MIC7401 Evaluation Board Configurable PMIC, Five-Channel Buck Regulator plus One-Boost with 2 HyperLight Load , I C Control and Enable General Description Requirements The MIC7401 is a powerful, highly-integrated, The MIC7401 evaluation board requires only a single configurable, power-management IC (PMIC) featuring five power supply with 5A (minimum) current capability. The synchronous buck regulators, one boost regulator, and output load can either be an active (electronic) or passive 2 high-speed I C interface with an internal EEPROM and (resistive) load. micro-power shutdown. The device offers two distinct Precautions modes of operation standby mode and normal mode. The MIC7401 evaluation board does not have reverse In normal mode, the programmable switching converters polarity protection. Applying a negative voltage to the VIN can be configured to support a variety of features, and GND terminals can damage the device. The maximum including start-up sequencing, timing, soft-start ramp, operating rating for V is 5.5V. Exceeding 5.5V on the VIN IN output voltage levels, current-limit levels, and output could damage the device. discharge for each channel. In standby mode the PMIC can configured in a low power Ordering Information state by either disabling an output or by changing the Part Number Description output voltage to a lower level. Independent exit from 2 standby mode can be achieved either by I C MIC7401EV MIC7401 Evaluation Board communication or the external STBY pin. MICUSB USB Dongle The initial settings of the evaluation board are: Input: 2.4V to 5.5V Output 1: 1.8V/0.8A Output 4: 1.05V/3.0A Output 2: 1.1V/0.5A Output 5: 1.25V/1.0A Output 3: 1.8V/0.5A Output 6: 12V/0.2A Datasheets and support documentation are available on Micrels web site at: www.micrel.com. Evaluation Board B G A A) INPUT VOLTAGE B) OUTPUT VOLTAGES C) USB DONGLE CONNECTOR 2 D) I C SDA AND SCL 2 E) I C PULL-UP TO VIN F) STATUS AND CONTROL BIT HEADER F G) ENABLE E D C HyperLight Load is a registered trademark of Micrel, Inc. Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC7401 Evaluation Board Getting Started 1. Download GUI To download the GUI, select Software Package/Kit from the MIC7401 product page from the Micrel website (www.micrel.com). Users can either save the compressed installation file to hard drive or extract the compressed file using a program such as PeaZip, WinRAR, or WinZip. Then run MIC7401Install.msi to install the GUI. When the installation process is complete, click on the Windows Start button, then select All Programs to view the Start Menu. Find the new Micrel folder and click on the Serial Programmer > MIC7401 to locate the GUI program. Before you launch the GUI, the USB dongle must be connect to the PC by the USB cable, the USB dongle plugged into the evaluation board and the board powered up. 2. Set the USB Dongle and Switch Position The USB dongle has a micro switch with two positions: I2C and NOM (refer to Figure 1). To ensure the PC Figure 2. USB Dongle Connection to Evaluation Board is capable of communicating to the IC, confirm that the 2 micro switch is in the I C (or left) position. Pin 1 on the 4. Configure the GUI for Direct Editing edge connector is the ground pin, which has a square When the MIC7401 GUI Interface window appears (see solder pad. Figure 3), the connection between the computer and the USB dongle must be verified by clicking on the Test button. Target OK will appear on the bottom of the GUI window indicating it is operational. Before configuring the MIC7401, the GUI needs to be set for direct editing. To do this click on Link > Link Mode > Directing Editing. Now it is time to program the MIC7401. Save Configuration Figure 1. MIC7401 USB Dongle Micro Switch Test Button 3. Connect USB Dongle Target The USB dongle is inverted and plugged into the 4-pin OK socket (see Figure 2). Cutting off the extra pins is recommended. Next, turn on the power supply and slowly ramp up then input voltage. Now, click on the MIC7400 ICON in the Start Menu to launch the GUI. Figure 3. MIC7401 GUI Interface July 21, 2015 Revision 1.0 2