User Guide for FEBFAN23SV04T_LVA Evaluation Board High-Efficiency Synchronous Buck Converter for DDR Termination Featured Product: FAN23SV04T Direct questions or comments about this evaluation board to: “Worldwide Direct Support” Fairchild Semiconductor.com © 2015 Fairchild Semiconductor Corporation FEBFAN23SV04T_LVA • Rev. 1.1 Table of Contents 1. Introduction ............................................................................................................................... 3 1.1. 1.2. Typical Applications ..................................................................................................... 3 Features ......................................................................................................................... 3 2. Evaluation Board Specifications ............................................................................................... 3 3. Schematic .................................................................................................................................. 4 4. Test Setup.................................................................................................................................. 5 4.1. 4.2. Test Equipment ............................................................................................................. 5 Test Setup...................................................................................................................... 5 5. Configuration ............................................................................................................................ 6 5.1. 5.2. 5.3. VDDQ Input .................................................................................................................... 6 Enable Selection............................................................................................................ 6 On board transient generator ......................................................................................... 6 6. Test Procedure .......................................................................................................................... 7 6.1. 6.2. Measurement Procedure................................................................................................ 7 List of Test Points and Connections ............................................................................. 7 7. Performance Data and Characteristic Curves ........................................................................... 8 8. Printed Circuit Board ................................................................................................................ 9 9. Bill of Materials ...................................................................................................................... 11 10. Revision History ..................................................................................................................... 13 © 2015 Fairchild Semiconductor Corporation 2 FEBFAN23SV04T_LVA • Rev. 1.1 This user guide supports the evaluation board for the FAN23SV04T synchronous buck regulators for Double Date Rate (DDR) tracking applications. It should be used in conjunction with the FAN23SV04T datasheet. Please visit Fairchild’s website at www.fairchildsemi.com. 1. Introduction This evaluation board highlights the FAN23SV04T synchronous buck regulators for DDR-tracking applications, and combines Fairchild’s constant on-time control architecture with an integrated MOSFETs to supply high-efficiency Point of Load (POL) solutions. 1.1. Typical Applications Servers NVDC Notebooks Telecommunications Game Consoles Storage 1.2. Features 2. VDDQ Input Functions as Reference Input Internal Resistive Divider Programs VOUT =0.5 VDDQ Configurable Enable Function On-board Transient Generator with Adjustable Load Current Slew Rate Internal Regulator; Requires No External Bias Supply Test Points for Probing Critical Waveforms, Efficiency Measurements Evaluation Board Specifications Table 1. Evaluation Board Specifications Description Symbol Value Input Voltage PVIN 7-15 V VDDQ Input VDDQ 0-3 V VOUT 0.6 V Switching Frequency fSW 500 kHz Output Load Current IOUT Output Voltage 0-4 A Output Current Limit 120% PCB Size 7 cm X 7 cm PCB Layer 4 Layers PCB Thickness Maximum load current 1.6 mm PCB Copper Thickness © 2015 Fairchild Semiconductor Corporation Comments 1 oz-1 oz-1 oz-1 oz 3 FEBFAN23SV04T_LVA • Rev. 1.1 3. Schematics J17 PVIN PVIN C25 Open PVIN J29 J20 PGND PVCC + J30 C10 0.1uF C11 Open 1 J2 2 3 4 PGND PGND 1 10 PGND 3 2 1 R19 0 5 J9 VOUT VOUT L1 0.72uH Open/1210 47uF/6.3V Open/1210 Open/1210 C28 C27 17 C26 + 47uF/6.3V + C12 C6 Open C23 R3 10K C22 0.1uF C5 100pF C19 Open 22 C4 Open 12 47uF/6.3V R2 1K R20 Open 13 C18 14 Open VSW R4 Open R5 1.1K 1 J7 2 VOUT 3 4 VOUT Open/1210 15 R21 Open 1 J8 2 PGND 3 4 PGND C29 J24 VOUT 1 5 16 SW ILIM SW C3 0.1uF 2 36 J31 18 27 VDDQ 24 NC AGND SW AGND NC 4 3 2 J28 4 VSW 3 2 C13 VIN SW 3 1 11 PVIN 5 PVIN 6 PVIN 7 PVIN 8 PVIN 9 VDDQ FB 34 SW 4 33 SW FREQ AGND VDDQ R8 1M 31 EN AGND C31 Open 32 35 R9 27K SW PGND R7 Open SW SS 23 EN 29 PVIN NC PGND SS 30 SW 21 C7 15nF VCC 20 28 C8 0.1uF PVIN 26 BOOT PGND VCC C1 10uF/25V J23 GND R1 0 PVCC 19 25 PVIN PVCC PVIN R11 10 PGND VCC J12 VCC C24 Open U1 FAN23SV04T 37 C9 2.2uF 47uF/6.3V J25 AGND C21 J19 AGND 1 J1 2 3 4 PVIN C2 10uF/25V J21 J22 GND GND VCC 1 2 EN DO NOT CONNECT J6 VFB J6 C30 Open VDDQ J16 VDDQ R24 Open SS J18 FB 1 Q3 2N7002 R25 Open VSTEP C15 Open 3 J13 SS 2 J10 J14 EN EN Figure 1. Evaluation Board Regulator Schematic PVIN J3 1 2 Transient U4 MIC5239-5.0Y S 3 IN OUT 2 4 GND GND 1 5V External Frequency Generator 5V PGND J5 EXT TR C20 22uF/6.3V R17 10K R18 10K PGND 3 4 VOUT R15 0.24 5 6 7 8 9 2 1 C17 0.1uF R12 499 LOAD_A S1 SW DIP-2 U2 VCC DIS THIRS CV GND TRIG OUT RST U3 1 2 3 4 1 2 3 4 Q1 FDMS7658AS FAN3226T ENA INA GND INB ENB OUTA VDD OUTB 8 7 6 5 OUTA OUTB 5 6 7 8 9 8 7 6 5 LM555 3 2 1 R13 10K R16 0.24 4 LOAD_B R22 0 R14 25K C16 0.1uF R23 0 PGND 4 Q2 FDMS7658AS 3 2 1 R6 1.2K Figure 2. Evaluation Board Transient Generator Schematic © 2015 Fairchild Semiconductor Corporation 4 FEBFAN23SV04T_LVA • Rev. 1.1 4. Test Setup 4.1. Test Equipment 0-15 V / 5 A power supply for input voltage Oscilloscope to view waveforms 0-5 V / 0.1 A power supply for optional external enable signal 4.2. Test Setup Adjust VIN power supply, VDDQ supply, and external EN supply to 0 V. Connect VIN supply to PVIN (J1) and GND (J2). Connect VDDQ supply to VDDQ (J16) and AGND (J19). Connect external enable source to EN (J14) and AGND (J25). Optional filter can be installed to filter VDDQ track input source local to evaluation board if needed. With filter installed, VDDQ voltage at (J16) is half (½) the voltage of the VDDQ supply. Optional Filter Ext enable (0-5VDC) 0.1uF 5k 5k VDDQ Supply (0-3VDC) PVIN Supply (0-15VDC) Output Load (0-4A DC) Figure 3. Test Setup for FAN23SV04T Tracking Application © 2015 Fairchild Semiconductor Corporation 5 FEBFAN23SV04T_LVA • Rev. 1.1 5. Configuration 5.1. VDDQ Input Figure 3 shows an optional filter on the VDDQ (tracking) input. This filter is not required for operation, but is useful to filter the VDDQ supply voltage input, which is used to develop the reference for the output voltage. This can help reduce frequency jitter. 5.2. Enable Selection The FAN23SV04T evaluation board can be enabled using an external enable logic signal as shown in Figure 3. R8 can be populated with 1 MΩ to hold EN LOW by default. 5.3. On board transient generator Transient generator circuitry, shown in Figure 2, is included on the bottom of the board to facilitate testing of extremely fast transient loads, with the following usage guidelines: A shorting jumper installed in J3 enables the transient generator. Open J3 to conduct efficiency testing. R13 and R14 adjust the frequency and duty cycle of the 555 timer. J5 can be used to monitor transient frequency and to trigger oscilloscope. Switch S1 enables turn-on of load switch Q1, Q2, or both simultaneously. Load applied with Q1 ON is equal to VOUT/R15; with Q2 ON is equal to VOUT/R16. Use low duty cycle to minimize power dissipation on PCB. R22/R23 can be increased in value to reduce load current slew rate. © 2015 Fairchild Semiconductor Corporation 6 FEBFAN23SV04T_LVA • Rev. 1.1 6. Test Procedure 6.1. Measurement Procedure 1. Set up equipment and board as shown in Figure 3. 2. For efficiency testing, open J3 (disable transient generator). 3. Adjust load to sink 0 A. 4. Monitor VIN on J17(+) and J23(-) as voltage is increased from 0 V to 12 V. 5. Adjust the external enable signal to 3.3 V to enable converter operation. 6. Adjust the VDDQ signal from 0 to 1.5 V, monitoring on the VDDQ pin. 7. Monitor PVCC on J20(+) and J19(-) as voltage is increased from 0 to 5 V. 8. Monitor VOUT on J24(+) and J23(-). 9. With IOUT from 0 to maximum IOUT; VOUT should remain in regulation. 10. To disable the converter, adjust external enable signal to 0 V. 11. After converter is disabled, reduce PVIN to 0 V. 6.2. List of Test Points and Connections Test Points Name Description J1 J2 J3 J5 J6 J7 J8 J9 J10 J12 J13 J14 J16 J17 J18 J19 J20 J21 J22 J23 J24 J25 J28 J29 J30 J31 PVIN GND Transient Ext TR EN VOUT GND VOUT VSTEP VCC SS EN VDDQ PVIN FB AGND PVCC GND GND GND VOUT AGND VSW PGND VIN connection (+) VIN connection (-) Connects PVIN to power transient generator External Transient Generator Frequency Monitor Connects EN to VCC for auto-enable with non-SV parts VOUT connection (+) VOUT connection (-) VOUT scope jack Input to optional VOUT step circuit Monitor VCC voltage SS(Soft-Start) pin 30 Enable input to controller VDDQ Track input Input voltage (+) Feedback pin 27 © 2015 Fairchild Semiconductor Corporation PVCC supply input (+) Input voltage (-) VOUT monitor (-) VOUT monitor (+) AGND reference for EN input Switch node scope jack PVCC supply input (-) No connect No connect 7 FEBFAN23SV04T_LVA • Rev. 1.1 7. Performance Data and Characteristic Curves Figure 4. Typical Startup Waveforms with VDDQ before EN Applied Figure 5. Typical Shutdown Using EN © 2015 Fairchild Semiconductor Corporation 8 FEBFAN23SV04T_LVA • Rev. 1.1 8. Printed Circuit Board Figure 6. Top Side Figure 7. Bottom Side © 2015 Fairchild Semiconductor Corporation 9 FEBFAN23SV04T_LVA • Rev. 1.1 © 2015 Fairchild Semiconductor Corporation Figure 8. Inner Layer 1 Figure 9. Inner Layer 2 10 FEBFAN23SV04T_LVA • Rev. 1.1 9. Bill of Materials Reference Value Description Manufacturer PN Manufacturer Case Qty C1 10 µF Capacitor, SMD, Ceramic, X7R, 25 V TMK316B7106KL-TD Taiyo Yuden 1206 1 C2 10 µF Capacitor, SMD, Ceramic, X7R, 25 V TMK316B7106KL-TD Taiyo Yuden 1206 1 C3 0.1 µF Capacitor, SMD, Ceramic, X7R, 25 V C1608X7R1E104K TDK 0603 1 C4 0.1 µF Capacitor, SMD, Ceramic, X7R, 25 V C1608X7R1E104K TDK 0603 1 C5 100 pF Capacitor, SMD, Ceramic, NPO, 50 V C1608COG1H101J TDK 0603 1 C7 0.015 µF Capacitor, SMD, Ceramic, X7R, 25 V C1608X7R1E153K TDK 0603 1 C8 0.1 µF Capacitor, SMD, Ceramic, X7R, 25 V C1608X7R1E104K TDK 0603 1 C9 2.2 µF Capacitor, SMD, Ceramic, X5R, 25 V C1608X5R1E225M TDK 0603 1 C10 0.1 µF Capacitor, SMD, Ceramic, X7R, 25 V C1608X7R1E104K TDK 0603 1 C18 47 µF Capacitor, SMD, Ceramic, 6.3 V C3216X5R0J476M TDK 1206 1 C21 47 µF Capacitor, SMD, Ceramic, 6.3 V C3216X5R0J476M TDK 1206 1 C22 47 µF Capacitor, SMD, Ceramic, 6.3 V C3216X5R0J476M TDK 1206 1 C23 47µF Capacitor, SMD, Ceramic, 6.3 V C3216X5R0J476M TDK 1206 1 R1 0Ω RES, SMD, 1/10W 0603 1 R2 1 kΩ RES, SMD, 1/10W 0603 1 R3 10 kΩ RES, SMD, 1/10W 0603 1 R5 1.1 kΩ RES, SMD, 1/10W 0603 1 R8 1 MΩ RES, SMD, 1/10W 0603 1 R9 27 kΩ RES, SMD, 1/10W 0603 1 R11 10 Ω RES, SMD, 1/10W 0603 1 R19 0Ω RES, SMD, 1/10W 0603 1 L1 720 nH Inductor, Power U1 FAN23SV04T 744325072 Wurth 1 MLP 5.5x5 4 A COT Regulator FAN23SV04T Fairchild 1 J1-J2, J7-J8 Terminal, 15 A, Screw, Vertical, PC Mount 8191 Keystone 4 J10,J12-14, J16-25, J29 Testpin, Gold, 40 mil 3103-2-00-21-00-00-08-0 (DS10P11) Mill-Max (Young Jin) 15 PCB PCB, FAN23SV04T EB Rev 0.1, Jan 13 1 Continued on the following page… © 2015 Fairchild Semiconductor Corporation 11 FEBFAN23SV04T_LVA • Rev. 1.1 Reference Value Description Manufacturer PN Manufacturer Case Qty Transient Generator C16 0.1 µF Capacitor, SMD, Ceramic, 25 V, X7R C1608X7R1E104K TDK 0603 1 C17 0.1 µF Capacitor, SMD, Ceramic, 25 V, X7R C1608X7R1E104K TDK 0603 1 C20 22 µF Capacitor, SMD, Ceramic, 10 V, X5R LMK212BJ226MG-T TAIYO YUDEN 0805 1 R6 1.2 kΩ Resistor, SMD, 1/10W ERJ-3EKF1201V Panasonic 0603 1 R12 499 Ω Resistor, SMD, 1/10W ERJ-3EKF4990V Panasonic 0603 1 R13 10 kΩ Pot, 0.25W 3266W-1-103LF Bourns 1 R14 25 kΩ Pot, 0.25W 3266W-1-253LF Bourns 1 R15-R16 0.24 Ω Resistor, SMD, 1W ERJ-1TRQFR24U Panasonic 2512 2 R17-R18 10 kΩ Resistor, SMD, 1/10W ERJ-3EKF1002V Panasonic 0603 2 R22-R23 0 Resistor, SMD, 1/10W ERJ-3GEY0R00V Panasonic 0603 2 U2 LM555 Timer LM555CM Fairchild SO8 1 U3 FAN3226T Driver FAN3226TM Fairchild SO8 1 U4 MIC5239 LDO MIC5239-5.0YS Micrel SOT223 1 J3 Generic 2-Pin SIP .100 Centers J5 Testpin, Gold, 40 mil 3103-2-00-21-00-00-08-0 Mill-Max 1 1 Q1-Q2 FDMS7658AS MOSFET FDMS7658AS Fairchild MLP5x6 1 S1 209-2MS Switch DIP Top Slide Flush 6-POS 209-2MS CTS DIP4 1 Q1-Q2 FDMS7658AS MOSFET FDMS7658AS Fairchild MLP5x6 2 © 2015 Fairchild Semiconductor Corporation 12 FEBFAN23SV04T_LVA • Rev. 1.1 10. Revision History Rev. Date Description 0.0.1 November 2012 0.0.2 March 2013 Updated with changes of FAN23SV04T EB Rev0.1 0.0.3 May 2013 Added PCB structure. Updated schematic & BOM 1.0.0 June 2013 Added EVB# on page.1 & Release 1.1 May 2015 Removed “Integrated TinyBuck” & Changed TOP side picture of PCB layout Initial draft of FAN23SV04T WARNING AND DISCLAIMER Replace components on the Evaluation Board only with those parts shown on the parts list (or Bill of Materials) in the Users’ Guide. Contact an authorized Fairchild representative with any questions. This board is intended to be used by certified professionals, in a lab environment, following proper safety procedures. Use at your own risk. The Evaluation board (or kit) is for demonstration purposes only and neither the Board nor this User’s Guide constitute a sales contract or create any kind of warranty, whether express or implied, as to the applications or products involved. Fairchild warrantees that its products meet Fairchild’s published specifications, but does not guarantee that its products work in any specific application. Fairchild reserves the right to make changes without notice to any products described herein to improve reliability, function, or design. Either the applicable sales contract signed by Fairchild and Buyer or, if no contract exists, Fairchild’s standard Terms and Conditions on the back of Fairchild invoices, govern the terms of sale of the products described herein. DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION, OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. ANTI-COUNTERFEITING POLICY Fairchild Semiconductor Corporation's Anti-Counterfeiting Policy. Fairchild's Anti-Counterfeiting Policy is also stated on our external website, www.fairchildsemi.com, under Sales Support. Counterfeiting of semiconductor parts is a growing problem in the industry. All manufacturers of semiconductor products are experiencing counterfeiting of their parts. Customers who inadvertently purchase counterfeit parts experience many problems such as loss of brand reputation, substandard performance, failed applications, and increased cost of production and manufacturing delays. Fairchild is taking strong measures to protect ourselves and our customers from the proliferation of counterfeit parts. Fairchild strongly encourages customers to purchase Fairchild parts either directly from Fairchild or from Authorized Fairchild Distributors who are listed by country on our web page cited above. Products customers buy either from Fairchild directly or from Authorized Fairchild Distributors are genuine parts, have full traceability, meet Fairchild's quality standards for handling and storage and provide access to Fairchild's full range of up-to-date technical and product information. Fairchild and our Authorized Distributors will stand behind all warranties and will appropriately address any warranty issues that may arise. Fairchild will not provide any warranty coverage or other assistance for parts bought from Unauthorized Sources. Fairchild is committed to combat this global problem and encourage our customers to do their part in stopping this practice by buying direct or from authorized distributors. EXPORT COMPLIANCE STATEMENT These commodities, technology, or software were exported from the United States in accordance with the Export Administration Regulations for the ultimate destination listed on the commercial invoice. Diversion contrary to U.S. law is prohibited. U.S. origin products and products made with U.S. origin technology are subject to U.S Re-export laws. In the event of re-export, the user will be responsible to ensure the appropriate U.S. export regulations are followed. © 2015 Fairchild Semiconductor Corporation 13 FEBFAN23SV04T_LVA • Rev. 1.1