Evaluates: MAX20710 MAX20710 Evaluation Kit General Description Quick Start The MAX20710 Evaluation Kit (EV kit) serves as a Required Equipment reference platform for evaluating the MAX20710 MAX20710EVKIT EV kit voltage-regulator IC. This single-chip, integrated switching 4.5V to 16V power supply regulator provides an extremely compact, low-cost, highly efficient, fast, accurate, and reliable power-delivery 0A to 10A load solution for emerging low-output voltage applications up Oscilloscope, probes, and voltmeter to 10A. Refer to the MAX20710 IC data sheet for more information. Optional Equipment MAXPOWERTOOL002 USB-to-PMBus interface The EV kit comprises a fully-assembled and tested PCB dongle implementation of the MAX20710. Jumper pins, test points, and input/output connectors are included for flex - Maxim PowerTool software ibility and ease-of-use in a wide range of applications. Procedure The evaluation board is configured with an edge The EV kit is fully assembled and tested. Verfiy board strip to allow high di/dt loading when evaluating the operation using these steps: system. The +VOUT connection is on the top side, while the return (or -VOUT) is on the bottom side, 1) Connect a powered-off 4.5V to 16V input supply directly mirroring the top-side strip. Either solder the to J1. load devices directly to the output strip or use the J8 Optionally, connect supply sense leads to VDD1 terminal block to interface to a load. and GND1 for best accuracy. 2) Connect the load to J3 or J8. Features 3) If Maxim PowerTool software is used, connect the MAXPOWERTOOL002 USB-to-PMBus interface High Efficiency and Power Density dongle to J704 and to the USB port on the PC. Low Component Count 4) Connect the VOUT scope probe/voltmeter to J4 or Small Solution Size J11, as desired. 2 509mm Including Inductor and Output Capacitors 5) J4 and J11 are connected to the sense point for best accuracy. Optimized Performance Position the SW1 toggle switch, pointing away from Reduced Design-In Time J1 to enable the IC (if desired). Interfaces to Maxim PMBus Dongle and 6) Turn on the input supply and observe that PowerTool GUI VOUT = 1V. 7) For efficiency measurements, J6 has the appropriate Proven PCB Layout Kelvin sense points. Fully Assembled and Tested Ordering Information appears at end of data sheet. PMBus is a trademark of SMIF, Inc. PowerTool is a trademark of Maxim Integrated Products, Inc. 319-100146 Rev 0 2/18Evaluates: MAX20710 MAX20710 Evaluation Kit Monitoring Operation Status Monitoring: Whenever the part is actively Output Enable (OE) regulating, and the output volt age is within the OE is used to enable/disable the output voltage. The power-good window, the STAT pin is high. In all other output voltage is enabled/disabled by SW1. Pointing SW1 conditions, including enabled but in a fault state, the in the direction of the silkscreened arrow enables the STAT pin is pulled low. Refer to the MAX20710 IC regulator. data sheet for more details. Output-Voltage Selection Input-Voltage Monitoring: The VDD1 and GND1 sense points monitor the input supply. The MAX20710 EV kit is set up to initially boot up to an output voltage of 1V. This has been accomplished by Switching-Voltage Monitoring: The switching wave- setting the reference to come up to a V of 0.65V form can be monitored on VX1. BOOT and placing a voltage-divider in the feedback path with a Output-Voltage Monitoring: J4-1 and J4-2 monitor divide ratio of 0.65. The reference voltage can be changed the output voltage of VOUT and GND, respectively. through PMBus, in which case the output voltage follows These test points should not be used for loading. the reference voltage divided by the 0.65 divide ratio. To Alternatively, scope jack J11 can be used to monitor achieve higher output voltages, a higher divide ratio can the output voltage. be used. Note that the PMBus can command and report (write/read) VOUT as the voltage at the sense pins, so Efficiency Testing with the feedback-divider in place, the divide ratio must J6 provides convenient access to the appropriate VIN and be taken into account. VOUT sense points. R of the IC and output capacitance of the EV kit GAIN VIN EFF are on J6 pins 1-2. can also be changed to affect per formance. Refer to the VOUT EFF are on J6 pins 3-4. MAX20710 IC data sheet for more details. Input and output currents should be measured with Soft-Start and Switching Frequency 0.1% lab shunts. These are programmable parameters. For the EV kit, For increased accuracy, shunt mismatch can be soft-start is set to 3ms and switching frequency is set to measured and calibrated out by doing a test running 400kHz. the same current through both shunts. Ordering Information PART TYPE MAX20710EVKIT EV Kit Denotes RoHS compliant. Maxim Integrated 2 www.maximintegrated.com