EVB-EN6382QI Intel

Evaluation board user guide enpirion power solutions EN6363QI 6A PowerSoC Step-Down DC-DC Switching Converter with Integrated Inductor EVALUATION BOARD OVERVIEW 2 1 3 8 9 7 4 5 6 Figure 1: Evaluation Board (EVB) Features (Top View) NOTE A: The EN6363QI Evaluation Board is shown in Figure 1 with the important features numbered. NOTE B: The following instructions will directly correlate with the numbers shown in Figure 1. Page 1 Evaluation Board User Guide Intel Enpirion Power Solutions: EN6363QI Table 1: External Compensation Recommendations EVALUATION BOARD INSTRUCTIONS COUT 1) Input Supply (VIN) - Connect 2.7V to 6.6V supply on VIN VOUT RB CA RA RC (0805) VIN (J3). Pay attention to input polarity and do not turn on until everything is connected correctly. 1.0V 374k 18pF 2) Ground (GND) - Connect the input and output ground 1.2V 249k 15pF to GND (J4, J6). 2 x 3) Output Voltage (VOUT) - Connect the load to VOUT 3.3V 1.5V 165k 15pF 249k 10k 100F (J5). If the instructions were followed up to this point, the device may be powered on. 1.8V 124k 15pF 4) Enable (ENA) The ENABLE is pulled high to VIN 2.5V 78 .7k 12pF through an internal resistor divider. Connecting a jumper on DIS (J2) will disable the device. An external signal may 1.0V 374k 15pF be applied to the DIS (TP14) to enable (>1.8V) or disable 1.2V 249k 15pF (<0.6V) the device. 5) Output Voltage Settings (J1) - The output voltage 1.5V 165k 15pF 2 x may be adjusted quickly by placing a jumper one of the 5V 249k 10k 100F 1.8V 124k 12pF selections on J1. The voltages are pre-set by the resistors R33, R25, R18, R12, R10 which corresponds to 2.5V 78 .7k 12pF 3.3V, 2.5V, 1.8V, 1.2V and 1.0V respectively. The compensation CA may be adjusted according to Table 1 3.3V 54 .9k 10pF for best results. The output voltage may also be adjusted to any voltage as indicated by the equation for 7) Soft Start Capacitor (CSS) The soft start capacitor R shown in Figure 2. B (C7) is 15nF by default and can be between 10nF to 100nF. The output rise time is controlled by C . The SS EN6363QI voltage rise time calculation is shown: V OUT VOUT Rise Time t ms = C nF x 0.13 RISE ss R A C OUT C = 10nF t 1.3ms C SS RISE A 249k (200F 400F) (10pF 47pF) PGND C = 100nF t 13ms SS RISE R C 10k 8) Bulk Capacitors The EN6363QI may support up to V = 0.6V FB VFB 400F on the output, but the compensation should be adjusted accordingly. Using Table 1 as the reference for V x FB R A R = B C , if C is increased, then the C should also be A OUT A V - V OUT FB increased. The relationship is linearly shown below: AGND C +100F C +10pF OUT A The recommended maximum output capacitance Figure 2: VOUT Resistor Divider & Compensation (C ) is 400F and phase-lead capacitance (C ) OUT MAX A MAX Capacitor is 47pF 6) Power OK (POK) - This is the open drain Power OK 9) Output Ripple Measurement (SMA1) A SMA cable flag, which is pulled high to AVIN internally by a 100k may be connected to SMA1 to measure the AC coupled resistance. When VOUT is over within 10% of output ripple. regulation, POK will be pulled high to AVIN. Page 2