 12 List of Tables 1 1 Input Voltage and Output Current Summary ............................................................................ 2 2 TPS560200EVM-537Performance Specifications Summary .......................................................... 2 3 Output Voltages ............................................................................................................. 3 4 Connection and Test Points ............................................................................................... 4 5 Bill of Materials............................................................................................................. 16 Introduction The TPS560200 is a single, adaptive on-time, D-CAP2™-mode, synchronous buck converter requiring a very low external component count. The D-CAP2 control circuit is optimized for low-ESR output capacitors such as POSCAP, SP-CAP, or ceramic types and features fast transient response with no external compensation. The switching frequency is internally set at a nominal 600 kHz. The high-side and low-side switching MOSFETs are incorporated inside the TPS560200 package along with the gate-drive circuitry. The low drain-to-source on resistance of the MOSFETs allows the TPS560200 to achieve high efficiencies and helps keep the junction temperature low at high output currents. The TPS560200 dc/dc synchronous converter is designed to provide up to a 0.5-A output from an input voltage source of 4.5 V to 17 V. The output voltage range is from 0.8 V to 5.5 V. Rated input voltage and output current ranges for the evaluation module are given in Table 1. The TPS560200EVM-537 evaluation module (EVM) is a single, synchronous buck converter providing 1.05 V at 0.5 A from 4.5-V to 17-V input. This user’s guide describes the TPS560200EVM-537 performance. Table 1. Input Voltage and Output Current Summary 2 EVM Input Voltage Range Output Current Range TPS560200EVM-537 VIN = 4.5 V to 17 V 0 A to 0.5 A Performance Specification Summary A summary of the TPS560200EVM-537 performance specifications is provided in Table 2. Specifications are given for an input voltage of VIN = 12 V and an output voltage of 1.05 V, unless otherwise noted. The ambient temperature is 25°C for all measurement, unless otherwise noted. Table 2. TPS560200EVM-537Performance Specifications Summary Specifications Test Conditions Input voltage range (VIN) Min Typ Max 4.5 12 17 Output voltage Operating frequency CH1 2 1.05 VIN = 12 V, IO = 0.5 A Output current range Over current limit VIN = 12 V, LO = 10 µH Output ripple voltage VIN = 12 V, IO = 0.5 A TPS560200EVM-537 0.5-A, Single Channel Regulator Evaluation Module Copyright © 2013, Texas Instruments Incorporated kHz 0.5 0.55 V V 600 0 Unit A A 10 mVPP SLVU954 – September 2013 Submit Documentation Feedback Modifications www.ti.com 3 Modifications These evaluation modules are designed to provide access to the features of the TPS560200. Some modifications can be made to this module. 3.1 Output Voltage Setpoint To change the output voltage of the EVMs, it is necessary to change the value of resistor R1. Changing the value of R1 can change the output voltage above 0.765 V. The value of R1 for a specific output voltage can be calculated using Equation 1. R1´ 0.8 V R2 = VOUT -0.8V (1) Table 3 lists the R1 values for some common output voltages. For higher output voltages of 1.8 V or above, a feedforward capacitor (C3) may be required to improve phase margin. Pads for this component (C3) are provided on the printed-circuit board. Note that the values given in Table 3 are standard values and not the exact value calculated using Table 3. Table 3. Output Voltages R1 (kΩ) R2 (kΩ) 1.0 6.19 20.0 10 10 + 10 1.05 6.19 20.0 10 10 + 10 1.2 10.0 20.0 10 10 + 10 1.5 17.4 20.0 10 10 + 10 1.8 24.9 20.0 optional 10 10 + 10 2.5 42.2 20.0 optional 10 10 + 10 3.3 61.9 20.0 optional 10 10 + 10 5.0 105 20.0 optional 10 10 + 10 SLVU954 – September 2013 Submit Documentation Feedback C3 (pF) L1 (µH) Output Voltage (V) Min Typ Max C4 + C5 (µF) TPS560200EVM-537 0.5-A, Single Channel Regulator Evaluation Module Copyright © 2013, Texas Instruments Incorporated 3 Test Setup and Results 4 www.ti.com Test Setup and Results This section describes how to properly connect, set up, and use the TPS560200EVM-537. The section also includes test results typical for the evaluation modules and efficiency, output load regulation, output line regulation, load transient response, output voltage ripple, input voltage ripple, start-up, and switching frequency. 4.1 Input/Output Connections The TPS560200EVM-537 is provided with input/output connectors and test points as shown in Table 4. A power supply capable of supplying 2 A must be connected to J1 through a pair of 20-AWG wires. The load must be connected to J2 through a pair of 20-AWG wires. The maximum load current capability is 1 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. TP7 is used to monitor the output voltage with TP8 as the ground reference. Table 4. Connection and Test Points 4.2 Reference Designator Function J1-1 VIN positive sense and monitor point J1-2 VIN (see Table 1 for VIN range) J2-1 Ground return for VIN J2-2 VIN negative sense and monitor point J3-1 VOUT positive sense and monitor point J3-2 VOUT, 1.05 V at 0.5-A maximum J4-1 Ground return for VOUT J4-2 VOUT negative sense and monitor point JP1 EN control. Shunt EN to GND to disable, open EN to enable. TP1 Switch node test point TP2 Test point for loop response measurements Start-Up Procedure 1. Ensure that the jumper at JP1 (Enable control) is covered to shunt EN to GND, disabling the output. 2. Apply appropriate VIN voltage to VI (J1-2) and GND (J2-1). 3. Remove the jumper at JP1 (Enable control) to uncover EN and GND, enabling the output. 4 TPS560200EVM-537 0.5-A, Single Channel Regulator Evaluation Module Copyright © 2013, Texas Instruments Incorporated SLVU954 – September 2013 Submit Documentation Feedback Test Setup and Results www.ti.com 4.3 Efficiency Figure 1 shows the efficiency for the TPS560200EVM-537 at an ambient temperature of 25°C. 90 80 70 Efficiency - % VIN = 12 V VIN = 5 V 60 50 40 30 20 10 0 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 Output Current - A C001 Figure 1. TPS560200EVM-537 Efficiency Figure 2 shows the efficiency at light loads for the TPS560200EVM-537 at an ambient temperature of 25°C. 100 90 80 Efficiency - % 70 60 VIN = 5 V VIN = 12 V 50 40 30 20 10 0 0.001 0.01 0.1 1 Output Current - A C002 Figure 2. TPS560200EVM-537 Light Load Efficiency SLVU954 – September 2013 Submit Documentation Feedback TPS560200EVM-537 0.5-A, Single Channel Regulator Evaluation Module Copyright © 2013, Texas Instruments Incorporated 5 Test Setup and Results 4.4 www.ti.com Load Regulation The load regulation for the TPS560200EVM-537 is shown in Figure 3. 1.50 VIN = 5 V 1.00 Load Regulation - % VIN = 12 V 0.50 0.00 ±0.50 ±1.00 ±1.50 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 Output Current - A C003 Figure 3. TPS560200EVM-537 Load Regulation 4.5 Line Regulation The line regulation for the TPS560200EVM-537 is shown in Figure 4. 0.5 0.4 0.3 Line Rgulation - % 0.2 IOUT = 0.25 A 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 4 6 8 10 12 14 16 18 Input Voltage - V C004 Figure 4. TPS560200EVM-537 Line Regulation 6 TPS560200EVM-537 0.5-A, Single Channel Regulator Evaluation Module Copyright © 2013, Texas Instruments Incorporated SLVU954 – September 2013 Submit Documentation Feedback Test Setup and Results www.ti.com 4.6 Load Transient Response The TPS560200EVM-537 response to load transient is shown in Figure 5 and Figure 6. The current steps and slew rates are indicated in the figures. Total peak-to-peak voltage variation is as shown. VOUT = 50 mV / div (ac coupled) IOUT = 200 mA / div Load step = 125 mA - 375 mA, slew rate = 500 mA / µsec Time = 200 µsec / div Figure 5. TPS560200EVM-537 Load Transient Response, 25% to 75% Load Step VOUT = 50 mV / div (ac coupled) IOUT = 200 mA / div Load step = 10 mA - 250 mA, slew rate = 500 mA / µsec Time = 200 µsec / div Figure 6. TPS560200EVM-537 Load Transient Response, No Load to 50% Load Step SLVU954 – September 2013 Submit Documentation Feedback TPS560200EVM-537 0.5-A, Single Channel Regulator Evaluation Module Copyright © 2013, Texas Instruments Incorporated 7 Test Setup and Results 4.7 www.ti.com Output Voltage Ripple The TPS560200EVM-537 output voltage ripple is shown in Figure 7, Figure 8, and Figure 9. The output currents are as indicated. VOUT = 20 mV / div (ac coupled) SW = 5 V / div Time = 1 µsec / div Figure 7. TPS560200EVM-537 Output Voltage Ripple, IOUT = 0.5 A VOUT = 20 mV / div (ac coupled) SW = 5 V / div Time = 5 µsec / div Figure 8. TPS560200EVM-537 Output Voltage Ripple, IOUT = 30 mA 8 TPS560200EVM-537 0.5-A, Single Channel Regulator Evaluation Module Copyright © 2013, Texas Instruments Incorporated SLVU954 – September 2013 Submit Documentation Feedback Test Setup and Results www.ti.com VOUT = 20 mV / div (ac coupled) SW = 5 V / div Time = 2 msec / div Figure 9. TPS560200EVM-537 Output Voltage Ripple, IOUT = 0 A 4.8 Input Voltage Ripple The TPS560200EVM-537 input voltage ripple is shown in Figure 10. The output current is as indicated. VIN = 20 mV / div (ac coupled) SW = 5 V / div Time = 1 µsec / div Figure 10. TPS560200EVM-537 Input Voltage Ripple, IOUT = 0.5 A SLVU954 – September 2013 Submit Documentation Feedback TPS560200EVM-537 0.5-A, Single Channel Regulator Evaluation Module Copyright © 2013, Texas Instruments Incorporated 9 Test Setup and Results 4.9 www.ti.com Start-Up The TPS560200EVM-537 start-up waveform relative to VIN is shown in Figure 11. Load = 4 Ω resistive. VIN = 5 V / div EN = 5 V / div VOUT = 500 mV / div Time = 2 msec / div Figure 11. TPS560200EVM-537 Start-Up Relative to VIN The TPS560200EVM-537 start-up waveform relative to enable (EN) is shown in Figure 12. Load = 4 Ω resistive. VIN = 5 V / div EN = 5 V / div VOUT = 500 mV / div Time = 2 msec / div Figure 12. TPS560200EVM-537 Start-Up Relative to EN 10 TPS560200EVM-537 0.5-A, Single Channel Regulator Evaluation Module Copyright © 2013, Texas Instruments Incorporated SLVU954 – September 2013 Submit Documentation Feedback Test Setup and Results www.ti.com 4.10 Shut-Down The TPS560200EVM-537 shut-down waveform relative to VIN is shown in Figure 13. Load = 4 Ω resistive. VIN = 5 V / div EN = 5 V / div VOUT = 500 mV / div Time = 2 msec / div Figure 13. TPS560200EVM-537 Shut-Down Relative to VIN The TPS560200EVM-537 shut-down waveform relative to EN is shown in Figure 14. Load = 4 Ω resistive. VIN = 5 V / div EN = 5 V / div VOUT = 500 mV / div Time = 2 msec / div Figure 14. TPS560200EVM-537 Shut-Down Relative to EN SLVU954 – September 2013 Submit Documentation Feedback TPS560200EVM-537 0.5-A, Single Channel Regulator Evaluation Module Copyright © 2013, Texas Instruments Incorporated 11 Board Layout 5 www.ti.com Board Layout This section provides a description of the TPS560200EVM-537, board layout, and layer illustrations. 5.1 Layout The board layout for the TPS560200EVM-537 is shown in Figure 15 through Figure 17. The top layer contains the main power traces for VIN, VOUT, and ground. Also on the top layer are connections for the pins of the TPS560200 and a large area filled with ground. All of the signal traces also are located on the top side. The input decoupling capacitors, C1 and C2, are located as close to the IC as possible. The input and output connectors, test points, and all of the components are located on the top side. The bottom layer is a ground plane. Figure 15. Top Assembly 12 TPS560200EVM-537 0.5-A, Single Channel Regulator Evaluation Module Copyright © 2013, Texas Instruments Incorporated SLVU954 – September 2013 Submit Documentation Feedback Board Layout www.ti.com Figure 16. Top Layer SLVU954 – September 2013 Submit Documentation Feedback TPS560200EVM-537 0.5-A, Single Channel Regulator Evaluation Module Copyright © 2013, Texas Instruments Incorporated 13 Board Layout www.ti.com Figure 17. Bottom Layer 14 TPS560200EVM-537 0.5-A, Single Channel Regulator Evaluation Module Copyright © 2013, Texas Instruments Incorporated SLVU954 – September 2013 Submit Documentation Feedback Schematic, Bill of Materials, and Reference www.ti.com 6 Schematic, Bill of Materials, and Reference 6.1 Schematic Figure 18 is the schematic for the TPS560200EVM-537. J1 1 2 +VIS VI J2 GND -VIS U1 TPS560200 VIN 4.5-17V 4 VIN PH TP1 L1 10µH R3 0 TP2 C1 C2 10µF 0.1µF 1 1 2 EN C3 5 SH-1 JP1 1 2 VOUT 1.05V 3 VSENSE GND 2 open C4 C5 10µF 10µF J3 1 2 J4 1 2 R1 6.19k +VOS VO GND -VOS R2 20.0k Figure 18. TPS560200EVM-537Schematic Diagram SLVU954 – September 2013 Submit Documentation Feedback TPS560200EVM-537 0.5-A, Single Channel Regulator Evaluation Module Copyright © 2013, Texas Instruments Incorporated 15 Schematic, Bill of Materials, and Reference 6.2 www.ti.com Bill of Materials Table 5. Bill of Materials Designator Qty PCB 1 Part Number Manufacturer PWR537 C1 1 10uF CAP, CERM, 10uF, 25V, +/-10%, X5R, 1210 Any 1210 GRM32DR61E106KA12L C2 1 0.1uF MuRata CAP, CERM, 0.1uF, 16V, +/-5%, X7R, 0603 0603 0603YC104JAT2A C3 0 AVX CAP, CERM 0603 C4, C5 2 J1, J2, J3, J4, JP1 5 CAP, CERM, 10uF, 10V, +/-10%, X5R, 1210 1210 C1210C106K8PACTU Kemet Header, 100mil, 2x1, Tin plated, TH Header, 2 PIN, 100mil, Tin PEC02SAAN Sullins Connector Solutions L1 1 Inductor, Shielded Drum Core, Ferrite, 10uH, 2A, 0.045 ohm, SMD WE-PD-M 744777910 Wurth Elektronik eiSos LBL1 1 Thermal Transfer Printable Labels, 1.250" W x 0.250" H - 10,000 per roll PCB Label 1.25"H x 0.250"W THT-13-457-10 Brady R1 1 R2 1 6.19k RES, 6.19k ohm, 1%, 0.1W, 0603 0603 CRCW06036K19FKEA Vishay-Dale 20.0k RES, 20.0k ohm, 1%, 0.1W, 0603 0603 CRCW060320K0FKEA R3 Vishay-Dale 1 0 RES, 0 ohm, 5%, 0.1W, 0603 0603 ERJ-3GEY0R00V Panasonic SH-1 1 1x2 Shunt, 100mil, Gold plated, Black Shunt 969102-0000-DA 3M TP1 1 Yellow Test Point, Miniature, Yellow, TH Yellow Miniature Testpoint 5004 Keystone TP2 1 White Test Point, Miniature, White, TH White Miniature Testpoint 5002 Keystone U1 1 Step Down Converter, 4.5V to 17 V Input, 500 mA 5 Pin SOT23 TPS560200DBV5 Texas Instruments 6.3 Value Description Package Reference Printed Circuit Board 10uF 10uH Reference 1. TPS560200, 4.5V to 17V Input, 0.5-A Synchronous Step-Down SWIFT™ Converter with Advanced Eco-mode™ data sheet (SLVSC81) 16 TPS560200EVM-537 0.5-A, Single Channel Regulator Evaluation Module Copyright © 2013, Texas Instruments Incorporated SLVU954 – September 2013 Submit Documentation Feedback 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. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. 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