9-; Rev 0; /0 MAX9 Evaluation Kit General Description The MAX9 evaluation kit (EV kit) is a fully assembled and tested circuit board that contains two independent step-down DC-to-DC converter circuits. The MAX9 circuit is optimized for a V to.v input range and delivers.v at A. The MAX9 circuit is optimized for a.9v to 0V input range and delivers.v at A. Refer to the MAX9/MAX9 data sheet for component selection for higher current applications. DESIGNATION QTY DESCRIPTION C, C, C9, C C, C0 0.µF ±0%, 0V XR ceramic capacitors (00) Taiyo Yuden UMKBJ0MG 0µF ±0%, V aluminum electrolytic capacitors (0 x 0) Sanyo MV0AX C, C 0 Not installed capacitors (0 x ) C, C, C, C C, C, C C C C 0µF ±0%, aluminum electrolytic capacitors (0 x ) Sanyo 0MV0AX µf ±0%, XR ceramic capacitors (00) Taiyo Yuden LMKBJ0MG 00pF ±0%, 0V XR ceramic capacitor (00) Taiyo Yuden UMK0BMZ 0.0µF ±0%, 0V XR ceramic capacitor (00) Taiyo Yuden UMK0B0MZ.µF ±0%, XR ceramic capacitor (00) Taiyo Yuden LMKBJMG Features Lowest Cost Solution Up to 9% Efficiency Evaluates MAX9/MAX9 V to.v Input Range (MAX9 Circuit).V at A Output.9V to 0V Input Range (MAX9 Circuit).V at A Output Fully Assembled and Tested Ordering Information PART TEMP RANGE PIN-PACKAGE MAX9EVKIT 0 C to +0 C SO/0 µmax Component List DESIGNATION QTY DESCRIPTION D, D D, D L, L N, N 00mA, 0V Schottky diodes SOT Central Semiconductor CMPSH- 00mA, 0V Schottky diodes SOT Central Semiconductor CMSSH- µh,.a inductors Coilcraft TV-B or Transpower Technologies, Inc. LCI-.A, 0V dual N-channel MOSFETs, -pin SO Fairchild Semiconductor FDS9A R.kΩ ± resistor (00) R, R kω ± resistors (00) R kω ± resistor (00) R.0kΩ ± resistor (00) R kω ± resistor (00) R, R 0 Not installed resistors (00) R9 R 0Ω ± resistors (00) U MAX9ESA, -pin SO U MAX9EUB, 0-pin µmax None MAX9 PC board C9 µf ±0%, V, XR ceramic capacitor (00) TDK C0XRE0K Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at --9-, or visit Maxim s website at www.maxim-ic.com.
MAX9 Evaluation Kit SUPPLIER PHONE FAX WEBSITE Central Semiconductor --0 -- www.centralsemi.com Coilcraft -9-00 -9-9 www.coilcraft.com Fairchild Semiconductor -- 9-90-0 www.fairchildsemi.com Sanyo 9-- 9--0 www.sanyovideo.com Taiyo Yuden 00--9-9-099 www.t-yuden.com TDK -0-00 -90-0 www.component.tdk.com Transpower Technologies, Inc. --00 --0 Note: Please indicate that you are using the MAX9 when contacting these component suppliers. Quick Start The MAX9 EV kit is fully assembled and tested. Follow these steps to verify board operation. Do not turn on the power supply until all connections are completed. Required Equipment The following equipment is required before beginning: 0V, ADC power supply One voltmeter VOUT (MAX9) ) Connect a voltmeter to the VOUT pad. ) Connect a VDC to.vdc power supply to the VIN pad, with the voltage set to 0V. ) Connect the supply ground to the pad near VIN. ) Turn on the power supply and gradually increase the input voltage through the V to.v range. ) Verify that VOUT is.v throughout the V to.v input voltage range. VOUT (MAX9) ) Connect a voltmeter to the VOUT pad. ) Connect a.9vdc to 0VDC power supply to the VIN pad, with the voltage set to 0V. ) Connect the supply ground to the pad near VIN. ) Turn on the power supply and gradually increase the input voltage through the.9v to 0V range. ) Verify that VOUT is.v throughout the.9v to 0V input voltage range. Component Suppliers Detailed Description The MAX9 EV kit contains two step-down DC-DC converters. One of the circuits uses a MAX9, an - pin SO step-down controller. The other circuit uses a MAX9, a 0-pin µmax step-down controller. Both evaluation circuits are designed to achieve the lowest component cost. The MAX9 evaluation circuit has a V to.v input range. The output is configured for.v that can supply up to A. The MAX9 evaluation circuit has a higher input range of.9v to 0V. The output is configured for.v and can supply up to A. Both circuits have extra pads for additional input capacitors to reduce input ripple current. The switching frequencies for both the MAX9/ MAX9 are internally set at 00kHz. The circuits use a feedback voltage of 0.V and offer efficiencies up to 9%. Other Output Voltages The MAX9 EV kit comes preset to.v on VOUT, and.v on VOUT. To set other output voltages, refer to the MAX9/MAX9 data sheet for external component selection.
MAX9 Evaluation Kit C 00pF C 0.µF D R kω V IN COMP U MAX9 DH LX DL FB D R 0Ω C 0.µF R 0Ω R kω N-B N-A R.kΩ C µf L µh C 0µF V C 0µF C OPEN C 0µF VIN V.V VOUT.V AT A C.0µF Figure. MAX9 EV Kit Schematic (Evaluating MAX9)
MAX9 Evaluation Kit C 0.0µF C9 0.µF D R kω V IN COMP U MAX9 V L V CC DH LX DL FB 0 9 R SHORT (PC TRACE) R9 0Ω R SHORT (PC TRACE) R0 0Ω R kω C 0.µF C.µF D R.0kΩ N-B N-A C9 µf L µh C0 0µF V C 0µF C OPEN C 0µF VIN.9V TO 0V VOUT.V AT A C.0µF Figure. MAX9 EV Kit Schematic (Evaluating MAX9)
MAX9 Evaluation Kit Figure. MAX9 EV Kit Component Placement Guide Component Side Figure. MAX9 EV Kit PC Board Layout Component Side Figure. MAX9 EV Kit PC Board Layout Solder Side 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. Maxim Integrated Products, 0 San Gabriel Drive, Sunnyvale, CA 90 0--00 00 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.