The ISL8023, ISL8024 are highly efficient, monolithic, synchronous step-down DC/DC converters that can deliver 3A (ISL8023) or 4A (ISL8024) of continuous output current from a 2.7V to 5.5V input supply. The devices use current mode control architecture to deliver very low duty cycle operation at high frequency with fast transient response and excellent loop stability.

FEATUREs
• 2.7V to 5.5V Input Voltage Range
• Very Low On-Resistance FET’s - P-Channel 45mΩ and N-channel 19mΩ Typical Values
• High Efficiency Synchronous Buck Regulator with up to 95% Efficiency
• 0.8% Reference Accuracy Over-temperature/Load/Line
• Complete BOM with as Few as 3 External Parts
• Start-up with Pre-Biased Output
• Internal Soft-Start - 1ms or Adjustable
• Soft-Stop Output Discharge During Disabled
• Adjustable Frequency from 500kHz to 4MHz - Default at 1MHz (8023/24), 2MHz (8023A/24A)
• External Synchronization up to 4MHz
• Over-temperature, Overcurrent, Overvoltage and Negative Overcurrent Protection
• Tiny 3x3 QFN Package

APPLICATIONs
• DC/DC POL Modules
• μC/µP, FPGA and DSP Power
• Plug-in DC/DC Modules for Routers and Switchers
• Portable Instruments
• Test and Measurement Systems
• Li-ion Battery Powered Devices