FEBFAN23SV04T_LVA Evaluation Board. High-Efficiency Synchronous Buck Converter for DDR Termination. Featured Product: FAN23SV04T

Transcription

1 User Guide for FEBFANSV0T_LVA Evaluation Board High-Efficiency Synchronous Buck Converter for DDR Termination Featured Product: FANSV0T Direct questions or comments about this evaluation board to: Worldwide Direct Support Fairchild Semiconductor.com 0 Fairchild Semiconductor Corporation FEBFANSV0T_LVA Rev..0.0.

2 Table of Contents. Introduction..... Typical Applications..... Features.... Evaluation Board Specifications.... Schematic.... Test Setup Test Equipment Test Setup Configuration V DDQ Input Enable Selection On board transient generator Test Procedure Measurement Procedure List of Test Points and Connections Performance Data and Characteristic Curves Printed Circuit Board Bill of Materials Revision History... 0 Fairchild Semiconductor Corporation FEBFANSV0T_LVA Rev..0.0.

3 . Introduction This user guide supports the evaluation board for the FANSV0T integrated synchronous buck regulators for Double Date Rate (DDR) tracking applications. It should be used in conjunction with the FANSV0T datasheet. Please visit Fairchild s website at This evaluation board highlights the FANSV0T integrated 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... Typical Applications Servers NVDC Notebooks Telecommunications Game Consoles Storage.. Features V DDQ Input Functions as Reference Input Internal Resistive Divider Programs V OUT =0.5 V DDQ 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. Evaluation Board Specifications Description Symbol Value Comments Input Voltage 7-5 V V DDQ Input VDDQ 0- V Output Voltage V OUT 0.6 V Switching Frequency f SW 500 khz Output Load Current I OUT 0- A Output Current Limit 0% Maximum load current PCB Size 7 cm X 7 cm PCB Layer Layers PCB Thickness.6 mm PCB Copper Thickness oz- oz- oz- oz 0 Fairchild Semiconductor Corporation FEBFANSV0T_LVA Rev..0.0.

4 LOAD_B LOAD_A FB ILIM SW C C C8 7uF/6.V C 7uF/6.V C 7uF/6.V C 7uF/6.V C6 /0 C7 /0 C8 /0 C9 / Schematics J9 J9 J0 PVCC J5 J0 C9.uF U FANSV0T VCC R 0 J PVCC 5 VCC PVCC VCC 6 VCC C8 8 0.uF C7 5nF NC SS 0 SS EN 9 EN R7 R9 7K C FREQ R8 VDDQ M VDDQ NC NC VDDQ J VIN BOOT SW SW 6 SW 5 SW SW SW SW SW 7 R 0 J7 J C5 C 0uF/5V + C C0 J 0.uF C C 0uF/5V C 0.uF J8 VSW VSW R K R0 C5 00pF C9 J GND J9 VOUT J R VOUT VOUT L 0.7uH VOUT C 0.uF R 0K J7 VOUT C6 + + J8 R R9 0 R5.K J J GND GND VCC EN DO NOT CONNECT J6 J6 VFB J6 VDDQ J EN J SS VDDQ EN SS J8 FB C0 R R5 Q N700 C5 J0 VSTEP Figure. Evaluation Board Regulator Schematic J Transient U MIC59-5.0YS IN OUT GND GND 5V 5V C0 uf/6.v External Frequency Generator J5 EXT TR R7 0K R8 0K VOUT R 99 C7 0.uF S SW DIP- R5 0. R 0K U LM VCC GND 6 DIS TRIG 5 THIRS OUT CV RST U FAN6T 8 ENA ENB 7 INA OUTA 6 GND VDD 5 INB OUTB OUTA OUTB R 0 Q FDMS7658AS R6 0. R6.K R 5K C6 0.uF R 0 Q FDMS7658AS Figure. Evaluation Board Transient Generator Schematic 0 Fairchild Semiconductor Corporation FEBFANSV0T_LVA Rev..0.0.

5 . Test Setup.. Test Equipment 0-5 V / 5 A power supply for input voltage Oscilloscope to view waveforms 0-5 V / 0. A power supply for optional external enable signal.. Test Setup Adjust V IN power supply, V DDQ supply, and external EN supply to 0 V. Connect V IN supply to (J) and GND (J). Connect V DDQ supply to VDDQ (J6) and (J9). Connect external enable source to EN (J) and (J5). Optional filter can be installed to filter V DDQ track input source local to evaluation board if needed. With filter installed, V DDQ voltage at (J6) is half (½) the voltage of the V DDQ supply. Optional Filter Ext enable (0-5VDC) 0.uF 5k 5k VDDQ Supply (0-VDC) Supply (0-5VDC) Output Load (0-A DC) Figure. Test Setup for FANSV0T Tracking Application 0 Fairchild Semiconductor Corporation 5 FEBFANSV0T_LVA Rev..0.0.

6 5. Configuration 5.. V DDQ Input Figure shows an optional filter on the V DDQ (tracking) input. This filter is not required for operation, but is useful to filter the V DDQ supply voltage input, which is used to develop the reference for the output voltage. This can help reduce frequency jitter. 5.. Enable Selection The FANSV0T evaluation board can be enabled using an external enable logic signal as shown in Figure. R8 can be populated with MΩ to hold EN LOW by default. 5.. On board transient generator Transient generator circuitry, shown in Figure, 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 J enables the transient generator. J to conduct efficiency testing. R and R adjust the frequency and duty cycle of the 555 timer. J5 can be used to monitor transient frequency and to trigger oscilloscope. Switch S enables turn-on of load switch Q, Q, or both simultaneously. Load applied with Q ON is equal to V OUT /R5; with Q ON is equal to V OUT /R6. Use low duty cycle to minimize power dissipation on PCB. R/R can be increased in value to reduce load current slew rate. 0 Fairchild Semiconductor Corporation 6 FEBFANSV0T_LVA Rev..0.0.

7 6. Test Procedure 6.. Measurement Procedure. Set up equipment and board as shown in Figure.. For efficiency testing, open J (disable transient generator).. Adjust load to sink 0 A.. Monitor V IN on J7(+) and J(-) as voltage is increased from 0 V to V. 5. Adjust the external enable signal to. V to enable converter operation. 6. Adjust the V DDQ signal from 0 to.5 V, monitoring on the VDDQ pin. 7. Monitor PVCC on J0(+) and J9(-) as voltage is increased from 0 to 5 V. 8. Monitor V OUT on J(+) and J(-). 9. With I OUT from 0 to maximum I OUT ; V OUT should remain in regulation. 0. To disable the converter, adjust external enable signal to 0 V.. After converter is disabled, reduce to 0 V. 6.. List of Test Points and Connections Test Points Name Description J VIN connection (+) J GND VIN connection (-) J Transient Connects to power transient generator J5 Ext TR External Transient Generator Frequency Monitor J6 EN Connects EN to VCC for auto-enable with non-sv parts J7 VOUT V OUT connection (+) J8 GND V OUT connection (-) J9 VOUT V OUT scope jack J0 VSTEP Input to optional V OUT step circuit J VCC Monitor VCC voltage J SS SS(Soft-Start) pin 0 J EN Enable input to controller J6 VDDQ VDDQ Track input J7 Input voltage (+) J8 FB Feedback pin 7 J9 J0 PVCC PVCC supply input (+) J GND J GND Input voltage (-) J GND V OUT monitor (-) J VOUT V OUT monitor (+) J5 reference for EN input J8 VSW Switch node scope jack J9 PVCC supply input (-) J0 No connect J No connect 0 Fairchild Semiconductor Corporation 7 FEBFANSV0T_LVA Rev..0.0.

8 7. Performance Data and Characteristic Curves Figure. Typical Startup Waveforms with V DDQ before EN Applied Figure 5. Typical Shutdown Using EN 0 Fairchild Semiconductor Corporation 8 FEBFANSV0T_LVA Rev..0.0.

9 8. Printed Circuit Board Figure 6. Top Side Figure 7. Bottom Side 0 Fairchild Semiconductor Corporation 9 FEBFANSV0T_LVA Rev..0.0.

10 Figure 8. Inner Layer Figure 9. Inner Layer 0 Fairchild Semiconductor Corporation 0 FEBFANSV0T_LVA Rev..0.0.

11 9. Bill of Materials Reference Value Description Manufacturer PN Manufacturer Case Qty C 0 µf C 0 µf C 0. µf C 0. µf C5 00 pf C µf C8 0. µf C9. µf C0 0. µf C8 7 µf C 7 µf C 7 µf C 7µF Ceramic, X7R, 5 V Ceramic, X7R, 5 V Ceramic, X7R, 5 V Ceramic, X7R, 5 V Ceramic, NPO, 50 V Ceramic, X7R, 5 V Ceramic, X7R, 5 V Ceramic, X5R, 5 V Ceramic, X7R, 5 V Ceramic, 6. V Ceramic, 6. V Ceramic, 6. V Ceramic, 6. V TMK6B706KL-TD Taiyo Yuden 06 TMK6B706KL-TD Taiyo Yuden 06 C608X7RE0K TDK 060 C608X7RE0K TDK 060 C608COGH0J TDK 060 C608X7RE5K TDK 060 C608X7RE0K TDK 060 C608X5RE5M TDK 060 C608X7RE0K TDK 060 C6X5R0J76M TDK 06 C6X5R0J76M TDK 06 C6X5R0J76M TDK 06 C6X5R0J76M TDK 06 R 0 Ω RES, SMD, /0W 060 R kω RES, SMD, /0W 060 R 0 kω RES, SMD, /0W 060 R5. kω RES, SMD, /0W 060 R8 MΩ RES, SMD, /0W 060 R9 7 kω RES, SMD, /0W 060 R 0 Ω RES, SMD, /0W 060 R9 0 Ω RES, SMD, /0W 060 L 70 nh Inductor, Power 7507 Wurth U J-J, J7-J8 J0,J-, J6-5, J9 PCB FANSV0T TinyBuck A COT Integrated Regulator Terminal, 5 A, Screw, Vertical, PC Mount Testpin, Gold, 0 mil PCB, FANSV0T EB Rev 0., Jan FANSV0T Fairchild MLP 5.5x5 89 Keystone (DS0P) Mill-Max (Young Jin) 5 Continued on the following page 0 Fairchild Semiconductor Corporation FEBFANSV0T_LVA Rev..0.0.

12 Reference Value Description Manufacturer PN Manufacturer Case Qty Transient Generator C6 0. µf C7 0. µf C0 µf Ceramic, 5 V, X7R Ceramic, 5 V, X7R Ceramic, 0 V, X5R C608X7RE0K TDK 060 C608X7RE0K TDK 060 LMKBJ6MG-T TAIYO YUDEN 0805 R6. kω Resistor, SMD, /0W ERJ-EKF0V Panasonic 060 R 99 Ω Resistor, SMD, /0W ERJ-EKF990V Panasonic 060 R 0 kω Pot, 0.5W 66W--0LF Bourns R 5 kω Pot, 0.5W 66W--5LF Bourns R5-R6 0. Ω Resistor, SMD, W ERJ-TRQFRU Panasonic 5 R7-R8 0 kω Resistor, SMD, /0W ERJ-EKF00V Panasonic 060 R-R 0 Resistor, SMD, /0W ERJ-GEY0R00V Panasonic 060 U LM555 Timer LM555CM Fairchild SO8 U FAN6T Driver FAN6TM Fairchild SO8 U MIC59 LDO MIC59-5.0YS Micrel J Generic -Pin SIP.00 Centers J5 Testpin, Gold, 0 mil Mill-Max Q-Q FDMS7658AS MOSFET FDMS7658AS Fairchild MLP5x6 S 09-MS Switch DIP Top Slide Flush 6-POS SOT- 09-MS CTS DIP Q-Q FDMS7658AS MOSFET FDMS7658AS Fairchild MLP5x6 0 Fairchild Semiconductor Corporation FEBFANSV0T_LVA Rev..0.0.

13 0. Revision History Rev. Date Description 0.0. November 0 Initial draft of FANSV0T 0.0. March 0 Updated with changes of FANSV0T EB Rev May 0 Added PCB structure. Updated schematic & BOM.0.0 June 0 Added EVB# on page. & Release 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:. 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.. 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, 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. 0 Fairchild Semiconductor Corporation FEBFANSV0T_LVA Rev..0.0.