USERS MANUAL ISL8202MEVAL1Z UG071 Rev.0.00 Evaluation Board May 3, 2016 The ISL8202M power module is a single-channel synchronous Key Features step-down complete power supply, capable of delivering up to 3A of continuous current. Operating from a single 2.6V to 5.5V 2.6V to 5.5V input voltage range input power rail and integrating a controller, power inductor Adjustable output voltage as low as 0.6V with 1.6% and MOSFETs, the ISL8202M can achieve up to 95% accuracy over line/load/temperature conversion efficiency. It also provides fast transient response Default 1.8MHz current mode control operations with excellent loop stability, and can deliver output voltage as - 680kHz to 3.5MHz resistor adjustable low as 0.6V. Switching frequency is also adjustable from - External synchronization up to 3.5MHz 680kHz to 3.5MHz with either external resistors or the SYNC clock option. The selectable PFM mode can also be enabled to - Selectable light-load efficiency mode boost up light-load efficiency to extend battery life. Other - 100% duty cycle LDO mode features include programmable soft-start, soft-stop, input Programmable soft-start and soft-stop output discharge undervoltage lockout, 100% duty cycle operation, over-temperature, overcurrent/short-circuit with hiccup mode, Dedicated enable pin and power-good flag and overvoltage and negative overcurrent protection. The UVLO, over-temperature, overcurrent, overvoltage and ISL8202M also has a dedicated enable pin and power-good negative overcurrent protections flag that allows for easy system power rails sequencing. The ISL8202MEVAL1Z evaluation board is designed to Specifications/Default Set-Up demonstrate the performance of the ISL8202M. By default, V = 2.6V to 5.5V the board is set with a 1.2V output voltage with 1.5MHz IN switching frequency. Other output voltage values can be easily V options (via jumper selection): 1V, 1.2V, 2.5V, 3.3V OUT set by changing the jumper position. Switching frequency can MAX I up to 3A OUT be adjusted by changing the FS pin resistor. f = 1.5MHz by default SW References Set to PWM mode by default 1ms soft-start time by default ISL8202M datasheet Ordering Information PART NUMBER DESCRIPTION ISL8202MEVAL1Z ISL8202M single 3A power module evaluation board FIGURE 1. ISL8202MEVAL1Z BLOCK DIAGRAM UG071 Rev.0.00 Page 1 of 9 May 3, 2016ISL8202MEVAL1Z TABLE 1. ISL8202M 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 3x22 261 OPEN 680 5 0.9 1.2 2x22 3x22 169 200 680 5 1 1.3 2x22 2x22 154 150 820 5 1.2 1.5 2x22 2x22 130 100 680 5 1.5 1.9 2x22 2x22 102 66.5 390 5 1.8 2 2x22 2x22 95.3 49.9 390 5 2.5 2 2x22 2x22 95.3 31.6 220 5 3.3 2 2x22 2x22 95.3 22.1 390 3.3 0.6 0.8 2x22 3x22 261 OPEN 680 3.3 0.9 1.2 2x22 3x22 169 200 680 3.3 1 1.3 2x22 2x22 154 150 820 3.3 1.2 1.5 2x22 2x22 130 100 680 3.3 1.5 1.9 2x22 2x22 102 66.5 390 3.3 1.8 2 2x22 2x22 95.3 49.9 390 3.3 2.5 2 2x22 2x22 95.3 31.6 220 FIGURE 2. TOP OF BOARD FIGURE 3. BOTTOM OF BOARD transient response. The module utilizes internal compensation to Recommended Equipment stabilize the system and optimize transient response, which 0V to 5.5V power supply with at least 5A source current greatly simplifies the application. Other excellent features capability include external synchronization, 100% duty cycle operation, and very low quiescent current. For more information, refer to the Electronic load capable of sinking current up to 3A ISL8202M datasheet. Digital Multimeters (DMMs) 100MHz quad-trace oscilloscope Quick Start The ISL8202MEVAL1Z is set to be V = 1.2V, f = 1.5MHz by OUT SW Functional Description default. For other V options, the recommended f needs to OUT SW be adjusted by changing resistor (R ) connected to the FS pin. The ISL8202M is a single 3A step-down high efficiency power 7 Please refer to Table 1 for more information. The following module optimized for FPGA, DSP, and Li-ion battery power operation procedure will be based on default settings. devices. The module switches at 1.8MHz by default when the FS pin is shorted to V . The switching frequency is also adjustable IN 1. Before applying power to input, ensure one shorting jumper from 680kHz to 3.5MHz through a resistor from FS to SGND. To on J1 across pins 5 and 6 is present. This selects the boost light-load efficiency, the ISL8202M can also be configured V = 1.2V option. OUT to operate in PFM mode by pulling the SYNC pin to SGND. The 2. Set the ENABLE switches SW1 to the OFF position. peak current mode control scheme is implemented for fast UG071 Rev.0.00 Page 2 of 9 May 3, 2016