MIC7400 Evaluation Board Configurable PMIC, Five-Channel Buck Regulator plus One-Boost with 2 HyperLight Load and I C Control General Description Requirements The MIC7400 is a powerful, highly-integrated, The MIC7400 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. The (resistive) load. device offers two distinct modes of operation standby Precautions mode and normal mode. The MIC7400 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 MIC7400EV MIC7400 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 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 G) POR MSB SETTING BIT HyperLight Load is a registered trademark and Hyper Speed Control is a 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. MIC7400 Evaluation Board Getting Started 1. Download GUI To download the GUI, select Software Package/Kit from the MIC7400 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. 2. Set the USB Dongle and Switch Position The USB dongle features a micro switch with two positions: I2C and NOM (refer to Figure 1). To ensure the PC is capable of communicating to the IC, 2 confirm that the micro switch is in the I C (or left) position. Pin 1 on the edge connector is the ground 2 pin, which has a square solder pad. The I C dongle can be plugged into the MIC7400 evaluation board before or after the IC is powered on. Figure 2. USB Dongle Connection to Evaluation Board 4. Configure the GUI for Direct Editing When the MIC7400 GUI Interface window appears (see 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 MIC7400, setting the GUI for direct editing is required using. This is accomplished by clicking Link > Link Mode > Directing Editing. Figure 1. MIC7400 USB Dongle Micro Switch 3. Connect USB Dongle Before the GUI can be launched, the Micrel USB dongle must be connected to the PC via the USB cable. After connecting, click on the MIC7400 icon to start the GUI. Turn on the power supply and slowly ramp up then input voltage. Note: The USB dongle board is inverted and plugged into the 4-pin socket (see Figure 2). Cutting off the extra pins is recommended. Figure 3. MIC7400 GUI Interface July 1, 2015 Revision 1.0 2