Evaluates: MAX20796 and MAX20766 MAX20796 Discrete Inductor Evaluation Kit General Description Quick Start The MAX20796 Discrete Inductor evaluation kit (EV kit) Required Equipment provides a proven design to evaluate the MAX20796 fully- MAX20796 EV kit assembly integrated, two-phase switching regulator. The MAX20766 One 12V DC power supply (PS1) capable of can be installed on the EV kit for a three-phase switching delivering 20A current regulator operation. The EV kit operates from a 4.5V to 16V input voltage range and supports an output voltage range Voltmeters of 1.8V to 5V. The board uses the MAX20796 on a proven Procedure eight-layer PCB design. The EV kit is fully assembled and tested. Follow the steps Features below to verify board operation. 4.5V to 16V Input Voltage Range Caution: Do not turn on the power supply until all connections are completed. 1.8V to 5V Output Voltage Range 1) Verify that a shunt is installed across jumpers JP1 and J13. Banana Jacks for Input and Output Voltage 2) Make sure switches S1 and S2 are in the off position. SMB Coaxial Cable Jacks for Output Voltage Measurement and SYNC Clock Input and Output 3) Turn on power-supply PS1 and set the supply to 12V, then disable the power supply. Configurable Output Voltage and Compensation Parameters 4) Connect the positive terminal of power-supply PS1 to the J5 banana jack on the EV kit. Connect the Adjustable Current Limit negative terminal of the power supply to the J8 PMBus Header for Connection to the banana jack. MAXPOWERTOOL002 Dongle 5) Enable the power supply. FAULT and PG Outputs 6) Toggle the S1 switch in the On position. The switch Enable Input and Enable Debounce Circuit should turn GREEN. Fully Assembled and Tested 7) Toggle the S2 switch in the On position. The switch should turn GREEN. 8) Verify that the voltage between the V and GND OUT Ordering Information appears at end of data sheet. pins at jumper JP2 is 3.3V. 9) The EV kit is now ready for additional evaluation. 319-100392 Rev 1 4/20Evaluates: MAX20796 and MAX20766 MAX20796 Discrete Inductor Evaluation Kit to V and the device regulation is enabled. A JP1 jumper IN Detailed Description of Hardware is also provided on board to connect or disconnect this The MAX20796 Discrete Inductor EV kit provides a proven power supply from the rest of the board. See Table 1 for design to evaluate the MAX20796, fully integrated, highly JP1 settings. efficient, two-phase switching regulator. MAX20766 can be installed on the EV kit for a three-phase switching EN Input for the MAX20796 regulator operation. The power input and load can be easily The devices enable input is controlled by switch S2. If connected using the banana jacks and connectors provided S2 is in the off position, the EN pin is forced to GND and for the input and output. Test points and connectors are device regulation is disabled. If S2 is in the On position, provided to monitor and control the device signals. The the EN pin is pulled up to 3.3V and device regulation is EV kit operates between input voltage of 4.5V to 16V. enabled. Additionally, a test point (EN) is also provided to The EV kit regulates the output voltage between 1.8V to drive the EN pin. 5V. The EV kit must always be operated within SOA limit defined in MAX20796 data sheet. LDO Input voltage selection (VLDOIN) The LDO input range for this device is 2.97V to 16V. This Two and Three-Phase Operation board offers options to choose the LDO input from 3.3V The schematic is drawn for 3-phase (3PH) operation (AUX3P3 supply), V , and 3.0V regulated by the EB pin IN by default. For 2-phase (2PH) operation, the schematic and external NFET. Jumpers J1 and J2 are used for this annotates the changes in the components values. For selection. See Table 2 for J1 and J2 settings. 2PH operation, MAX20766 is DNI and two discrete inductors are used. 3.3V Pullup for SCL, SDA and ALERT Jumper J13 is used to pull up the SCL, SDA, and ALERT AUX3P3 Power Supply for the EV Kit pins to 3.3V. See Table 3 for J13 settings. The EV kit AUX3P3 power supply enable input is controlled by switch S1. If S1 is in the off position, the EN pin is forced to GND and the device regulation is disabled. If S1 is in the on position, the EN pin is pulled up Table 1. JP1 Jumper Selection SHUNT POSITION AUX3P3 POWER SUPPLY TO THE BOARD Installed* Connected Not installed Not connected *Default position. Table 2. J1 and J2 Jumper Selection JUMPER CONNECTIONS VLDOIN VOLTAGE J1 not installed and J2 not installed* 3.0V regulated by the EB pin and external NFET J1 installed and J2 not installed V IN J1 not installed and J2 installed 3.3V powered by the AUX3P3 supply on board *Default position. Table 3. J13 Jumper Selection: Pullup for SCL, SDA and ALERT pins SHUNT POSITION PULLUP TO 3.3V Installed* Enabled Not installed Disabled *Default position. Maxim Integrated 2 www.maximintegrated.com