ISL8225MEVAL3Z

17mm DATASHEET ISL8225M FN7822 Rev 2.00 Dual 15A/Single 30A Step-Down Power Module December 8, 2014 The ISL8225M is a fully-encapsulated step-down switching Features power supply that can deliver up to 100W output power from a Fully-encapsulated dual step-down switching power supply small 17mm square PCB footprint. The two 15A outputs may be used independently or combined to deliver a single 30A Up to 100W output from a 17mmx17mm square PCB output. Designing a high-performance board mounted power footprint supply has never been simpler -- only a few external Dual 15A or single 30A output components are needed to create a very dense and reliable Up to 95% conversion efficiency power solution. 4.5V to 20V input voltage range Automatic current sharing and phase interleaving allow up to six modules to be paralleled for 180A output capability. 1.5% 0.6V to 7.5V output voltage range output voltage accuracy, differential remote voltage sensing 1.5% output voltage accuracy with differential remote and fast transient response create a very high-performance sensing power system. Built-in output overvoltage, overcurrent and Up to six modules may be paralleled to support 180A output over-temperature protection enhance system reliability. current The ISL8225M is available in a thermally-enhanced QFN Output overvoltage, overcurrent and over-temperature package. Excellent efficiency and low thermal resistance protection permit full power operation without heat sinks or fans. In addition, the QFN package with external leads permits easy Full power operation without heat sinks or fans probing and visual solder inspection. QFN package with exposed leads permits easy probing and visual solder inspection Related Literature AN1789 ISL8225MEVAL2Z Evaluation Board User Guide Applications AN1790 ISL8225MEVAL3Z Evaluation Board User Guide Computing, networking and telecom infrastructure equipment AN1793, ISL8225MEVAL4Z Evaluation Board User Guide Industrial and medical equipment ISL8225M 110A Thermal Performance Video General purpose point-of-load (POL) power 4.5V TO 20V 1.2V AT 30A V VIN1 VOUT1 V IN OUT 4x22F VIVIN2N2 VOUT2 1k VSEN1+ R SET EN/FF1 5x100F 7.5mm OFF ON 1k EN/FF2 VSEN1- ISL8225M VSEN2- VMON1 VCC VMON2 COMP1 4.7F COMP2 470pF NOTE: ALL PINS NOT SHOWN ARE FLOATING. FIGURE 1. COMPLETE 30A STEP-DOWN POWER SUPPLY FIGURE 2. SMALL FOOTPRINT WITH HIGH POWER DENSITY FN7822 Rev 2.00 Page 1 of 34 December 8, 2014 17mm MODE SGND PGNDISL8225M Table of Contents Pinout Internal Circuit 3 Ordering Information 4 Pin Descriptions . 6 Absolute Maximum Ratings . 7 Thermal Information . 7 Recommended Operating Conditions 7 Electrical Specifications 7 Typical Performance Characteristics 10 Efficiency Performance . 10 Transient Response Performance 11 Start-up and Short Circuit Performance . 12 Typical Application Circuits 13 Application Information . 22 Programming the Output Voltage 22 Selection of Input Capacitor . 22 Selection of Output Capacitors 23 EN/FF Turn ON/OFF 23 Thermal Considerations 23 Functional Description 23 Initialization 23 Enable and Voltage Feed-forward 23 Soft-Start . 24 Power-Good 24 Current Share . 25 Overvoltage Protection (OVP) 25 Over-Temperature Protection (OTP) 25 Overcurrent Protection (OCP) 25 Frequency Synchronization and Phase Lock Loop 25 Tracking Function . 26 Mode Programming 26 Two Phase Parallel Mode Operation 27 Layout Guide . 27 Current Derating 28 Package Description 28 PCB Layout Pattern Design . 28 Thermal Vias 28 Stencil Pattern Design . 28 Derating Curves 29 Reflow Parameters 31 Revision History 32 About Intersil 32 Package Outline Drawing 33 FN7822 Rev 2.00 Page 2 of 34 December 8, 2014