Enpirion(R) Power Evaluation Board EN6310QI 5.5Vin 1A Buck PowerSoC Evaluation Board User Guide Description This is the EN6310QI User Guide. The EN6310QI features an integrated inductor, power MOSFETS, a controller, a bulk of the compensation network, and protection circuitry against system faults. This level of integration delivers a substantial reduction in footprint and parts count over competing solutions. The evaluation board is optimized for engineering ease of testing through programming options, clip leads, test points and other supporting external components. Evaluation Board Over View Figure 1. EN6310QI Evaluation Board Illustration www.altera.com/enpirion 10621 January 12, 2015 Rev A EN6310QI Evaluation Board User Guide Instructions The numbers in the instructions below correspond to the numbers in Figure 1. By following the number sequence below, the device can be turned on by step 5. 1) ENABLE (J1) - Connecting a jumper to the upper two pins of J1 enables the device. Connecting a jumper on the lower two pins of J1 disables the device. Leave J1 open and use an external signal on TP8 to toggle the enable on (>1.8V) and off (<0.4V). 2) Output Voltage Settings (J4) - With a jumper placed as shown, output voltage is set to 1.2V. The jumper may be switched to change the output voltage from left to right (3.3V, 1.8V, 1.2V and 1.0V). The output voltage may also be adjusted by changing RB (R4) as shown in Figure 2. VOUT VOUT COUT RA CA 6) POK (TP10) - This is the open drain POK flag, which is pulled up to VIN by R1 when VOUT is over 90% of regulation. 7) SS (TP11) - The soft start capacitor is by defaulted 10nF and can be between 0.47nF to 10nF. See Datasheet for details. 8) External Compensation (R4 = Ra), C10 = Ca, R5= Rca) - The on board values are designed to work with a variety of input and output voltage ranges. For optimization, follow the table below: CIN = 4.7F/0603 + 100pF CAVIN = 20 + 0.47F COUT = 47F/0805 or 2x22F/0603 RA = 200k, RCA = 1k, RB = 0.6RA/(VOUT - 0.6) VIN (V) 5.5 VOUT (V) Ca (pF) 15 VIN (V) 5.5 5 3.3 15 5 4.5 15 4.5 5.5 15 3.3 33 15 2.7 39 15 5.5 39 3.3 15 5 39 5.5 15 4.5 5 15 3.3 47 15 2.7 47 3.3 22 5.5 39 2.7 22 5 39 5.5 22 4.5 5 22 3.3 56 22 2.7 56 5 RCA 4.5 VFB VFB = 0.6V PGND RB = EN6310QI VFB x RA VOUT - VFB 4.5 Figure 2. External Compensation 3) VIN (TP18) - Connect the positive terminal of a 2.7V to 5.5V power supply to TP18. Do not turn the power supply on until everything is connected correctly. 4) Ground (TP20 and TP21) - Connect the power supply's negative terminal ground to TP20 and the load ground to TP21. 5) VOUT (TP19) - Connect the load to TP19. If the instructions were followed up to this point, the power supply may be turned on. If output voltage is not present after turning on the power supply, check the position of the jumper on J1. 4.5 2.5 1.8 1.5 3.3 27 2.7 33 VOUT (V) Ca (pF) 27 27 1.2 1 0.6 33 39 47 9) Input Protection - The EN6310QI evaluation board comes with some input polarity protection. Be sure to follow input voltage specifications based on the Datasheet. www.altera.com/enpirion, Page 2 10621 January 12, 2015 Rev A EN6310QI Evaluation Board User Guide Evaluation Board Schematic www.altera.com/enpirion, Page 3 10621 January 12, 2015 Rev A EN6310QI Evaluation Board User Guide Bill of Materials Designator R1 R2 R4, R8 R5 R6 R7 R9 TP2,TP3,TP7,TP8, TP10-TP12,TP14TP16,TP18-TP21 C10 C1 C2 C5 C8 C9 C11 D1 Qty 1 1 2 1 1 1 1 Description RES 10.0 OHM 1/16W 1% 0402 SMD RES 100K OHM 1/16W 1% 0402 SMD RES 200K OHM 1/8W 0.1% 0805 SMD 1K 1% 0805 CHIP RESISTOR 1/8W RES 44.2K OHM 1/8W 1% 0805 SMD RES 100K OHM 1/8W 0.1% 0805 SMD RES 301K OHM 1/8W 0.1% 0805 SMD 14 TEST POINT SURFACE MOUNT 1 1 1 1 1 1 1 1 CAP CER 15PF 50V 5% NPO 0402 CAP, 10UF 0805 X7R 10% 10V CERAMIC CAP,4.7UF, 0603, 10V, 10%, X5R CAP CER 47UF 6.3V X5R 0805 CAP CER 10000PF 50V 10% X7R 0805 CAPACITOR CER 0.10UF 50V X7R 0402 CAP 47UF 16V ELECT FC SMD S2A DIODE MULTILAYER SMD FERRITE BEAD 4000MA 0805 L=TYPICAL (NOT GUARANTED) TERM BLOCK PCB 2POS 5.0MM GREEN CONNECTOR HEADER 8 POS .100" STR TIN COMPONENT NOT USED ** DO NOT INSTALL ** GOLD EN6310QI POL USING 6310-01 DIE 5X4_34L FB1 1 J1 J2, J3 C3,C6,C12,C13,R3 U1 1 2 5 1 www.altera.com/enpirion, Page 4 10621 January 12, 2015 Rev A EN6310QI Evaluation Board User Guide Test Recommendations To guarantee measurement accuracy, the following precautions should be observed: 1. 2. Make all input and output voltage measurements at the board using the test points provided (TP1 to TP9). This will eliminate voltage drop across the line and load cables that can produce false readings. 3. Measure input and output current with series ammeters or accurate shunt resistors. This is especially important when measuring efficiency. 4. Use a low-loop-inductance scope probe tip similar to the one shown below to measure switching signals and input / output ripple to avoid noise coupling into the probe ground lead. Input ripple, output ripple, and load transient deviation are best measured near the respective input / output capacitors. For more accurate ripple measurement, please see Enpirion App Note regarding this subject. 5. The board includes a pull-up resistor for the POK signal and ready to monitor the power OK status at clip lead marked POK. 6. The board includes an enable pin, which turns the device on when pulled high. When EN is low, the IC goes into shutdown mode. In "always-on" applications, EN can be tied to VIN. Contact Information Altera Corporation 101 Innovation Drive San Jose, CA 95134 Phone: 408-544-7000 www.altera.com (c) 2013 Altera Corporation--Confidential. All rights reserved. ALTERA, ARRIA, CYCLONE, ENPIRION, HARDCOPY, MAX, MEGACORE, NIOS, QUARTUS and STRATIX words and logos are trademarks of Altera Corporation and registered in the U.S. Patent and Trademark Office and in other countries. All other words and logos identif ied as trademarks or service marks are the property of their respective holders as described at www.altera.com/common/legal.html. Altera warrants performance of its semiconductor products to current specifications in accordance with Altera's standard warranty, but reserves the right to make changes to any products and serv ices at any time without notice. Altera assumes no responsibility or liability arising out of the application or use of any information, product, or service described herein except as expressly agreed to in writing by Altera. Altera customers are advised to obtain the latest version of device specifications before relying on any published information and bef ore placing orders f or products or serv ices. www.altera.com/enpirion, Page 5 10621 January 12, 2015 Rev A