Evaluates: MAX77816 MAX77816 Evaluation Kit General Description Benefits and Features The MAX77816 evaluation kit (EV kit) is a fully assembled Buck and Boost Operation Including Seamless and tested printed circuit board (PCB) for evaluating the Transition between Buck and Boost Modes IC. The IC is a high-current, high-efficiency buck-boost 2.3V to 5.5V V Range IN regulator targeting single-cell Li-ion battery-powered 2.60V to 5.14V V with 20mV Step OUT applications. It supports a wide output voltage range 3A Minimum Continuous Output Current (V 3.0V, V = 3.3V) from 2.60V to 5.14V. The IC allows 5A (typ) maximum INBB OUTBB switch current. In buck mode, the output current can go Burst Current: 3.6A Minimum Output Current for 800s (V 3.0V, V = 3.3V) as high as 4A, and in boost mode, the maximum output INBB OUTBB current can be 3A. A unique control algorithm allows high- 2 I C Serial Interface Allows Dynamic V OUT efficiency, outstanding line/load transient response, and Adjustment and Provides Design Flexibility seamless transition between buck and boost modes. 97.5% Peak Efficiency 2 2 The IC features I C-compatible serial interface. The I C 40A Quiescent Current interface allows the output voltage to be dynamically Safety Features Enhance Device and System adjusted thus enabling finer control of system power con - 2 Reliability sumption. The I C interface also provides features such Soft-Start as enable control and device status monitoring. True Shutdown The multifunction GPIO pin is register settable to five Thermal Shutdown and Short-Circuit Protection different options such as FPWM mode enable and induc - Multifunction GPIO Pin tor peak current-limit selection. These options provide MAX77816A: FPWM Mode Enable design flexibility that allows the IC to cover a wide range MAX77816B: Inductor Peak Current-Limit Selection of applications and use cases. MAX77816C: Output Voltage Selection The Maxim Command Module (MINIQUSB) can be MAX77816D: Power-OK Indicator 2 used to enable USB-to-I C communication between a MAX77816E: Interrupt Indicator Windows -compatible PC and the EV kit. The EV kit soft- Small Size: 1.827mm x 2.127mm, 20-Bump WLP, ware provides a Windows-based graphical user interface 0.4mm Pitch (GUI) to exercise the various features of the IC. Ordering Information appears at end of data sheet. Windows is a registered trademark and registered service mark of Microsoft Corporation. True Shutdown is a trademark of Maxim Integrated Products, Inc. Figure 1. MAX77816 EV Kit Photo 319-100041 Rev 1 3/19Evaluates: MAX77816 MAX77816 Evaluation Kit ammeters to operate in their auto-range mode. If Quick Start current readings are not required, short across the Required Equipment ammeters. MAX77816 EV kit 4) Turn on the power supply. 5) Switch JU2 to OUT1(1-2) to enable the IC. Verify MAX77816 EV kit software (GUI) that the voltage at OUTBBS is 3.4V (default output Maxims MINIQUSB (optional, USB cable included) voltage setting). Adjustable DC power supply capable of supplying 6) Enable the electronic load and apply load current as 6V 9A required. 7) The EV kit software can be downloaded from www. Digital multimeters 2 maximintegrated.com/evalkitsoftware. If I C Electronic load capable of sinking 4A control is required, install the EV kit software on Oscilloscope (optional) to your computer by running the installation file (MAX77816GUISetup1.70605.0A.EXE). The pro- Note: In the following sections, software-related items gram files are copied and a shortcut icon is created are identified by bolding. Text in bold only refers to items in Windows Start Programs. directly from the EV kit software. Text in bold and under- 8) Connect the MINIQUSB to J1. Connect a USB cable lined refers to items from the Windows OS. from the PC to the MINIQUSB. Procedure 9) Start the EV kit software by opening its icon in the The EV kit is fully assembled and tested. Follow the steps Start Programs. The EV kit software main window below to verify board operation. Use twisted wires of appears. Click on Device then Connect. If connec- appropriate gauge (20AWG) that are as short as possible tion is successful, a window displaying the message to connect the load and power sources. Currently connected to CMOD MINIQUSB and device MAX77816 appears as shown in Figure 3. 1) Confirm all jumpers are in their default positions as Click Read and Close. indicated in Table 1. 10) The EV kit and GUI are now ready for use. 2) Preset the DC power supply to 3.8V. Do not turn on the power supply until all connections are completed. 3) Set up the test circuit as shown in Figure 2. Ad- just the ammeters to their largest current range to minimize their series impedance. Do not allow the USB CABLE PC MINIQUSB J1 + - OUTBB A OUTBBS + - + A VIN MAX77816 + VINS ELECTRONIC EVALUATION + V + LOAD KIT POWER - V - SUPPLY PGNDS - - PGND1 PGND1S PGND Figure 2. Quick Start Connection Diagram Maxim Integrated 2 www.maximintegrated.com