Evaluates: MAX8654/MAX8688 19-0643 Rev 1 10/08 MAX8654 Evaluation Kit General Description Features Internal 26m R MOSFETs The MAX8654 evaluation kit (EV kit) is a fully assembled DS(ON) and tested PCB that demonstrates the capabilities of Guaranteed 8A Output Current the MAX8654 integrated 8A step-down regulator. The Adjustable Over-Current Protection, 6A to 12A EV kit generates a 3.3V output voltage at load currents 1% Output Accuracy Over Load, Line, and up to 8A from a 4.5V to 14V input voltage range. The Temperature MAX8654 switches at 500kHz and provides over 93.4% efficiency with the supplied components. Operates from 4.5V to 14V Supply Adjustable Output from 0.6V to 0.85 x V IN Soft-Start Reduces Inrush Supply Current 250kHz to 1.2MHz Adjustable Switching or SYNC Input Component Suppliers Compatible with Ceramic, Polymer, and Electrolytic Output Capacitors SUPPLIER PHONE WEBSITE SYNCOUT Synchronizes 2nd Regulator 180 Out-of-Phase M urata E l ectroni cs 770-436-130 0 www .m ur at a-no rth amer ic a.com N orth Amer i ca, Inc. 36-Pin 6mm x 6mm TQFN Package Taiyo Yuden 800-348-2 496 www.t-yuden.com Ordering Information TDK Corp. 847-803-6 000 www.component.tdk.com PART TEMP RANGE IC PACKAGE TOKO America, Inc. 847-297-0 070 www.tokoam.com 36 TQFN Note: Indicate that you are using the MAX8654 when contact- MAX8654EVKIT+ 0C to +70C (6mm x 6mm) ing these component suppliers. +Denotes a lead-free and RoHS-compliant EV kit. Component Lists MAX8654 Circuit DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION 10F 20%, 16V X5R ceramic 1000pF, 50V C0G ceramic C1A, C1B, C1C 3 capacitors (1206) C8 1 capacitor (0402) Taiyo Yuden EMK316BJ106M Murata GRM1555C1H1D2TADI 1F 10%, 6.3V X5R ceramic 4.7F 10%, 16V X5R ceramic C2 1 capacitor (0402) C9 1 capacitor (0603) Murata GRM155R60J105K Murata GRM21BR61C475K 0.01F 10%, 50V X7R ceramic 0.22F,16V Y5R ceramic capacitor C3, C11 2 capacitors (0402) (0402) C10 1 Murata GRM155R71H103K Taiyo Yuden EMK105BJ224MV-F 0.22F 20%, 16V X7R ceramic 470pF 10%, 50V X7R ceramic C4 1 capacitor (0603) C12 1 capacitor (0402) TDK C1608X7R1C224M Murata GRM155R71H471K 22F 20%, 6.3V X5R ceramic 0.1F 10%, 10V X7R ceramic capacitors (1206) capacitor (0402) C5A, C5B, C5C 3 C13 1 TDK C3216X5R0J226M Murata GRM155R61A104K 6800pF 10%, 50V X7R ceramic 0.22F 20%, 50V X5R ceramic C6 1 capacitor (0402) C14, C15 2 capacitors (0805) Murata GRM155R71H682KA88 Taiyo Yuden UMK212BJ224M 0.022F, 10V X7R ceramic Not installed, 0.01F 10%, 25V X7R capacitor (0402) ceramic capacitor (0402) C7 1 C16 0 Murata GRM155R71C223CKA0I Murata GRM155R71E103K Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.MAX8654 Evaluation Kit Component Lists (continued) MAX8688 CircuitNot Installed DESIGNATION QTY DESCRIPTION MAX8654 Circuit R201, R204, DESIGNATION QTY DESCRIPTION R206, R208, 0 Resistors, open JP1JP7, R209, R214 0 Not installed JP9JP13 R202 0 0 resistor (0402) JU1, JU2, JU4 3 2-pin headers R203 0 1k 1% resistor (0402), open JU3 1 3-pin header R205, R207, 0 33k 1% resistors (0402), open 1H, 7.9m, 12A inductor (7.4mm x R210 L1 1 6.7mm x 3mm) R211 0 909 5% resistor (0603), open TOKO FDV0630-1R0M R213 0 100k 1% resistor (0402), open R1, R2, R10 3 100k 1% resistors (0402), lead free R215 0 10k 1% resistor (0402), open R3 1 1.5k 1% resistor (0402), lead free R216, R217 0 100 1% resistors (0402), open R4 1 332 1% resistor (0402), lead free U201 0 MAX8688+, open R5 1 15 5% resistor (0402), lead free U202 0 AT24C01A-10TSU-1.8, open R6 1 475 1% resistor (0402), lead free R7 1 75k 1% resistor (0402), lead free Quick Start R8 1 2.2 1% resistor (1206), lead free R9, R11 2 1k 1% resistors (0402), lead free Recommended Equipment R12 1 10 1% resistor (0402), lead free Before beginning, the following equipment is needed: 8A step-down regulator Up to 12V at +3A DC power supply or battery U1 1 Maxim MAX8654ETX+ Digital multimeter (DMM) 3 Shunts Up to 8A load 1 PCB: MAX8654 Evaluation Kit+ Ammeter (optional) Procedure MAX8688 CircuitNot Installed The MAX8654 EV kit is fully assembled and tested. DESIGNATION QTY DESCRIPTION Follow the steps below to verify board operation. C201, C202, 100nF 10%, 50V X7R ceramic Caution: Do not turn on the power supply until all con- nections are made. C203, C205, 0 capacitors (0603), open C206, C207 Murata GRM188R71H104K 1) Preset the DC power supply to 12V. Turn off the 1F 10%, 10V X5R ceramic power supply. C204 0 capacitor (0603), open 2) Ensure that there is a shunt on JU1 and JU2. Murata GRM188R61A105K 3) Ensure that there is a shunt on pins 1-2 of JU3. 2.2F 10%, 10V X5R ceramic C208 0 capacitor (0603), open 4) Connect the positive lead of the power supply to the Taiyo Yuden LMK107BJ225K VIN pad and connect the negative lead of the C209 0 Ceramic capacitor, open power supply to the GND pad on the EV kit. 0.47F 10%, 10V X5R ceramic 5) Connect the positive lead of the DMM to the VOUT C210 0 capacitor (0603), open pad and connect the negative lead of the DMM to Murata GRM188R61A474K the GND pad on the EV kit. 3.3V 350mW zener diode (SOT23), 6) Turn on the power supply. D1 0 open 7) Verify that the voltage at VOUT is approximately Central Semiconductor CMPZ4620 3.3V. JP201 0 4-pin header, open 8) Connect the load between VOUT and GND. JP202, JP203, 0 3-pin header, open JP204 9) Verify that the voltage at VOUT is approximately R19 0 100k resistor, open 3.3V. 2 Evaluates: MAX8654/MAX8688