ISL95210HRZ-T7A Renesas

DATASHEET ISL95210 FN6938 Rev 4.00 High Efficiency 5V, 10A Buck Regulator December 15, 2011 The ISL95210 is a high-efficiency step-down regulator that can Features deliver 10A of output current from a 5V input. The small 10A Continuous Output Current 4mmx6mm QFN package and only four external components provide a very small total solution size. Low resistance internal 2.97V to 5.5V Input Voltage Range MOSFETs deliver excellent efficiency and permit full power Up to 95% Efficiency operation in a +90C ambient without airflow. Full Power Operation in +90C Ambient without Airflow The regulator operates from an input voltage of 2.97V to 5.5V, R4 Control Architecture Delivers Excellent Transient and provides a 0.6% accurate output voltage over the full Response Without Compensation operating temperature range. Intersil s patented R4 control architecture provides exceptional transient response with no Pin Selectable Output Voltage Programming external compensation components. The output voltage may 0.6% Output Voltage Accuracy Over Full Operating be programmed by an internal DAC or by an external resistor Temperature Range divider (see Output Voltage Programming on page 11 for Programmable Enhanced Light-Load Efficiency Operation more details). Output Voltage Margining and Power-good Monitor Several digital control signals provide flexibility for users that want additional features. Switching frequency, switching Small 6mmx4mm QFN Package mode, output voltage margining and daisy-chained power- good functions are all programmed by these pins. The Applications ISL95210 also includes comprehensive internal protection for Point-of-Load Power Supplies overvoltage, undervoltage, overcurrent and over-temperature Notebook Computer Power conditions. General Purpose Power Rail Generation Related Literature See AN1485, ISL95210 10A Integrated FET Regulator Evaluation Board Setup Procedure 100 95 VIN = 5V VIN PGOOD POWER GOOD PVCC 90 CIN 85 10F ISL95210 LOUT VOUT = 1.2V 80 PHASE VCC 420nH 75 EN VOUT PG IN + VCC COUT 70 FSET 220F VSEL1 CONTROL 1F 65 SIGNALS MPCT AGND MSEL 60 VSEL0 PGND VIN = 5V FCCM T-PAD 55 VOUT = 1.2V FSW = 800kHz 50 FSW= 800kHz LOUT = MPC0740LR42C (NEC/TOKIN) 01 23 45 6 7 8 9 10 COUT = 2TPLF220M5 (SANYO) IOUT (A) FIGURE 1. 10A DC/DC CONVERTER USING ONLY 4 EXTERNAL FIGURE 2. EFFICIENCY OF CIRCUIT SHOWN IN FIGURE 1 COMPONENTS (INCLUDES INDUCTOR LOSSES) FN6938 Rev 4.00 Page 1 of 20 December 15, 2011 EFFICIENCY (%)ISL95210 FN6938 Rev 4.00 Page 2 of 20 December 15, 2011 Functional Block Diagram FCCM PVCC VSEL0 SOFT-START VSEL1 DAC AND VIN MARGIN LOGIC R4 MODULATOR MSEL MPCT DEAD-TIME CONTROL & ADAPTIVE BANDGAP PHASE SHOOT- THROUGH UNDERVOLTAGE PROTECTION OVERVOLTAGE PROTECTION FREQUENCY CONTROL VCC POR THERMAL MONITOR & PROTECTION PGND EN OVERCURRENT PROTECTION VOUT PG IN FSET PGOOD PGOOD MONITOR 10 AGND VCC PVCC