MAX845EVKIT-MM Analog Devices

Evaluates: MAX845 19-0372 Rev 4 10/97 MAX845 Evaluation Kit General Description Features The MAX845 evaluation kit (EV kit) is an assembled and Isolated Power Supply tested isolated 5V power supply that meets PCMCIA Low Profile (for PCMCIA cards) height requirements. Two demonstration circuits are provided: a 100mA circuit that uses an industry-stan- dard 78L05 regulator, and a 40mA circuit that uses a low-cost zener shunt regulator. Both circuits consist of a MAX845 IC (in the MAX package), a low-profile transformer, a half-wave rectified voltage doubler, and Ordering Information a regulator. PART TEMP. RANGE BOARD TYPE MAX845EVKIT-MM 0C to +70C Surface Mount Component List DESIGNATION QTY DESCRIPTION C11-C14, Quick Start 8 0.1F ceramic 1206 capacitors C21-C24 The MAX845 EV kit is fully assembled and tested. D11, D12 2 Motorola MBR0520L Schottky diodes Follow the steps below to verify board operation. Do not turn on the power supply until all connections Series-connected dual Schottky diodes D21 1 are completed. The circuit on the top half of the board Central Semiconductor CMPSH-3S can provide up to 100mA. The circuit on the lower half R22 1 51 1206 resistor of the board can provide up to 40mA. U11, U21 2 Maxim MAX845EUA 1) Connect a 4.5V to 5.5V supply to the pad marked U12 1 78L05 in surface-mount 8-pin SOIC +5V IN. The power-supply ground return connects 1:1:1 low-profile transformer to the GND pad. T11, T21 2 Halo TGM-010P3 2) Connect a voltmeter and load (if any) to the +5OUT 5.1V, 5% zener in SOT-23 pad. The load ground return connects to the ISO Z21 1 Central Semiconductor CMPZ5231B GND pad. 3) Turn on the power and verify that the output is 5V 5%. 4) To evaluate shutdown, cut the trace connecting SD to GND and connect SD to V . CC Component Suppliers SUPPLIER PHONE FAX Central (516) 435-1110 (516) 435-1824 Semiconductor 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: MAX845 Evaluation Kit ISOLATED 5V 100mA: D11 T11 MBR0520L OFF HALO TGM-010P3 +5V ISO 8 1 IN OUT +5V IN U11 U12 1 4 SD D1 MAX845 78L05 C12 3 C11 0.1F FS 0.1F 6 5 ON N.C. V CC ISO GND 2 GND 2 3 6 7 G1 7 8 G2 D2 C13 C14 0.1F 0.1F D12 MBR0520L LOW PROFILE, ISOLATED 5V 40mA: R22 ISO +5V T21 51 HALO TGM-010P3 OFF +5V D21A IN U21 4 1 C22 SD D1 MAX845 ISO 0.1F 3 Z21 C21 CMPSH-3S GND FS 5.1V 0.1F SOT-23 6 D21B ON 5 N.C. V CC C24 GND 2 0.1F G1 8 7 G2 D2 C23 0.1F NOTE: THE TWO CIRCUITS DO NOT SHARE THE SAME GROUNDS. Figure 1. MAX845 EV Kit Schematic 2 Evaluates: MAX845