MAX1649EVKIT-SO+

19-1293; Rev 1; 11/07 MAX1649 Evaluation Kit The MAX1649 evaluation kit (EV kit) provides a regulated 5V output voltage from a 5.5V to 16.5V source. The circuit is configured to deliver up to 1.5A of output current using all surface-mount components. The MAX1649’s low quiescent current and unique currentlimited PFM control scheme provide high efficiency over a wide range of load currents. The MAX1649 EV kit can also be used to evaluate the MAX1651 (3.3V output), MAX649, MAX651, and MAX652. However, the MAX1649/MAX1651 are improved versions of the MAX649/MAX651, and are recommended for new designs. Features ♦ +5.5V to +16.5V Input Supply Range ♦ Over 90% Efficiency for 10mA to 1.5A Loads ♦ 100µA (max) Quiescent Supply Current ♦ Fixed 5V or Optional Adjustable Output Voltage ♦ 1.5A Output Current Capability ♦ Fully Assembled and Tested Ordering Information Component List PART TYPE MAX1649EVKIT-SO+ EV Kit +Denotes lead-free and RoHS compliant. DESIGNATION QTY C1, C6 C2 C3, C4 DESCRIPTION 2 68µF, 20V ±20% tantalum capacitors (E-case) AVX TPSE686M020R0150 1 330µF, 10V ±10% tantalum capacitor (E-case) AVX TPSE337K010R0060 2 0.1µF ±10% ceramic capacitors (0805) Panasonic ECJ-3VB1H104K Component Suppliers SUPPLIER PHONE WEBSITE AVX 843-946-0238 www.avx.com Fairchild 888-522-5372 www.fairchildsemi.com International Rectifier 310-322-3331 irf.com IRC 361-992-7900 irctt.com 847-843-7500 www.niec.co.jp C5 0 Not installed, capacitor (1206) Nihon/NIEC C7 0 Not installed, capacitor (D-case) Panasonic 800-344-2112 www.panasonic.com Sumida Corp. 847-545-6700 www.sumida.com Vishay/Dale Resistors 402-564-3131 www.vishay.com D1 1 Schottky diode Nihon NSQ03A03L JU1 1 3-pin header JU3 0 Not installed, shorted by PC trace L1 1 47µH inductor Sumida CDRH125NP-470MC P1 1 p-channel MOSFET (8-pin SO-8) International Rectifier IRF7416PBF Fairchild NDS8435A_NL R1 1 0.050Ω ±1%, 0.5W resistor (2010) Dale WSL2010R0500FEA IRC LRC-LR2010LF-01-R050-F R2 0 Not installed, resistor (1206) R3 0 Not installed, resistor (1206)—shorted by PC trace U1 1 MAX1649CSA+ (8-pin SO-8) — 1 Shunt — 1 PCB: MAX1649 Evaluation Kit+ Note: Indicate that you are using the MAX1649 when contacting these component suppliers. _________________________Quick Start The MAX1649 EV kit is fully assembled and tested. Follow the steps below to verify board operation. Do not turn on the power supply until all connections are completed. 1) Connect a +5.5V to +16.5V power supply to the pad marked VIN. 2) Connect ground to the GND pad. 3) Connect a voltmeter and load (if any) to the VOUT pad. 4) For normal operation, place the shunt across pins 1 and 2 of jumper JU1. 5) Turn on the power supply and verify that the output voltage is 5V. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 Evaluates: MAX649/MAX651/MAX652/MAX1649/MAX1651 General Description Evaluates: MAX649/MAX651/MAX652/MAX1649/MAX1651 MAX1649 Evaluation Kit _______________Detailed Description Shutdown Control The MAX1649 provides a SHDN pin to disable the output. Table 1 lists the options available for shutdown control jumper JU1. An external controller can be used by removing the shunt on JU1 completely and connecting the external controller to the pad labeled SHDN. SHDN is a TTL/CMOS logic-level input. Output Voltage Adjustment The output voltage can be adjusted with minor modifications to the EV kit board. First, select output voltagedivider resistors R2 and R3 (refer to the Setting the Output Voltage section of the MAX1649 data sheet). Second, open jumper JU3 and resistor R3 by cutting the thin PCB trace between their pads. Finally, install R2 and R3. The standard output filter capacitor is rated at 10V. Use a higher-rated capacitor if necessary. When using the MAX1651 or when adjusting the output of either device, an input voltage below 5.5V is accept- able. However, the input voltage must be high enough to avoid dropout (refer to the Typical Operating Characteristics of the MAX1649/MAX1651 data sheet). Evaluating the MAX649/MAX651/MAX652 The MAX1649 EV kit can also be used to evaluate the MAX649/MAX651/MAX652. In addition to replacing the MAX1649 with a MAX649, change resistor R1 to 0.1Ω. Contact Maxim for free samples of the MAX649CSA, MAX651CSA, or MAX652CSA. Note that the MAX1649/ MAX1651 are recommended over the MAX649/ MAX651/MAX652 for new designs. Table 1. Jumper JU1 Functions SHUNT LOCATION SHDN PIN MAX1649 OUTPUT 1 and 2 Connected to GND MAX1649 enabled, VOUT = 5V 2 and 3 Connected to VIN Shutdown mode, VOUT = 0V VIN 5.5V TO 16.5V C1 68μF 20V C6 68μF 20V 6 5 SHDN OFF 3 JU1 1 ON V+ C4 0.1μF CS U1 3 2 1 3 2 4 C3 0.1μF GND R1 0.05Ω 1% MAX1649 EXT 7 4 SHDN REF P1 8 7 6 5 OUT 1 L1 47μH VOUT JU3 D1 8 GND FB 2 R3 SHORT (PCB TRACE) C2 330μF 10V R2 OPEN C5 OPEN Figure 1. MAX1649 EV Kit Schematic 2 _______________________________________________________________________________________ C7 OPEN MAX1649 Evaluation Kit Evaluates: MAX649/MAX651/MAX652/MAX1649/MAX1651 1.0" 1.0" Figure 2. MAX1649 EV Kit Component Placement Guide— Component Side Figure 3. MAX1649 EV Kit PCB Layout—Component Side 1.0" Figure 4. MAX1649 EV Kit PCB Layout—Solder Side _______________________________________________________________________________________ 3 Evaluates: MAX649/MAX651/MAX652/MAX1649/MAX1651 MAX1649 Evaluation Kit Revision History REVISION NUMBER REVISION DATE 0 10/97 Initial release 1 11/07 Update for RoHS compliance; update Component Suppliers list DESCRIPTION PAGES CHANGED — 1, 2, 3 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 4 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.