Evaluates: MAX8655/MAX8688 19-4331 Rev 0 10/08 MAX8655 Evaluation Kit General Description Features The MAX8655 evaluation kit (EV kit) is a fully assem- 10.8V to 13.2V Input-Voltage Range bled and tested surface-mount PCB that contains 20A Maximum Output Current (Additional Airflow a fixed-frequency, pulse-width modulated (PWM) step- or Heat Sink May be Required Above 13A of down switching regulator. The MAX8655 EV kit provides a 1.2V output voltage from a 10.8V to 13.2V Output Current) input source and delivers up to 20A output current. Adjustable Output from 0.7V to 5.5V The MAX8655 IC features internal high-side and low- Internal High-Side and Low-Side Power MOSFETs side power MOSFETs. A reference input is provided for use with a high- 200kHz to 1MHz Adjustable Switching Frequency accuracy external reference (REFIN) or for DDR and and SYNC Input tracking applications. The MAX8655 EV kit operates at SYNCO Synchronizes 2nd Regulator 180 Out-of- 600kHz. The MAX8655 IC has a programmable internal Phase oscillator with frequency range from 200kHz to 1MHz. The MAX8655 can also be synchronized to an external Monotonic Startup Provides Safe Starting Into a clock by connecting the clock signal to FSYNC. A syn- Pre-Biased Output chronization output (SYNCO) is provided to synchro- Enable Input and Power-OK Signals nize a second MAX8655 180 out-of-phase with the first by connecting SYNCO of the first MAX8655 to FSYNC Low-Profile Components of the second. Lead-Free and RoHS Compliant Fully Assembled and Tested Ordering Information PART TYPE MAX8655EVKIT+ EV Kit +Denotes lead-free and RoHS compliant. Component Lists MAX8655 Circuit DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION C1 1 N ot ins tall ed , ceram i c capac i tor ( 1210) 0.47F, 10V X5R ceramic capacitors C13, C17 2 (0402) 10F, 25V X5R ceramic capacitors Murata GRM155R61A474KE15 C2, C3, C4 3 (1210) 1F 20%, 10V X5R ceramic Murata GRM32DR61E106KA12B C14 1 capacitor (0603) 2.2F 20%, 10V X5R ceramic Murata GRM188R61A105KA61 C6 1 capacitor (0603) Murata GRM188R61A225KE34 1000pF 10%, 50V ceramic capacitor C15 1 (0603) C6A1, C7A, 0 Not installed, ceramic capacitors Murata GRM188R71H102KA01 C8A 0.022F, 50V X5R ceramic capacitor 0.22F, 10V ceramic capacitor (0603) C16 1 (0402) C7 1 Murata GRM188R71A224KA01 Murata GRM155R71H223KA12D 0.22F, 25V X7R ceramic capacitor 100pF, 50V X7R ceramic capacitor C8 1 (0603) C18 1 (0402) Murata GRM188R71E224KA88D Murata GRM1555C1H101JZ01 100F, 6.3V X5R ceramic capacitors 470pF, 50V ceramic capacitor (0402) C19 1 C9C12 4 (1210) Murata GRM155R71H471KA01 Murata GRM32ER60J107ME20 C20, R1 0 Not ins tal l ed, cer am i c cap acito rs ( 0 402) Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.MAX8655 Evaluation Kit Component Lists (continued) MAX8655 Circuit DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION SMD Schottky diode R5, R9, R14 0 Not installed, resistors (0402) D1 1 Central Semi CM0SH-3 BK R6 1 357 1% resistor (0402), lead-free Terminal blocks, 5mm R7 1 40.2k 1% resistor (0402), lead-free JP1, JP3, JP9 3 On Shore EDZ500/2DS R8 1 2.87k 1% resistor (0402), lead-free Digi-Key ED1975-ND R10 1 4.02k 1% resistor (0402), lead-free JP2, JP5, JP6, 4 2-pin headers, 0.1in R11 1 80.6k 1% resistor (0402), lead-free JP7 R12, R35 2 100k 1% res ist ors ( 04 02), l ea d - free JP4 1 4-pin header, 0.1in R13 1 56.2k 1% resistor (0402), lead-free JP8, JP10 2 3-pin headers, 0.1in R15 1 41.2k 1% resistor (0402), lead-free 0.56H, 1.8m, 27.5A inductor R16 1 51.1k 1% resistor (0402), lead-free L1 1 (11.5mm x 10.3mm x 4mm) R18 1 10 1% resistor (0402), lead-free Vishay IHLP-4040DZ-ERR56M01 R2, R17 2 0 1% resistors (0402), lead-free Synchronous-PWM buck regulator (56 TQFN-EP*) U1 1 R3 1 3.3 1% resistor (1206), lead-free Maxim MAX8655ETN+ R4 1 681 1% resistor (0402), lead-free *EP = Exposed pad. MAX8688 CircuitNot Installed DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION C201, C202, 100nF 10%, 50V X7R ceramic R201, R204, C203, C205, capacitors (0603), open 0 R206, R208, 0 Resistors, open (0402) C206, C207 Murata GRM188R71H104KA93 R209, R214 1F 10%, 10V X5R ceramic R202 0 0 resistor (0603) C204 0 capacitor (0603), open R203 0 1k 1% resistor (0402), open Murata GRM188R61A105KA61 R205, R207, 0 33k 1% resistors (0402), open 2.2F 10%, 10V X5R ceramic R210 C208 0 capacitor (0603), open R211 0 300 5% resistor (0603), open Murata GRM188R61A225KE34 R212 0 499 1% resistor (0603) C209 0 Ceramic capacitor, open R213 0 100k 1% resistor (0603), open 0.47F 10%, 10V X5R ceramic R215 0 10k 1% resistor (0402), open C210 0 capacitor (0603), open Murata GRM188R61A474KA61 R216, R217 0 100 1% resistors (0402), open Digital power-supply controller, open JP201 0 4-pin header, open U201 0 Maxim MAX8688+ JP202, JP203, 0 3-pin headers, open U202 0 AT24C01A-10TSU-1.8, open JP204 Voltage regulator (SOT-223) R19 0 100k 1% resistor, open (0402) U203 0 NS LM317EMP Component Suppliers SUPPLIER PHONE WEBSITE Central Semiconductor 631-435-1110 www.centralsemi.com Digi-Key Corp. 800-344-4539 www.digikey.com Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com Vishay 402-563-6866 www.vishay.com Note: Indicate that you are using the MAX8655 when contacting these component suppliers. 2 Evaluates: MAX8655/MAX8688