Application Note 1522 ISL9104xxxxEVAL1Z, ISL9104AxxxxEVAL1Z Evaluation Board Application Manual Description The ISL9104 evaluation kit provides a test platform for the ISL9104 4.3MHz low quiescent current, high efficiency integrated step-down regulator. The ISL9104 is capable of delivering 500mA output current. For adjustable output option, the output voltage can be programmed through the external feedback resistors R1 and R2 on the board (on board the default output voltage is set to be 1.6V but it can be programmed for the range of 0.8V to VIN). It is also offered in many fixed output voltage options including 1.2V, 1.5V, 1.8V, 2.0V, 2.5V, 2.8V and 3.3V. The complete ISL9104 regulator is located at the center of the board. On the left side of the board are the connectors for the input power source (VIN and GND). The output connectors are located on the right side (VO and GND). Jumper JP1 allows the user to enable or disable the IC. The evaluation board schematic, layout and bill of materials (BOM) can be found at the end of this application note. Pinout ISL9104 (6 LD 1.6x1.6 µTDFN) TOP VIEW 6 SW VIN 1 EN 5 GND 2 NC 3 4 FB Recommended Operating Conditions • Input voltage: from 2.7V or (VOUT + VDROP) whichever is higher to 6.0V. Here VDROP = ILOAD*(rDSON_PFET+RL). rDSON_PFET is the ON-resistance of the high-side power P-MOSFET and RL is the DCR of the inductor. • Loading current: 0mA ~ 500mA • Ambient temperature range: -40°C ~ +85°C NOTE: For the fixed output options, the output voltage is pre-set in the factory. For the adjustable output options, the output voltage can be programmed through the external resistor network from VOUT to FB to GND, where VOUT = 0.8V*(1+R2/R1), please refer to ISL9104, ISL9104A data sheet FN6829 for recommended component values. On board, the default output voltage is set at 1.6V for the adjustable output options. Setup Guide 1. Place shunt on JP1 at the position of “Enable” to enable the device. Put shunt on JP1 at the position of “Disable” will disable the device. 2. Connect the DC power supply between VIN and GND connectors. Make sure the power supply has enough supply current capability. Do not adjust the VIN higher than the recommended maximum supply voltage (6.0V). 3. Connect the output to a load (resistor or electronic load). 4. Turn on the input power supply and evaluate the device. Ordering Information Features • A Complete Evaluation Platform for ISL9104, ISL9104A PART NUMBER DESCRIPTION ISL9104IRUNEVAL1Z Evaluation Board for ISL9104IRUNZ-T (3.3V) • Pb-Free (RoHS Compliant) ISL9104IRUJEVAL1Z Recommended Equipment Evaluation Board for ISL9104IRUJZ-T (2.8V) ISL9104IRUFEVAL1Z Evaluation Board for ISL9104IRUFZ-T (2.5V) ISL9104IRUDEVAL1Z Evaluation Board for ISL9104IRUDZ-T (2.0V) ISL9104IRUCEVAL1Z Evaluation Board for ISL9104IRUCZ-T (1.8V) ISL9104IRUBEVAL1Z Evaluation Board for ISL9104IRUBZ-T (1.5V) ISL9104IRUWEVAL1Z Evaluation Board for ISL9104IRUWZ-T (1.2V) ISL9104IRUAEVAL1Z Evaluation Board for ISL9104IRUAZ-T (Adjustable) • Convenient Jumpers for Enable/Disable Operation The following instruments are recommended for testing: • Power supplies: DC 6.5V/1A • Electronic load: 0mA to 500mA • Multimeters • Function generator • Oscilloscope • Cables and wires March 15, 2010 AN1522.1 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2010. All Rights Reserved All other trademarks mentioned are the property of their respective owners. Application Note 1522 Ordering Information (Continued) PART NUMBER DESCRIPTION ISL9104AIRUNEVAL1Z Evaluation Board for ISL9104AIRUNZ-T (3.3V) ISL9104AIRUJEVAL1Z Evaluation Board for ISL9104AIRUJZ-T (2.8V) ISL9104AIRUFEVAL1Z Evaluation Board for ISL9104AIRUFZ-T (2.5V) ISL9104AIRUDEVAL1Z Evaluation Board for ISL9104AIRUDZ-T (2.0V) ISL9104AIRUCEVAL1Z Evaluation Board for ISL9104AIRUCZ-T (1.8V) ISL9104AIRUBEVAL1Z Evaluation Board for ISL9104AIRUBZ-T (1.5V) ISL9104AIRUWEVAL1Z Evaluation Board for ISL9104AIRUWZ-T (1.2V) ISL9104AIRUAEVAL1Z Evaluation Board for ISL9104AIRUAZ-T (Adjustable) 2 AN1522.1 March 15, 2010 Application Note 1522 Evaluation Board Schematic U1 J1 1 VIN VIN TP1 SW 6 L1 J3 1µH JP1 2 EN VOUT GND 5 R1 100k C1 4.7µF/6.3V 3 NC C3 47pF FB 4 C2 4.7µF/6.3V ISL9104, ISL9104A R2 100k J2 J4 GND GND NOTE: FOR THE FIXED OUTPUT VOLTAGE OPTIONS, R1 = 0, C3 AND R2 NOT POPULATED FIGURE 1. ISL9104, ISL9104A EVALUATION BOARD SCHEMATIC 3 AN1522.1 March 15, 2010 Application Note 1522 Bill of Materials (BOM) ITEM QTY REFERENCE 1 1 U1 2 2 C1, C2 3 1 4 PART DESCRIPTION PCB FOOTPRINT PART NUMBER ISL9104 or ISL9104A 1.6x1.6 6 Ld µTDFN VENDOR NOTE Intersil Capacitor, SMD, 4.7µF, 10%, X5R 0603 GRM188R60J475KE19D Murata C3 Capacitor, SMD 47pF, 5%, X7R 0402 GRM36COG470J050AQ Murata 1 R1 Resistor, SMD, 100kΩ, 1%, 0.1W 0402 ERJ2RKF1003 5 1 R1 Resistor, SMD, 0Ω 0402 Generic Generic 6 1 R2 Resistor, SMD, 100kΩ, 1% 0402 ERJ2RKF1003 Panasonic Only populated for boards with part numbers ISL9104IRUAEVAL1Z and ISL9104AIRUAEVAL1Z. For boards with other part numbers, it is unpopulated. 7 1 L1 Inductor, 1µH L1207C1R0MPWS KEMET 8 4 VIN, VO, GND(x2) 9 1 10 1 Only populated for boards with part numbers Panasonic ISL9104IRUAEVAL1Z and ISL9104AIRUAEVAL1Z. For boards with other part numbers, it is unpopulated. Connector - 3156-1-00-15-00-00-08-0 Mill-Max TP1 Scope Probe Test Point - 131503100 Tektronix JP1 Connect Header, 1X3 - 68000-236-1X3 BERG/FCI 4 Populated for all boards with other part numbers EXCEPT ISL9104IRUAEVAL1Z and ISL9104AIRUAEVAL1Z Not populated AN1522.1 March 15, 2010 Application Note 1522 PCB Layout FIGURE 2. TOP SILK LAYER 5 AN1522.1 March 15, 2010 Application Note 1522 PCB Layout (Continued) FIGURE 3. BOTTOM SILK LAYER 6 AN1522.1 March 15, 2010 Application Note 1522 PCB Layout (Continued) FIGURE 4. TOP LAYER 7 AN1522.1 March 15, 2010 Application Note 1522 PCB Layout (Continued) FIGURE 5. BOTTOM LAYER 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 8 AN1522.1 March 15, 2010