MAX38903EVKIT#TDFN Analog Devices

Click here for production status of specific part numbers. Evaluates: MAX38903A/MAX38903B MAX38903 TDFN Evaluation Kit General Description Quick Start The MAX38903 TDFN evaluation kit (EV kit) evaluates Required Equipment the MAX38903A/MAX38903B IC family of low noise linear MAX38903 TDFN EV kit regulators. The EV kit operates over an input range of 5.5V, 1A DC power supply 1.7V to 5.5V and provides any output voltage range from 0.6V to 5.3V, and delivers up to 1A of current. The EV kit Electronic load capable of 1A comes with the MAX38903BATB+ installed. Digital voltmeter (DVM) Features Procedure Evaluates the MAX38903A/MAX38903B IC in a The EV kit is fully assembled and tested. Follow the steps 10-pin (3mm x 3mm) TDFN below to verify board operation. 1.7V to 5.5V Input Range Caution: Do not turn on power supply until all connections are completed. 0.6V to 5.3V Resistor Configurable Output Voltage (MAX38903B, On Board with Output Set to 3.3V) 1) Verify that jumpers JU101, SELA and SELB are in their default positions, as shown in Tables 1, 2, and 3. 1.2V to 5.0V Jumper Configurable Output Voltage 2) Connect the 5.5V power supply between the IN and (MAX38903A, with IC Replacement) nearest GND terminal posts. Up to 1A Output Current 3) Connect the 1A electronic load between the OUT Proven 2-Layer 1 oz Copper PCB Layout and nearest GND terminal posts. 4) Connect the DVM between the OUT and nearest Demonstrates Compact Solution Size GND terminal posts. Fully Assembled 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 3.3V. MAX38903 TDFN EV Kit Files FILE DECRIPTION MAX38903 TDFN EV Kit BOM EV Kit Bill of Material MAX38903 TDFN EV Kit PCB Layout EV Kit Layout MAX38903 TDFN EV Kit Schematic EV Kit Schematic 319-100262 Rev 0 10/18Evaluates: MAX38903A/MAX38903B MAX38903 TDFN Evaluation Kit Table 1. EN on MAX38903A/B (JU101) Detailed Description of Hardware The MAX38903 TDFN EV kit evaluates the MAX38903A/ JU101 DESCRIPTION MAX38903B IC family. The MAX38903A/MAX38903B SHUNT POSITION are low noise linear regulators that deliver 1A of output 1-2* Enabled. EN = IN current with only 12uV of output noise from 10Hz to RMS 2-3 Disabled. EN = GND 100kHz. These regulators require only 100mV of input-to- output headroom at full load. *Default position. The MAX38903 TDFN EV kit operates over an input range of 1.7V to 5.5V. The EV Kit comes with the MAX38903BATB Table 2. GS on MAX38903B (SELA) + installed and the output voltage is resistor configured to 3.3V and can deliver 1A of current. The output voltage on SELA DESCRIPTION the MAX38903B can be reconfigured to other voltages SHUNT POSITION from 0.6V to 5.3V by replacing feedback resistors R101 Not allowed (for MAX38903A output 1-2 and R102. Refer to the MAX38903 IC data sheet for feed- selection) back resistor calculation. 2-3* GS = GND EN for the MAX38903A/B *Default position. The EV kit provides a jumper JU101 to enable or disable the MAX38903B (or the MAX38903A after IC replace- Table 3. POK on MAX38903B (SELB) ment). Refer to Table 1 for jumper setting of jumper JU101. SELA GS for the MAX38903B DESCRIPTION SHUNT POSITION When evaluating the MAX38903B, the Ground Sense (GS) Not allowed (for MAX38903A output pin must be connected to ground to stabilize the output 1-2 selection) with load. The EV kit provides a jumper SELA to con- Not allowed (for MAX38903A output nect the MAX38903B GS pin to ground. Refer to Table 2 2-3 selection) for jumper setting of jumper SELA. Not Installed* Access signal at the POK test point POK for the MAX38903B *Default position. The EV kit provides a test point to access the POK output signal from the MAX38903B. Remove shunt from jumper SELB to access the MAX38903B POK test point. Refer to Table 3 for jumper setting of jumper SELB. Maxim Integrated 2 www.maximintegrated.com