Application Note 1909 Author: Billy Yang ISL8130EVAL2Z - User Guide Introduction The ISL8130 is a wide input range, synchronous buck controller. It is designed to drive N-Channel MOSFETs in a synchronous rectified buck topology for up to 25A load current. The ISL8130 integrates control, output adjustment, monitoring and protection functions into a single package. All the necessary components are with a 2.125 inch by 1.25 inch PCB area. The ISL8130EVAL2Z provides simple, voltage mode control with fast transient response. The 0.6V internal reference as well as external reference can be selected via the REFIN pin. TABLE 2. RECOMMENDED COMPONENT SELECTION FOR QUICK EVALUATION VOUT IOUT (V) (A) TABLE 1. EVALUATION BOARD ELECTRICAL SPECIFICATIONS SPEC VIN DESCRIPTION MIN TYP MAX UNIT LOWER MOSFET INDUCTOR FSW/RT (kHz/kΩ) 5 25 2X 2X BSC057N03 BSC057N03 LS LS SER2010-901ML 280/52.3 5 15 1X 1X BSC057N03 BSC030N03 LS LS SER2009-901ML 500/31.6 3.3 25 2X 2X BSC057N03 BSC030N03 LS LS SER2010-901ML 280/52.3 3.3 15 1X 1X BSC057N03 BSC030N03 LS LS SER2009-901ML 500/31.6 The ISL8130 is offered in a space saving 4x4 QFN and easy-to-use 20 Ld QSOP packages. Evaluation Board Specifications UPPER MOSFET Please contact Intersil Sales for assistance. Input Voltage 5.6 12 16 V VOUT Output Voltage 4.75 5.0 5.25 V Recommended Equipment IOUT Output Current 25 A The following equipment are recommended for evaluation: Fsw Switching Frequency 280 kHz η Efficiency, VIN = 12V, IOUT = 25A 94 % • 0V to 30V power supply with 30A source current capability • Electronic load capable of sinking 25A • Digital Multimeters (DMMs) • 100MHz Quad-Trace Oscilloscope Quick Test Setup 1. Ensure that the Eval board is correctly connected to the power supply and the electronic load prior to apply any power. Please refer to Figure 2 for proper set-up. 2. Connect jumpers J1 to the Internal Reference position; Connect jumper J8 to the Disable position. 3. Turn on the power supply, VIN = 12V. The PWM should be inhibited at this time. 4. Connect jumper J8 to the Enable position. Adjust input voltage VIN within the specified range and observe output voltage. The output voltage variation should be within 4.75V to 5.25V. 5. Adjust load current within 25A. The output voltage variation should be within 4.75V to 5.25V. 6. Use oscilloscope to observe output ripple voltage and phase node ringing. For accurate measurement, please refer to Figure 3 for proper probe set-up. FIGURE 1. PHOTOGRAPH OF THE ISL8130EVAL2Z EVALUATION BOARD 7. Optimization. Please refer to Table 2 for optimization recommendation. NOTE: Test points: VOUT, GND, GND, VIN are for voltage measurement only. Do not allow high current through these test points. December 20, 2013 AN1909.0 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2013. 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 1909 FIGURE 2. ISL8130EVAL2Z TEST SET-UP Probe Set-up OUTPUT CAP OUTPUT OUTPUT CAP CAP OR ORMOSFET MOSFET FIGURE 3. OSCILLOSCOPE PROBE SET-UP External Reference If REFIN pin is tied to VCC5, then the internal 0.6V reference is used as the error amplifier non-inverting input. If the REFIN is connected to an external voltage source between 0.6V to 1.25V, then this external voltage is used as the reference voltage at the positive input of the error amplifier. 2 AN1909.0 December 20, 2013 Application Note 1909 Typical Performance Curves Input voltage is 12V and output voltage is 5V unless otherwise specified. 98 4.982 96 4.981 92 VOUT (V) EFFICIENCY (%) 94 90 88 4.980 4.979 86 84 4.978 82 80 0 2 4 6 8 10 12 14 16 18 20 22 24 26 4.977 FIGURE 4. EFFICIENCY vs LOAD CURRENT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 LOAD CURRENT (A) LOAD CURRENT (A) FIGURE 5. LOAD REGULATION, (V IN = 12V, I MAX = 25A) IOUT VOUT VOUT PH FIGURE 6. OUTPUT RIPPLE (VO = 5V, LOAD = 25A) FIGURE 7. OVERCURRENT PROTECTION (VO = 5V, LOAD = 40A) VOUT IOUT VOUT VIN ILOAD FIGURE 8. SOFT-START AT FULL LOAD 3 FIGURE 9. LOAD TRANSIENT (25% TO 50% AT 2A/µs) AN1909.0 December 20, 2013 Application Note 1909 ISL8130EVAL2Z Schematic P6 VC C5 1 1 VI N C 18 C20 10uF 470uF J5 2 C9 10uF 2 C7 10uF 2 1 2 R8 1. 21K 1 R E FO UT 2 2 C8 10u F R10 100 K 1 1 2 REFO UT J4 VI N 1 I N T. R E F J1 3 1 2 P7 1 1 1 C 12 2. 2uF 2 E XT . REF 1 P8 Ext . REF 1 Q1 BSC 057N03LS G ND P5 1 1 1 C4 10uF 1 is l8130 EN SS PGOO D R17 C 13 0. 1uF 1 2 2 C 30 C 24 D NP D NP 2 2 1 1 100K C 33 E N/ SS GN D C26 D NP DNP VC C5 R1 R11 12 1K 0 2 N 1624618 5 1 2 2 1 2 2 1 C10 0. 47uF R4 16. 5K R3 1k 1 C3 2 2 1 470pF 1 2 3 2 1 BSC 057 N03LS 1 RPG D IS AB LE 1 P4 1 1 2 2 E NA BL E GN D 1000pF 1 1 1 J8 J7 1 C1 9 R18 51K 10uF C 17 1 U1 P9 C 29 1uF 1 BAT54C-V-G 2 2 1 2 CD EL C28 1uF C 27 22u C 32 D NP 180uF 2 PGN D PGOOD Q4 2 PG OO D 1 3 2 20 R2 30 .1K 1 C25 1 19 ENSS 1. 2 VOU T 1 1 LG ATE C15 DN P 2 R9 Q2 BSC 057N03LS D2 3 C OMP C1 1. 5nF 2 5 4 PVC C 1 PVC C C31 22u 180uF 2 PHASE FB C23 6 UGATE CD EL C2 10 0pF 1 2 RT J6 1 1 UG ATE 18 COMP 1 2 0. 22uF 2 2 1 2 2 1 SGN D R T 16 FB 17 2 C11 2 1 0 BOO T 15 R5 52. 3K 1 7 VI N R14 1 I SEN 14 2 PHASE 8 VCC 5 VOU T L1 0. 9u H 1 13 1 3 PHASE 1 VCC 5 VOU T 9 2 REFI N 1 OC SET NC 1 2 10 R EFOUT 12 C1 6 0. 1uF P3 1 2 11 VIN G ND BSC057N 03 LS C6 1000pF REFI N 2 2 Q3 4 AN1909.0 December 20, 2013 Application Note 1909 TABLE 3. ISL8130EVAL2Z BILL OF MATERIALS ITEM QTY PART REFERENCE VALUE DESCRIPTION PART NUMBER MANUFACTURER ESSENTIAL COMPONENTS 1 1 C3 470pF Ceramic CAP, NP0 or C0G, sm0603 GENERIC GENERIC 2 2 C13, C16 0.1µF Ceramic CAP, X5R, 50V, sm0603 GENERIC GENERIC 3 2 C4, C17 10µF Ceramic CAP, X5R, 10V, sm0805 GENERIC GENERIC 4 1 C10 0.47µF Ceramic CAP, X5R, 16V, sm0603 GENERIC GENERIC 5 3 C27, C31 22µF Ceramic CAP, X5R, 25V, sm1210 GENERIC GENERIC 6 1 C12 2.2µF Ceramic CAP, X5R, 16V, sm0603 GENERIC GENERIC 7 2 C6, C19 1000pF Ceramic CAP, NP0 or C0G, sm0603 GENERIC GENERIC 8 2 C23, C25 180µF OSCON, 16V, Radial 8x9 16SEPC180MX SANYO 9 4 C7, C8, C9, C20 10µF Ceramic CAP, X5R, 25V, sm1210 GENERIC GENERIC 10 1 C2 100pF Ceramic CAP, NP0 or C0G, sm0603 GENERIC GENERIC 11 2 C28, C29 Ceramic CAP, X5R, 25V,sm0603 GENERIC GENERIC 12 1 C1 1500pF Ceramic CAP, NP0 or C0G, sm0603 GENERIC GENERIC 13 1 C11 0.22µF Ceramic CAP, X5R, 16V,sm0603 GENERIC GENERIC 14 1 C18 470µF Alum. Cap, 50V 16SVPE470M SANYO 15 1 D2 Schottky Diode, 30V, SOT23 BAT54C Fairchild 16 1 L1 Inductor SER2010-901ML Coilcraft 17 4 Q1, Q2, Q3, Q4 Single Channel NFET, 30V BSC057N03LS G Infineon 18 1 R5 52.3k Resistor, sm0603, 1% GENERIC GENERIC 19 1 R9 1.2 Resistor, sm0603, 10% GENERIC GENERIC 20 1 R2 30.1k Resistor, sm0603, 1% GENERIC GENERIC 21 2 R11, R14 0 Resistor, sm0603, 10% GENERIC GENERIC 22 1 R4 16.5k Resistor, sm0603, 1% GENERIC GENERIC 23 1 R17 1 Resistor, sm0603, 10% GENERIC GENERIC 24 1 R18 51k Resistor, sm0603, 1% GENERIC GENERIC 25 1 R1 121k Resistor, sm0603, 1% GENERIC GENERIC 26 1 R8 1.21k Resistor, sm0603, 1% GENERIC GENERIC 27 1 R3 1k Resistor, sm0603, 1% GENERIC GENERIC 28 2 R10, RPG 100k Resistor, sm0603, 1% GENERIC GENERIC 29 1 U1 PWM CONTROLLER, 20 Ld QSOP ISL8130IAZ INTERSIL 1µF 0.9µH OPTIONAL COMPONENTS 30 6 C15, C24, C26, C30, C32, C33 DO NOT POPULATE EVALUATION HARDWARE 31 4 J4, J5, J6, J7 HARDWARE, MTG, CABLE TERMINAL, 6-14AWG, LUG&SCRE , ROHS KPA8CTP BERG/FCI 32 2 J1, J8 1x3 Header GENERIC GENERIC 33 7 P3, P4, P5, P6, P7, P8, P9 Test Points 1514-2 Keystone 5 AN1909.0 December 20, 2013 Application Note 1909 ISL8130EVAL2Z PCB Layout FIGURE 10. TOP SILKSCREEN 6 FIGURE 11. TOP LAYER AN1909.0 December 20, 2013 Application Note 1909 ISL8130EVAL2Z PCB Layout FIGURE 12. SECOND LAYER(SOLID GROUND) 7 (Continued) FIGURE 13. THIRD LAYER AN1909.0 December 20, 2013 Application Note 1909 ISL8130EVAL2Z PCB Layout FIGURE 14. BOTTOM LAYER (Continued) FIGURE 15. BOTTOM SILKSCREEN 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 AN1909.0 December 20, 2013