Application Note 1645 ISL97519A Evaluation Board Application Manual Description Quick Setup Guide The ISL97519AIUZ-EVALZ evaluation board is an evaluation kit for evaluating the ISL97519AIUZ-EVALZ, a step-up voltage regulator that operates with high frequency and high efficiency. This evaluation kit is designed to deliver over 90% efficiency. Step 1: Connect the power supply between the headers of VIN and GND. The positive output of the power supply should be connected to the VIN header. Set the power supply voltage between 2.3V and 5V, and the current limit at 3A. The ISL97519AIUZ-EVALZ kit provides a dip switch that allows users to select either 600kHz or 1.2MHz switching frequency. Step 2: Connect the E-load between the headers of VOUT and GND. The positive input of the E-load should be connected to the VOUT header. Set the E-load current. The load current should not exceed the maximum output current that the part can supply. Key Features • A Complete Evaluation Platform for Evaluation of ISL97519A • Input Voltage: 2.3V to 5.5V • Proven Evaluation Board Layout • Pb-free (RoHS Compliant) Step 4: Close pins 2 and 3 of S1 to tie the EN pin to VIN in order to enable the part. To disable the part, open pins 2 and 3 in order to pull EN to ground with R3 to disable the part. Pin Configuration ISL97519A (8 LD MSOP) TOP VIEW COMP 1 Make sure all the connections on the evaluation board are correct, then turn on the power supply and E-load. The part will start to operate. 8 SS FB 2 7 FSEL EN 3 6 VDD GND 4 Maximum Output Current The MOSFET current limit is normally 2.0A and guaranteed at 1.7A. This restricts the maximum output current that the ISL97519A can drive. Table 1 shows the ISL97519AIUZ-EVALZ maximum output current, IOMAX at different input and output voltages. 5 LX Ordering Information PART # ISL97519AIUZ-EVALZ July 1, 2011 AN1645.0 TABLE 1. TYPICAL MAXIMUM OUTPUT CURRENT DESCRIPTION Evaluation Board for ISL97519A 1 Step 3: Close pins 1 and 4 of S1 to tie the FSEL pin to VIN. This will set the switching frequency to 1.2MHz. Open pins 1 and 4 to pull FSEL to ground with R4 to set the frequency to 600kHz. VIN (V) VOUT (V) IOMAX (mA) 2.5 5 870 2.5 9 500 2.5 12 380 3.3 5 1150 3.3 9 655 3.3 12 500 5 9 990 5 12 750 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas Inc. 2011. All Rights Reserved Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. Application Note 1645 Board Design Schematic FIGURE 1. SCHEMATIC 2 AN1645.0 July 1, 2011 Application Note 1645 Evaluation Board Layout FIGURE 2. EVB ASSEMBLY LAYER 3 AN1645.0 July 1, 2011 Application Note 1645 Evaluation Board Layout (Continued) FIGURE 3. TOP LAYER 4 AN1645.0 July 1, 2011 Application Note 1645 Evaluation Board Layout (Continued) FIGURE 4. BOTTOM LAYER 5 AN1645.0 July 1, 2011 Application Note 1645 TABLE 2. ISL97519AIUZEVALZ BILL OF MATERIALS (BOM) ITEM QTY REFERENCE PART DESCRIPTION PCB FOOTPRINT PART NUMBER 1 1 C4 27nF 603 TDK 2 1 C6 4700nF 603 TDK 3 1 C2 0.1µF/16V 603 4 1 R1 86.6k 603 5 3 R2, R4, R5 10k 603 6 1 R3 1k 603 8 1 C3 22µF 1206 9 1 C1 22µF 1206 10 1 L1 10µF CDRH8D43-100NC 11 1 U1 ISL97519A MSOP-8 12 1 VOUT (12V) CON1 Powerpost 13 1 VIN (3.3V) CON1 Powerpost 14 1 GND IN CON1 Powerpost 15 1 D1 SS25 DO-214A 16 1 S1 SWDIP-2 DIP4 C1068X7R1H104K VENDOR TDK WALSIN WR06W1002JTL WALSIN MURATA GRM31CR61C226KE15L MURATA SUMIDA ISL97519A INTERSIL SS25 Fairchild CKN3001-ND Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that the Application Note or Technical Brief is current before proceeding. For information regarding Intersil Corporation and its products, see www.intersil.com 6 AN1645.0 July 1, 2011