ISL6236 Evaluation Kit – System Regulation Application ® Application Note This application note describes the ISL6236 evaluation board intended for applications in notebook computers and other battery-powered devices. Description As notebook computer and battery-powered equipment complexity increases, higher levels of power management integration are required to meet market demands. To respond to the dynamic needs of its customers, Intersil introduces the quad outputs, multi-function power supply controller ISL6236. Its two fully programmable switch-mode power supplies (SPMS), one programmable and one fixed LDO outputs provide a robust power management solution for an extremely wide range of applications. In addition, it includes an optional 14V charge pump. For more information on the detailed workings of the ISL6236, please consult the ISL6236 Data Sheet on the Intersil Company website (http://www.intersil.com) December 22, 2008 AN1271.1 Quick Setup Guide 1. Set the +25V power supply to +7V and place in the “STANDBY” or “OFF” position. Connect the positive terminal (+) of the supply to the +VIN terminal P1 and the negative terminal (-) of the supply to GND P2. 2. Connect the positive terminal (+) of the electronic load to the VOUT1 terminal P5. Connect the negative terminal (-) of the electronic load to the GND terminal P6. Make sure the electronic load is set to the 0A condition. 3. Check to ensure all switches are in their default positions prior to application of power (refer to “Detailed Description of Switch Settings” on page 2). 4. Set all power supplies to the “ON” position. Check both 5V and 25V power supply outputs with a DMM to ensure correct voltage levels. Adjust if necessary. 5. Measure the default output voltages using DMM across the test points. •VOUT1: P7(+) to P8(-), it should read 5.0V •VOUT2: P5(+) to P6(-), It should read 3.3V What’s Inside The Evaluation Board Kit contains the following materials: •LDO: P3(+) to P4(-), It should read 5.0V •VREF3: P14(+) to P8(-), It should read 3.3V • ISL6236 EVAL1 REV A Board •CHARGE PUMP: P28(+) to P8(-), it should read 14.0V. • ISL6236 Data Sheet • ISL6236 Application Note (this document) At this point, the board has been properly powered up. Normal testing can begin. What’s Needed Summary The following materials will be needed to perform testing: The ISL6236EVAL1 is an adaptable evaluation tool which showcases the performance of the ISL6236 chipset designed to meet the power management requirements of personal notebook computers or portable devices. • +25V, 20A Power Supply • +5.0V, 750mA Power Supply • Electronic Load up to 15A The following pages provide jumper settings, pinout, schematic of the board, bill of materials and layout drawings to support implementation of this solution. • Precision digital multimeter • 4-Channel oscilloscope Note: amperage rating of power supplies are determined by maximum expected loading plus a percentage margin of error. The Intersil’s total power management portfolio continues to expand with new selections to better fit our customer’s needs. Refer to our web site for updated information: http://www.intersil.com For technical assistance or other assistance please call 1-888-INTERSIL (468-3774). 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. 2008. All Rights Reserved All other trademarks mentioned are the property of their respective owners. Application Note 1271 How to Change Output Settings Detailed Description of Switch Settings Use following tables to change the adjustable outputs. TABLE 4. TABLE 1. VOUT1 5V 1.5V 0.7V to 5.5V FUNCTION FB1 = GND, Default FB1 = VCC VFB*(1 + R11/R12) where VFB = 0.7V SW1 EN2 1 GND VOUT2 shut down 2 VCC* VOUT2 Active 3 REF VOUT2 sequence to Vout1 TABLE 5. TABLE 2. VOUT2 FUNCTION SW2 SKIP FUNCTION 1 GND Normal operational mode, automatic switch over to Pulse Skipping at light load FUNCTION 3.3V REFIN2 = VCC, Default 1.05V REFIN2 = VREF3 2 VCC* Low Noise, fixed-frequency PWM VREFIN2, where VREFIN2 = 0.5 to 2.5V 3 REF Normal Operation Mode with Ultrasonic Pulse-skipping, 20kHz min. 0.5V to 2.5V TABLE 3. LDO 5V 3.3V 0.7V to 4.5V TABLE 6. FUNCTION LDOREFIN = GND, Default LDOREFIN = VCC 2xVLDOREFIN, where VLDOREFIN = 0.35V to 2.25V SW3 EN_LDO FUNCTION 1 GND LDO shut down 2 VCC* LDO Active 3 N/C No Connect TABLE 7. SW4 BYP FUNCTION 1 GND Set BYP to 0V, No LDO switchover 2 VOUT1* Bypasses LDO Voltage with VOUT1 3 VOUT2 Bypasses LDO Voltage with VOUT2 TABLE 8. SW5 EN1 FUNCTION 1 GND Vout1 Shutdown 2 VCC* Vout1 Active 3 REF Vout1 sequence to Vout2 NOTE: * Indicates default settings. For all switches, only toggle one position at a time and use break-before-make sequencing to avoid shorting VCC to GND. 2 AN1271.1 December 22, 2008 Application Note 1271 Pinout REFIN2 ILIM2 OUT2 SKIP# POK2 EN2 UGATE2 PHASE2 ISL6236 (32 LD 5X5 QFN) TOP VIEW 32 31 30 29 28 27 26 25 VCC 3 22 PGND EN_LDO 4 21 GND VREF3 5 20 SECFB VIN 6 19 PVCC LDO 7 18 LGATE1 LDOREFIN 8 17 BOOT1 9 10 11 12 13 14 15 16 PHASE1 LGATE2 UGATE1 23 EN1 2 POK1 TON ILIM1 BOOT2 FB1 24 OUT1 1 BYP REF ISL6236 Evaluation Board Top and Bottom View (P4) (P4) (P5) (P6) (P14) VOUT1 GND VREF3 (P3) Charge Pump GND LDO ISL6236 Controller (P1) VIN (P2) GND (P7) (P8) VOUT2 GND (P29) PVCC FIGURE 1. ISL6236EVAL1 REV B EVALUATION BOARD TOP AND BOTTOM VIEW 3 AN1271.1 December 22, 2008 ISL6236EVAL1-Kit Schematic 4 Application Note 1271 AN1271.1 December 22, 2008 FIGURE 2. ISL6236EVAL1 REV A KIT SCHEMATIC Application Note 1271 Components List: REF DES PART NUMBER QTY MANUFACTURER DESCRIPTION C1, C7, C8 08053D105KAT2A 3 AVX 1µF, 25V, X7R, 0805 C11 H1065-00475-10V10 1 GENERIC 4.7µF, 10V, X5R, 1206 C14, C16 TMK432BJ106KM 2 TAIYO-YUDEN 10µF, 25V, X5R, 1210 C2, C4, C5, C6, C10, C12, C13, C23, C24, C26 H1046-00104-50V10 GENERIC 0.1µF, 50V, X7R, 0805 C27, C28 OPEN 0 - - C29, C30 6TPD330M 2 POSCAP SANYO 330µF, 6.3V, POS CAP 9mΩ, D size C3, C9, C15, C17, C18, C19 OPEN 0 - - C31, C32 OPEN 0 POSCAP - D1, D4-D6 OPEN 0 DIODES-INC - D2, D3 OPEN 0 ON-SEMI - D7, D8 BAT54sST 2 DIODES 0.2A, 30V, Schottky SOT23 D9 BAT54WT1-T 1 ON-SEMI 2A, 30V, Schottky SOT23 L1, L2 SD1003 2 FALCO 4.7µH, 7mΩ, 12.5x12.5mm Shielded P1, P2, P5 to P8 1514-2 6 KEYSTONE Test Point Turret 0.150 Pad 0.100 Thole P19-P23 131-4353-00 5 TEKTRONIX Scope Probe Test Point PCB Mount P3, P11, P12, P14 to P18, P24, P26 to P29 5000 KEYSTONE Miniature Red Test Point 0.100 Pad 0.040 Thole P4, P30 5001 2 KEYSTONE Miniature Black Test Point 0.100 Pad 0.040 Thole Q1 IRF7821 1 IR 30V, 13.6A HEXFET Power MOSFET Q2 IRF7832 1 IR 30V, 20A HEXFET Power MOSFET Q3 IRF7807V 1 IR 30V, 8.3A N-Channel Power MOSFET Q4 IRF7811AV 1 IR 30V, 10.8A N-Channel Power MOSFET R1, R8 H2512-00010-1/8W 2 GENERIC 1Ω, 1%, 0805 R15 H2512-01503-1/10W1 1 GENERIC 150kΩ, 1%, 0805 R2, R7, R9, R11, R13, R14, R18, R19, R20, R22, R23, R27, R34 OPEN - - R25, R26 OPEN - - R3, R10, R12, R17, R21, R24, R30, R31 H2512-00R00-1/10W GENERIC 0Ω, 1%, 0805 R32 H2512-03922-1/10W1 1 GENERIC 39.2kΩ, 1%, 0805 R4, R5, R16, R33 H2512-02003-1/10W1 4 GENERIC 200kΩ, 1%, 0805 R6 H2512-025R5-1/8W1 1 GENERIC 25.5Ω, 1%, 0805 SW1 to SW5 78B03S 5 GRAYHILL Dip Switch SPST (Raised Slide) U1 ISL6236IRZA 1 INTERSIL High-Efficiency, Quad Output Controller 10 13 0 5 0 8 AN1271.1 December 22, 2008 Application Note 1271 Layout FIGURE 3. TOP COMPONENTS FIGURE 4. TOP ETCH FIGURE 5. 2nd LAYER FIGURE 6. 3rd LAYER 6 AN1271.1 December 22, 2008 Application Note 1271 Layout (Continued) FIGURE 7. BOTTOM COMPONENTS (MIRRORED) FIGURE 8. BOTTOM ETCH (MIRRORED) 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 7 AN1271.1 December 22, 2008