Enpirion(R) Power Evaluation Board EY1602S-ADJ 40V, Low Quiescent Current 50mA Linear Regulator Evaluation Board User Guide Description This is the EY1602SI User Guide. The EY1602SI features a high voltage, low quiescent current, temperature shutdown and current limit protection. EY1602SI has a Low Dropout Voltage of 120mV at 50mA. It features an EN pin that can be used to put the device into a low-quiescent current Shutdown mode with 18A. 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. EY1602SI Evaluation Board Illustration (Follow instructions on page 2) www.altera.com/enpirion 10424 October 9, 2014 Rev A EY1602SI-ADJ 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 safely. 1) VIN (TP1) - Connect 6V to 40V supply on TP1. Do not turn on until everything is connected correctly. Please note that hot plugging is not recommended. 2) VOUT (TP3) - Connect the load to TP3. This device can deliver a wide range of output voltage from 2.5V to 12V. Vout can be programed by the voltage selector as will be shown in this document. Where Rx= R1, 2, 3....8 5) EN (JP9) - The EY1602SI features an enable pin (EN). When it is pulled low, the IC goes into shutdown mode. In this condition, the device draws less than 2A. Figure 2 shows the conditions of the enable jumper. The device is enabled in Figure 1a which connects the EN pin to VIN through the resistor divider R10, and disabled in Figure 1b which connects EN pin to ground. 3) Ground (TP2 and TP4) - Connect the input ground to TP2 and the output ground to TP4. 4) Output Voltage Settings (JP1- JP8) - As shown, output voltage is set to 3.3V by placing the jumper on JP5. The jumper may be switched to change the output voltage. From left to right R1 to R8, (Floating, 1.5V, 1.8V, 2.5V, 3.3V, 5V, 12V, 15V). Vout follow the next equation. = . + (a) (b) (b) Figure 2. EY1602SI Enable jumper conditions As shown in Figure 2c remove the jumper to apply an external signal to right two pins of JP9 to toggle the enable on (>1.48V) and off (<0.93V). Bill of Materials Designator C1, C2, C4, C5 C3 JP1, JP2, JP3, JP4, JP5, JP6, JP7, JP8 JP9 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 TP1, TP2, TP3, TP4 U1 Qty Description 4 CAP,SMD,1206,10uF,50V,10%,X5R,ROHS 1 CAP,SMD,0603,47pF,50V,5%,C0G,NP0,ROHS 8 1 1 1 1 1 1 1 1 1 1 1 4 1 CONN-HEADER,1X2,RETENTIVE,2.54mm,0.230X 0.120,ROHS CONN-HEADER,1x3,BREAKAWY 1X36,2.54mm,ROHS RES,SMD,0603,DNP-PLACE HOLDER,ROHS RC0603FR-0760K4L CR0603-10W-3012FT CR0603-10W-1402FT ERJ-3EKF8661V CR0603-10W-4751FT RES,SMD,0603, 1.65K, 1/10W, 1%, TF,ROHS RES,SMD,0603, 1.3K, 1/10W,1%,TF,ROHS RES,SMD,0603,15K,1/10W,1%,TF,ROHS RES, SMD, 0603, 10K, 1/10W, 1%, TF,ROHS CONN-TURRET,TERMINAL POST,TH,ROHS IC-40V LDO ADJ. LINEAR REGULATOR,8P,EPSOIC,ROHS www.altera.com/enpirion, Page 2 10424 October 9, 2014 Rev A EY1602SI-ADJ Evaluation Board User Guide Evaluation Board Schematic Figure 3. EY1602SI Evaluation Board schematic www.altera.com/enpirion, Page 3 10424 October 9, 2014 Rev A EY1602SI-ADJ Evaluation Board User Guide Test Recommendations To guarantee measurement accuracy, the following precautions should be observed: 1. Make all input and output voltage measurements at the board using the test points provided (TP1 to TP3). This will eliminate voltage drop across the line and load cables that can produce false readings. 2. Measure input and output current with series ammeters or accurate shunt resistors. This is especially important when measuring efficiency. 3. 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. 4. This product has built-in over current protection. If protection against an overload condition is required, an appropriate external solution needs to be used. Please refer to the Enpirion application note for further details on this subject. 5. Do not let the enable pin floating as it may be affected by external noise. 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 4 10424 October 9, 2014 Rev A