DATASHEET ISL8202M FN8761 Rev.4.00 3A Single Channel High Efficiency DC/DC Step-Down Power Module Mar 17, 2017 The ISL8202M power module is a single channel synchronous Features step-down complete power supply, capable of delivering up to 3A single channel complete power supply 3A of continuous current. Operating from a single 2.6V to 5.5V input power rail and integrating controller, power inductor and - Integrates controller, MOSFETs and inductor MOSFETs, the ISL8202M only requires a few external - Pin compatible with the 5A ISL8205M components to operate and is optimized for space constrained 2.6V to 5.5V input voltage range and portable battery operated applications. Adjustable output voltage range Based on current mode PWM control scheme, the ISL8202M - As low as 0.6V with 1.6% accuracy over provides a fast transient response and excellent loop stability line/load/temperature as well as a very low duty cycle with an adjustable output -Up to 95% efficiency voltage as low as 0.6V and better than 1.6% accuracy over line and load conditions. Operation frequency is selectable through Default 1.8MHz current mode control operations an external resistor, with a 1.8MHz default setting, or may be - 680kHz to 3.5MHz resistor adjustable synchronized with an external clock signal up to 3.5MHz. The - External synchronization up to 3.5MHz ISL8202M also implements a selectable PFM mode to - Selectable light-load efficiency mode improve light-load efficiency and a 100% duty cycle LDO mode to extend battery life. A programmable soft-start reduces the - 100% duty cycle LDO mode inrush current required from the input supply while an Programmable soft-start automatic output discharge ensures a soft stop. Dedicated Soft-stop output discharge enable pin and power-good flag allow for easy system power rails sequencing. Dedicated enable pin and power-good flag An array of protection features, including input Undervoltage UVLO, over-temperature, overcurrent, overvoltage and Lockout (UVLO), over-temperature, overcurrent/short-circuit negative overcurrent protections with hiccup mode, overvoltage and negative overcurrent, - Overcurrent/short-circuit hiccup mode guarantees safe operations under abnormal operating 4.5mmx7.5mmx1.85mm 22 Ld QFN package conditions. The ISL8202M is available in a compact RoHS compliant Applications 22 Ld 4.5x7.5x1.85mm QFN package. DC to DC POL power module Related Literature C/P, FPGA and DSP power TB389, PCB Land Pattern Design and Surface Mount Portable equipment Guidelines for QFN Packages Battery operated equipment UG071, ISL8202MEVAL1Z Evaluation Board User Guide 100 ISL8202M 1.2V 3A OUTPUT 2.6V TO 5.5V INPUT 95 VIN VOUT 90 EN SW C C IN OUT 2x22F 2x22F 85 PG VSENSE SYNC COMP 80 FS FB 75 Vout=3.3V, Fsw=2MHz PWM SS R EPAD SET C FF 70 100k Vout=3.3V, Fsw=2MHz PFM R 560pF FS SGND PGND Vout=1.2V, Fsw=1.5MHz PFM 133k 65 Vout=1.2V, Fsw=1.5MHz PWM 60 00.5 11.5 22.5 3 LOAD CURRENT (A) FIGURE 1. TYPICAL APPLICATION DIAGRAM AT 5 , 1.2V , 1.5MHz f , 3A FIGURE 2. EFFICIENCY vs LOAD 5V VIN OUT SW IN FN8761 Rev.4.00 Page 1 of 25 Mar 17, 2017 EFFICIENCY (%)ISL8202M Table of Contents Functional Block Diagram 3 Pin Configuration 4 Pin Descriptions . 4 Ordering Information 5 Absolute Maximum Ratings . 6 Thermal Information . 6 Recommended Operating Conditions 6 Electrical Specifications 6 Typical Performance Characteristics . 9 Efficiency .9 Output Voltage Ripple 9 Load Transient Response . 10 Start-Up 11 Short-Circuit Protection . 12 Overvoltage Protection . 13 Power Loss . 13 Derating . 13 Functional Description 15 PWM Control Scheme 15 PFM (Skip) Mode 15 Frequency Adjust 15 Overcurrent Protection . 16 Negative Current Protection . 16 Power-Good 16 UVLO 16 Soft Start-Up 16 External Synchronization Control . 16 Enable . 16 Discharge Mode (Soft-Stop) . 16 100% Duty Cycle 16 Thermal Shutdown 16 Applications Information 16 Programming the Output Voltage 16 Recommended Switching Frequency . 17 Input Capacitor Selection . 17 Output Capacitor Selection 17 Feed-Forward Capacitor Selection 17 Typical Application Circuit 18 Thermal Consideration and Current Derating 19 PCB Layout Recommendations . 19 Package Description . 20 PCB Layout Pattern Design . 20 Thermal Vias 20 Stencil Pattern Design . 20 Reflow Parameters 20 Revision History 21 About Intersil 21 Package Outline Drawing 22 FN8761 Rev.4.00 Page 2 of 25 Mar 17, 2017