USERS MANUAL ISL8003xDEMO1Z UG047 Rev.2.00 Demonstration Boards October 24, 2016 Description Key Features The ISL80030xDEMO1Z and ISL80031xDEMO1Z boards are Small, compact design intended for use by individuals with requirements for V range of 2.7V to 5.5V IN point-of-load applications sourcing from 2.7V to 5.5V. The I maximum is 3A OUT ISL8003xDEMO1Z boards are used to demonstrate the performance of the ISL80030, ISL80031, ISL80030A, and Negative current protection ISL80031A low quiescent current mode converters. Internal soft-start and soft-stop These devices are offered in an 8 Ld 2mmx2mm DFN package Overcurrent and short-circuit protection with 1mm maximum height. The complete converter occupies Over-temperature/thermal protection 2 less than 64mm area. References Specifications ISL80030, ISL80030A, ISL80031, ISL80031A Datasheet These boards have been configured and optimized for the following operating conditions: Ordering Information V = 2.7V to 5.5V IN PART NUMBER DESCRIPTION V = 1.8V OUT ISL80030DEMO1Z 3A, PWM, 1MHz demonstration board I = 3A (maximum) OUT ISL80031DEMO1Z 3A, PFM, 1MHz demonstration board Up to 95% peak efficiency ISL80030ADEMO1Z 3A, PWM, 2MHz demonstration board ISL80031ADEMO1Z 3A, PFM, 2MHz demonstration board ISL80030, ISL80031, ISL80030A, ISL80031A L 1 8 VIN PHASE VOUT VIN C C 1 3 GND GND 2 77 PGND VIN C 5 3 6 EN PGND EN R 1 4 5 PG FB PG EPAD R 2 9 FIGURE 1. BLOCK DIAGRAM UG047 Rev.2.00 Page 1 of 6 October 24, 2016ISL8003xDEMO1Z frequency, thereby providing superior transient response and Test Steps allowing for the use of a small inductor. 1. Ensure that the circuit is correctly connected to the supply and loads prior to applying any power. PCB Layout Guidelines 2. Connect the bias supply to VIN, the plus terminal to VIN (TP1) The PCB layout is a very important converter design step to make and negative return to PGND (TP2). sure the designed converter works well. The power loop is 3. Connect the output load to VO (TP3) and the negative return , composed of the output inductor Ls, the output capacitor C OUT to PGND (TP4). the PHASE pins and the PGND pin. It is necessary to make the 4. Turn on the power supply. power loop as small as possible and the connecting traces among them should be direct, short and wide. The switching 5. Verify the output voltage is 1.8V for V . OUT node of the converter, the PHASE pins and the traces connected to the node are very noisy, so keep the voltage feedback trace Functional Description away from these noisy traces. The input capacitor should be placed as close as possible to the VIN pin and the ground of the The ISL8003xDEMO1Z boards provide a simple platform to evaluate performance of the ISL80030, ISL80031, ISL80030A input and output capacitors should be connected as close as possible. The heat of the IC is mainly dissipated through the and ISL80031A. thermal pad. Maximizing the copper area connected to the These devices are highly efficient, monolithic, synchronous thermal pad is preferable. In addition, a solid ground plane is step-down DC/DC converters that can deliver up to 3A of helpful for better EMI performance. It is recommended to add at continuous output current from a 2.7V to 5.5V input supply. They least 4 vias ground connection within the pad for the best use peak current mode control architecture to allow very low duty thermal relief. cycle operation. The devices operate at 1MHz (ISL80030, ISL80031) and 2MHz (ISL80030A and ISL80031A) switching FIGURE 2. ISL80030DEMO1Z TOP SIDE FIGURE 3. ISL80030DEMO1Z BOTTOM SIDE FIGURE 4. ISL80031DEMO1Z TOP SIDE FIGURE 5. ISL80031DEMO1Z BOTTOM SIDE UG047 Rev.2.00 Page 2 of 6 October 24, 2016