MAX38642AEVK#WLP Analog Devices

Click here for production status of specific part numbers. Evaluates: MAX38640/1/2/3 A/B in DFN MAX38640 DFN Evaluation Kit General Description Quick Start The MAX38640 evaluation kit (EV kit) evaluates the Required Equipment MAX38640/1/2/3 A/B IC family of ultra-low quiescent MAX38640 DFN EV kit current step-down DC-DC converters in the DFN 5.5V, 3A DC power supply package. The EV kit operates over an input range of 1.8V to 5.5V, and provides resistor-configurable Electronic load capable of 250mA output voltages from 0.7V to 3.3V. The EV kit delivers Digital voltmeter (DVM) up to 175mA/350mA/700mA of current depending on the input voltage to the output voltage ratio. Procedure The EV kit is fully assembled and tested. Follow the steps The EV kit comes with the MAX38640AELT+ installed. below to verify board operation. Features Caution: Do not turn on power supply until all con- Evaluates the MAX38640/1/2/3 A/B IC Family in a nections are completed. 6-pin DFN 1) Verify that jumpers JU1 and JU2 are in their default 1.8V to 5.5V Input Range positions, as shown in Table 1 and Table 2. 2) Connect the 5.5V power supply between the IN and 0.7V to 3.3V Configurable Output Voltage nearest GND terminal posts. Up to 175mA/350mA/700mA Output Current 3) Connect the 250mA electronic load between the Proven 2-Layer 1oz Copper PCB Layout OUT and nearest GND terminal posts. 4) Connect the DVM between the OUT and nearest Demonstrates Compact Solution Size GND terminal posts. Fully Assemble and Tested 5) Turn on the power supply. 6) Enable the electronic load. 7) Verify that the voltage at the OUT terminal post is Ordering Information appears at end of data sheet. approximately 1.8V. MAX38640 EV Kit Files FILE DECRIPTION MAX38640 DFN EV BOM EV Kit Bill of Material MAX38640 DFN EV PCB Layout EV Kit Layout MAX38640 DFN EV Schematic EV Kit Schematic MAX38640 DFN EV Minimal Component Schematic Minimal Component Circuit 319-100268; Rev 0; 10/18Evaluates: MAX38640/1/2/3 A/B in DFN MAX38640 DFN Evaluation Kit RSEL Detailed Description of Hardware The MAX38640 DFN EV kit provides a jumper JU2 The MAX38640 EV kit evaluates the MAX38640/1/2/3 A/B to configure the RSEL pin of the MAX38640. Refer to IC family of ultra-low quiescent current step-down DC-DC Table 2 for jumper JU2 settings. converters in the DFN package. The EV kit operates over an input range of 1.8V to 5.5V, and provides resistor- Spare Inductors configurable output voltages from 0.7V to 3.3V. The EV kit The MAX38640 DFN EV kit provides spare inductors on delivers up to 175mA/350mA/700mA of current depending the PCBs bottom side. The spare inductors can be used on the input voltage to the output voltage ratio. to reconfigure the EV kit output current ratings. The EV kit comes with the MAX38640AELT+ installed. Evaluating the other MAX38640/1/2/3 A/B EN The MAX38640 DFN EV kit can be modified to evaluate The MAX38640 DFN EV kit provides a jumper JU1 to the other DFN ICs in the MAX38640/1/2/3 A/B family. enable or disable the MAX38640. Refer to Table 1 for To evaluate the other DFN ICs in the MAX3864x A/B jumper JU1 settings. family, replace U1 with the desired IC and refer to the MAX38640/1/2/3 A/B IC data sheet for additional detail. Table 1. EN (JU1) Table 2. RSEL (JU2) SHUNT POSITION DESCRIPTION SHUNT POSITION DESCRIPTION 1-2* EV Kit Enabled 1-2 OUT = 0.7V 1-3 OUT = 1.0V EV Kit Controlled by External (TTL) 1-3 Source Connected to EXT_EN 1-4* OUT = 1.8V 1-4 EV Kit Disabled 1-5 OUT = 3.3V *Default position. *Default position. Component Suppliers SUPPLIER WEBSITE Cal Chip Electronics www.calchipelectronics.com/ Samsung Electronics www.samsung.com Wurth Electronics www.we-online.com Note: Indicate that you are using the MAX38640/1/2/3 A/B when contacting these component suppliers. Ordering Information PART TYPE MAX38640EVKIT#DFN EV Kit #Denotes RoHS Maxim Integrated 2 www.maximintegrated.com