MAX77324EVKIT# Analog Devices

Click here for production status of specific part numbers. Evaluates: MAX77324 MAX77324 Evaluation Kit General Description Benefits and Features The MAX77324 evaluation kit (EV kit) provides a proven Proven PCB Reference Design and Layout design to evaluate a high-efficiency synchronous step - Fully Assembled and Tested down DC-DC converter with integrated MOSFETs that Sense Points for High-Accuracy Measurements operate over a 2.5V to 4.8V input voltage range, 0.6V to 2V output voltage range, and supports up to 1.5A of load Test Point and Jumper for Enable current. The device automatically transitions between PWM and SKIP modes of operation when the load condi- Ordering Information appears at end of data sheet. tion changes. Figure 1. MAX77324 EV Kit Photo 319-100200 Rev 0 5/18Evaluates: MAX77324 MAX77324 Evaluation Kit Quick Start Detailed Description Required Equipment Enabling and Disabling the Regulator MAX77324 EV kit Turn on the device by installing a jumper between posi- tions 1-2 on J1. The jumper connects the EN pin to V , IN Power supply with 6V and 1A capability enabling the regulator with soft-start. Remove jumper Two digital voltmeter (DVM) J1 to disable the regulator. EN has an internal pulldown Ammeter resistor to ground. Procedure Table 1. Default Shunt Positions and The EV kit is fully assembled and tested. Follow these Jumper Descriptions steps to verify board operation: 1) Install J1 as recommended in Table 1. REFERENCE DEFAULT FUNCTION 2) Connect a disabled 3.8V bench power supply through DESIGNATOR POSITION an ammeter to the V and PGND inputs. Set the in- IN 1-2: Connects EN to V to IN put current limit of the bench power supply to 100mA. enable the regulator. Set the ammeter range to its 10mA setting. Do not Open: Disconnect EN from J1 1-2 enable the output of the bench supply until prompted. V to disable the regulator. IN 3) Connect a voltmeter to the VINS and GNDS terminals EN has an internal to measure input voltage. pulldown resistor to ground. 4) Connect a voltmeter to the VOUTS and GNDS termi- nals to measure output voltage. 5) Enable the output of the bench power supply. Table 2. Setting the Output Voltage 6) At this point, your setup is complete and the device V (V) R (k R (k) C (pF) OUT TOP ) BOT TOP under test (DUT) is Enabled. Confirm that your input 0.6 Short Open Open current ammeter has ~45A. 0.85 12.4 30.1 220 7) If the input current in the above step is correct, in- crease the input current limit of the bench supply to 0.9 15 30.1 220 1A. Also, increase the input ammeter range to 3A. 0.95 17.8 30.1 220 8) Observe the output voltage on the voltmeter between 1.0 20 30.1 220 VOUTS and GNDS. Confirm that the output voltage 1.1 24.8 30.1 220 matches the expected output voltage (refer to the Set- ting the Output Voltage section of the data sheet). 1.2 30.1 30.1 220 At higher load/input currents, the input current 1.35 37.4 30.1 220 ammeter must either be set to a higher range 1.5 45.3 30.1 220 or bypassed, so as not to drop the input voltage 1.8 60.4 30.1 220 (measured at VINS) below operating voltages. 2.0 69.8 30.1 220 Maxim Integrated 2 www.maximintegrated.com