USERS MANUAL ISL8205MEVAL1Z UG072 Rev 0.00 Evaluation Board User Guide May 3, 2016 The ISL8205M power module is a single channel synchronous Features step-down complete power supply, capable of delivering up to 2.6V to 5.5V input voltage range 5A of continuous current. Operating from a single 2.6V to 5.5V input power rail and integrating a controller, power inductor Adjustable output voltage as low as 0.6V with 1.6% and MOSFETs, ISL8205M can achieve up to 95% conversion accuracy over line/load/temperature efficiency. It also provides fast transient response with Default 1.8MHz current mode control operations excellent loop stability as well as deliver output voltage as low - 680kHz to 3.5MHz resistor adjustable as 0.6V. Switching frequency is also adjustable from 680kHz - External synchronization up to 3.5MHz to 3.5MHz with either external resistor or SYNC clock option. - Selectable light-load efficiency mode Selectable PFM mode can also be enabled to boost up light load efficiency to extend battery life. Other features include - 100% duty cycle LDO mode programmable soft-start, soft-stop, input undervoltage Programmable soft-start and soft-stop output discharge lockout, 100% duty cycle operation, over-temperature, overcurrent/short-circuit with hiccup mode, overvoltage and Dedicated enable pin and power-good flag negative overcurrent protection. It also has a dedicated enable UVLO, over-temperature, overcurrent, overvoltage and pin and power-good flag that allow for easy system power rails negative overcurrent protections sequencing. The ISL8205MEVAL1Z evaluation board is designed to Specifications/Default Set-Up demonstrate the performance of the ISL8205M. The board is V = 2.6V to 5.5V IN by default set to be 1.2V output voltage with 1.6MHz switching frequency. Other output voltage values can be easily set by V options (via jumper selection): 1V, 1.2V, 2.5V, 3.3V OUT changing the jumper position. Switching frequency can be MAX I up to 5A OUT adjusted by changing the FS pin resistor. f = 1.6MHz by default SW Set to PWM mode by default References 1ms soft-start time by default ISL8205M datasheet Ordering Information PART NUMBER DESCRIPTION ISL8205MEVAL1Z ISL8205M single 5A power module evaluation board FIGURE 1. ISL8205MEVAL1Z BLOCK DIAGRAM UG072 Rev 0.00 Page 1 of 11 May 3, 2016ISL8205MEVAL1Z TABLE 1. ISL8205M COMPONENT SELECTION GUIDE MATRIX V (V) V (V) f (MHz) C (F) C (F) R (k )R (k )C (pF) IN OUT SW IN OUT 7 SET FF 5 0.6 0.8 2x22 1x100 261 OPEN 390 5 0.9 1.2 2x22 3x22 169 200 560 5 1 1.3 2x22 3x22 154 150 560 5 1 1.3 2x22 2x22 154 150 820 5 1.2 1.6 2x22 2x22 124 100 820 5 1.5 1.7 2x22 2x22 115 66.5 560 5 1.8 2 2x22 2x22 95.3 49.9 470 5 2.5 2.5 2x22 2x22 75 31.6 330 5 3.3 3 2x22 2x22 59 22.1 330 3.3 0.6 0.8 2x22 1x100 261 OPEN 390 3.3 0.9 1.2 2x22 3x22 169 200 560 3.3 1 1.3 2x22 3x22 154 150 560 3.3 1 1.3 2x22 2x22 154 150 820 3.3 1.2 1.6 2x22 2x22 124 100 820 3.3 1.5 1.7 2x22 2x22 115 66.5 560 3.3 1.8 2 2x22 2x22 95.3 49.9 470 3.3 2.5 2.5 2x22 2x22 75 31.6 330 FIGURE 3. BOTTOM OF BOARD FIGURE 2. TOP OF BOARD boost light-load efficiency, ISL8205M can also be configured to Recommended Equipment operate in PFM mode by pulling the SYNC pin to SGND. Peak 0V to 5.5V power supply with at least 7A source current current mode control scheme is implemented for fast transient capability response. The module utilizes internal compensation to stabilize the system and optimize transient response, which greatly Electronic load capable of sinking current up to 5A simplifies the application. Other excellent features include Digital Multimeters (DMMs) external synchronization, 100% duty cycle operation and very low quiescent current. For further information, please refer to the 100MHz quad-trace oscilloscope ISL8205M datasheet. Functional Description Quick Start The ISL8205M is a single 5A step-down high efficiency power The ISL8205MEVAL1Z is set to be V = 1.2V, f = 1.6MHz by module optimized for FPGA, DSP and Li-ion battery power OUT SW default. For other V options, the recommended f needs to devices. The module switches at 1.8MHz by default when the FS OUT SW be adjusted by changing resistor (R ) connected to the FS pin. pin is shorted to VIN. The switching frequency is also adjustable 7 from 680kHz to 3.5MHz through a resistor from FS to SGND. To UG072 Rev 0.00 Page 2 of 11 May 3, 2016