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