Enpirion Power Evaluation Board User Guide EN5319QI PowerSoC EN5319QI 1.5A Synchronous DC/DC Converter Evaluation Board User Guide Introduction Thank you for choosing Altera Enpirion power products This evaluation board user guide applies to the EN5319 devices mounted on PCBs with the part number 08251 rev A on the backside. This user guide should be used together with the latest device datasheet. The datasheet can be found at www.altera.com/enpirion. Following are the features of this evaluation board. Populated with one EN5319QI 1.5A PowerSoC with integrated inductor. Pre-tinned pads are available for a wide range of input and output capacitor configurations. There are four positions available for the output capacitors. The first position, closest to the IC, can accommodate a 1206, 0805, or 0603 case size while the other three positions can accommodate either 0805 or 0603 capacitor case sizes. The base output capacitor configuration is 2 x 22uF 0603 MLCC. Refer to the product datasheet for output capacitor requirements. There are two positions for the input capacitors. The first position, closest to the IC, can accommodate an 0805 or 0603 case size while the other position can accommodate an 0805 case size. The base input capacitor configuration is a single 10uF 0805 MLCC. Refer to the product datasheet for input capacitor requirements. Output voltage programming is accomplished via a simple resistor divider. Jumpers are provided for 4 pre-configured output settings. These settings are as follows: 1.0V, 1.2V, 1.5V, 1.8V Easy jumpers are provided for the following signals: Enable Numerous test points are provided as well as clip leads for input and output connections The board comes with input decoupling and reverse polarity protection. Page 1 of 6 www.altera.com/enpirion Enpirion Power Evaluation Board User Guide EN5319QI PowerSoC Quick Start Guide Figure 1 shows a photograph of the evaluation board. Please refer to this figure while configuring the board for evaluation. STEP 1: Set the ENABLE jumper to the Disable Position. ENABLE DISABLE STEP 2: Select the desired VOUT voltage setting by placing the jumper J2 on the correct jumper pin. Figure below shows the VOUT jumper options and their nominal voltages. Note that depending on the tolerance of the resistors populated on the board, each output voltage setting may have a larger tolerance than just the VFB pin as specified in the datasheet. Please see Figure 3 and the Bill of Materials section. Multiple jumpers can be populated to get other output voltages not listed below. With the resistors shown below, if all 4 jumper positions are populated, the output voltage will be approximately 3.7V. Note that for any VOUT higher than 3.3V, the output capacitors need to be changed to 2 x 22uF/0805. CAUTION: the VOUT jumper settings can only be changed when the device is off. Failure to follow this guideline may result in damage to the part. Please note: The loop compensation circuit for this evaluation board has been chosen for a wide range of VIN and V values. In order to optimize the loop for OUT any specific VIN/V operating point, please see the compensation table in the OUT datasheet. See Figures 1 and 3. STEP 3: Connect a Power Supply to the input power connectors, VIN (J4) and GND (J5). DO NOT turn the power supply on yet. Page 2 of 6 www.altera.com/enpirion