MAX38904AEVK#TDFN Analog Devices

Click here for production status of specific part numbers. Evaluates: MAX38904A MAX38904A TDFN Evaluation Kit General Description Quick Start The MAX38904A TDFN evaluation kit (EV kit) evaluates Required Equipment the MAX38904A in a TDFN package. The MAX38904A is MAX38904A TDFN EV kit a low noise linear regulator. The EV Kit operates over an 5.5V, 5A DC power supply input range of 1.7V to 5.5V and provides a jumper select- able output voltage range from 1.2V to 5.0V. The EV Kit Electronic load capable of 2A can deliver up to 2A of current. Digital voltmeter (DVM) Features Procedure Evaluates the MAX38904A IC in a 14-pin The EV kit is fully assembled and tested. Follow the steps (3mm x 3mm) TDFN below to verify board operation. Caution: Do not turn 1.7V to 5.5V Input Range on power supply until all connections are completed. 1.2V to 5.0V Jumper Configurable Output Voltage 1) Verify that jumper JU101 is shunted on pins 1 and 2 (EV Kit enabled). Up to 2A Output Current 2) Verify that jumper SELA is shunted on pins 2 and 3, and Proven 2-Layer 1-oz Copper PCB Layout jumper SELB is shunted on only 1 pin (OUT = 3.3V). Demonstrates Compact Solution Size 3) Connect the 5.5V power supply between the IN and Fully Assembled and Tested nearest GND terminal posts. 4) Connect the 2A electronic load between the OUT and nearest GND terminal posts. MAX38904A TDFN EV Kit Files 5) Connect the DVM between the OUT and nearest FILE DECRIPTION GND terminal posts. EV Kit Bill of 6) Turn on the power supply. MAX38904A TDFN EV Kit BOM Material 7) Verify that the voltage at the OUT terminal post is MAX38904A TDFN EV Kit PCB Layout EV Kit Layout approximately 3.3V. MAX38904A TDFN EV Kit Schematic EV Kit Schematic 8) Decrease the power supply to 3.6V (To minimize power dissipation at full load). Ordering Information appears at end of data sheet. 9) Enable the electronic load. 10) Verify that the voltage at the OUT terminal post is 3.3V within the device accuracy specification. 319-100303 Rev 0 2/19Evaluates: MAX38904A MAX38904A TDFN Evaluation Kit EN (Enable) Detailed Description of Hardware The EV kit provides a jumper JU101 to enable or disable The MAX38904A TDFN EV kit evaluates the MAX38904A the MAX38904A. Refer to Table 1 for jumper setting of in a TDFN package. The MAX38904A is a low noise jumper JU101. linear regulator that delivers 2A of output current with only 5.1V of output noise from 10Hz to 100kHz. RMS Output Selection (SELA and SELB) This regulator requires only 100mV of input-to-output The EV kit provides a set of jumpers SELA and SELB to headroom at full load. configure the output voltage of the MAX38904A. Refer to The MAX38904A TDFN EV kit operates over an input Table 2 for jumper setting of jumpers SELA and SELB. range of 1.7V to 5.5V. The EV kit comes with the MAX38904AATD+ installed and the output voltage is jumper selectable between nine voltage levels: 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.1V, 3.3V, 4.0V, and 5.0V. Table 1. EN (JU101) SHUNT POSITION DESCRIPTION 1-2* Enabled. EN = IN* 2-3 Disabled. EN = GND *Default position. Table 2. Output Selection (SELA and SELB) SELA SELB OUTPUT VOLTAGE SHUNT POSITION SELA CONNECTION SHUNT POSITION SELB CONNECTION Not Installed Hi-Z 1-2 IN 1.2V 1-2 IN Not Installed Hi-Z 1.5V Not Installed Hi-Z 2-3 GND 1.8V Not Installed Hi-Z Not Installed Hi-Z 2.5V 2-3 GND 2-3 GND 3.0V 2-3 GND 1-2 IN 3.1V 2-3* GND* Not Installed* Hi-Z* 3.3V* 1-2 IN 2-3 GND 4.0V 1-2 IN 1-2 IN 5.0V *Default position. Maxim Integrated 2 www.maximintegrated.com