MAX845EVKIT-MM

19-0372; Rev 4; 10/97 MAX845 Evaluation Kit ____________________________Features ♦ Isolated Power Supply ♦ Low Profile (for PCMCIA cards) ______________Ordering Information PART MAX845EVKIT-MM TEMP. RANGE 0°C to +70°C BOARD TYPE Surface Mount ____________________Component List DESIGNATION QTY DESCRIPTION C11-C14, C21-C24 8 0.1µF ceramic 1206 capacitors D11, D12 2 Motorola MBR0520L Schottky diodes D21 1 Series-connected dual Schottky diodes Central Semiconductor CMPSH-3S R22 1 51Ω 1206 resistor U11, U21 2 Maxim MAX845EUA U12 1 78L05 in surface-mount 8-pin SOIC T11, T21 2 1:1:1 low-profile transformer Halo TGM-010P3 Z21 1 5.1V, 5% zener in SOT-23 Central Semiconductor CMPZ5231B _________________________Quick Start The MAX845 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. The circuit on the top half of the board can provide up to 100mA. The circuit on the lower half of the board can provide up to 40mA. 1) Connect a 4.5V to 5.5V supply to the pad marked +5V IN. The power-supply ground return connects to the GND pad. 2) Connect a voltmeter and load (if any) to the +5OUT pad. The load ground return connects to the ISO GND pad. 3) Turn on the power and verify that the output is 5V ±5%. ______________Component Suppliers SUPPLIER PHONE 4) To evaluate shutdown, cut the trace connecting SD to GND and connect SD to VCC. FAX Central Semiconductor (516) 435-1110 (516) 435-1824 Halo Electronics (415) 969-7313 (415) 367-7158 Motorola (602) 244-5303 (602) 244-4015 ________________________________________________________________ Maxim Integrated Products 1 For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 408-737-7600 ext. 3468. Evaluates: MAX845 _______________General Description The MAX845 evaluation kit (EV kit) is an assembled and tested isolated 5V power supply that meets PCMCIA height requirements. Two demonstration circuits are provided: a 100mA circuit that uses an industry-standard 78L05 regulator, and a 40mA circuit that uses a low-cost zener shunt regulator. Both circuits consist of a MAX845 IC (in the µMAX package), a low-profile transformer, a half-wave rectified voltage doubler, and a regulator. Evaluates: MAX845 MAX845 Evaluation Kit ISOLATED 5V @ 100mA: T11 HALO TGM-010P3 OFF +5V IN D11 MBR0520L 8 U11 IN GND ON ISO +5V 1 U12 1 SD MAX845 D1 3 FS 6 5 N.C. VCC 2 G1 8 7 D2 G2 4 C11 0.1µF OUT 78L05 C12 0.1µF ISO GND 2 3 6 7 C13 0.1µF C14 0.1µF D12 MBR0520L LOW PROFILE, ISOLATED 5V @ 40mA: R22 T21 HALO TGM-010P3 OFF +5V IN 51Ω D21A U21 1 SD MAX845 D1 3 FS 6 5 N.C. VCC 2 G1 8 7 D2 G2 4 C21 0.1µF GND ON ISO +5V CMPSH-3S SOT-23 C22 0.1µF D21B C24 0.1µF C23 0.1µF NOTE: THE TWO CIRCUITS DO NOT SHARE THE SAME GROUNDS. Figure 1. MAX845 EV Kit Schematic 2 ISO GND Z21 5.1V _______________________________________________________________________________________ MAX845 Evaluation Kit Evaluates: MAX845 Figure 2. MAX845 EV Kit Component Placement Guide— Component Side Figure 3. MAX845 EV Kit PC Board Layout—Component Side Figure 4. MAX845 EV Kit PC Board Layout—Solder Side _______________________________________________________________________________________ 3 Evaluates: MAX845 MAX845 Evaluation Kit NOTES 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 © 1997 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.