Evaluates: MAX20012B MAX20012 Evaluation Kit Procedure General Description The EV kit is fully assembled and tested. Follow the steps The MAX20012 evaluation kit (EV kit) demonstrates the below to verify board operation. Caution: Do not turn on MAX20012B automotive 2-channel step-down convert- supplies until all connections are completed. ers. The EV kit operates over a 3V to 5.5V input range. Output 1 is set for 0.98V and up to 24A load and output 1) Verify that jumpers J4 and J5 have shunts placed 2 is set for 0.95V and up to 12A load. across pins 1-2. 2) Connect the power supply between the PVDD and Benefits and Features the PGND4 test points. Differential Remote Voltage Sensing 3) Preset the electronic load to 12A. Make sure the load 3V to 5.5V Input Supply Range is disabled. 2 I C-Controlled 0.5V to 1.5875V Output Voltage 4) Connect the electronic load between the OUT2 and Range the PGND2 test points. Use short high-gauge wires to ensure low voltage drop on the wires to help main- 2.2MHz Operation tain voltage headroom on the load. 2% Output-Voltage Accuracy 5) Connect the DVM between the OUT2 and PGND2 Power-Good Output test points. Current-Mode, Forced-PWM, and Skip Operation 6) Turn on the power supply. Proven PCB Layout 7) Enable the electronic load. Fully Assembled and Tested 8) Verify that the voltage at the OUT2 test point is approximately 0.95V. EV Kit Contents 9) Disable the electronic load. MAX20012 EV Kit Board 10) Turn off the power supply. Quick Start 11) Disconnect the electronic load from the OUT2 and the PGND2 test points. Recommended Equipment 12) Disconnect the DVM from the OUT2 and the PGND2 MAX20012 EV kit test points. 5V, 7A DC power supply 13) Preset the electronic load up to 24A. Make sure the Electronic load capable of 24A load is disabled. Digital voltmeter (DVM) 14) Connect the electronic load between the OUT1 and the PGND1 test points. Use short high-gauge wires to ensure low voltage drop on the wires to help main- tain voltage headroom on the load. 15) Connect the DVM between the OUT1 and the PGND1 Ordering Information appears at end of data sheet. test points. 16) Turn on the power supply. 17) Enable the electronic load. 18) Verify that the voltage at the OUT1 test point is approximately 0.98V. 19-7573 Rev 3 3/19Evaluates: MAX20012B MAX20012 Evaluation Kit Output Voltage Detailed Description of Hardware Output voltage is selectable using the VID registers (refer EN1, EN2 Enable (J4, J5) to Table 9 and Table 10 in the MAX20012B IC data sheet). Place a shunt across pins 1-2 on jumper J4 for normal Be aware of the VIDMAX registers (Table 4 in the IC data operation of output 1. Place a shunt across pins 1-2 on sheet), as this might limit the maximum output voltage. jumper J5 for normal operation of output 2. To disable either output, place the shunt across pins 2-3. When J4 OUT1 Single-Phase Operation and J5 are both shunted to GND, the IC is in shutdown OUT1 can be configured for single-phase operation. mode and input current is reduced to 5A (typ). See Remove inductor L3. Move the 0 resistor from R33 Table 1. to R34. Synchronization Input/Output (SYNC) Table 1. EN1, EN2 Configuration (J4, J5) The EV kit features a SYNC connection that allows for SHUNT POSITION DESCRIPTION synchronization input or output. The function is set by the Connects the EN pin to the voltage SO 1:0 bits, as defined in the MAX20012B IC data sheet. Pins 1-2 at PVDD for normal operation See Table 2. Connects the EN pin to ground to 2 Pins 2-3 I C Slave Address (ADDR) enter shutdown mode The EV kit provides jumper J6 to set the ADDR register. *Default position. Pulldown resistor R19 is used to set ADDR = 0. If ADDR = 1 is desired, place a shunt across pins 1-2 on jumper J6. Refer to Table 1 in the MAX20012B IC data sheet for Table 2. SYNC Settings 2 more details on the I C slave address. BIT BIT DESCRIPTION Power-Good Output (PGOOD) SYNC I/O Select The EV kit features an open-drain PG output that 00 Master: Input, rising edge starts cycle asserts when the output voltage is between the PG UV SO 1:0 01 Master: Input, falling edge starts cycle and PG OV thresholds. PG is asserted after the power- 10 Master: Output, falling edge starts cycle good active timeout period. An additional 220s (typ) PG 11 Unused delay exists following soft-start or DVS slewing. PG is deasserted after a UV/OV propagation delay if the output voltage is outside the PG UV/OV thresholds. PG is con- Ordering Information nected to a 1k pullup resistor. PART TYPE MAX20012EVKIT EV Kit Denotes RoHS compliant. Maxim Integrated 2 www.maximintegrated.com