High-Efficiency, Triple-Output System Power Supply Controller for Notebook Computers

The ISL62391, ISL62392, ISL62391C and ISL62392C controller generate supply voltages for battery-powered systems. It includes two pulse-width modulation (PWM) controllers, adjustable from 0.6V to 5.5V, and a linear regulator (LDO3) that generates a fixed 3.3V and can deliver up to 100mA. The ISL62391, ISL62392, ISL62391C and ISL62392C include on-board power-up sequencing, a power-good (PGOOD) output, digital soft-start, and internal soft-stop output discharge that prevents negative voltages on shutdown.

Features

• High Performance R3 Technology

• Fast Transient Response

• ±1 Output Voltage Accuracy

• 2 Fully Programmable Switch-Mode Power Supplies

• Programmable Switching Frequency

• Fixed 3.3V LDO Output

• Internal Soft-Start and Soft-Stop Output Discharge

• Wide Input Voltage Range: 5.5V to 25V

• Full and Ultrasonic Pulse-Skipping Mode

• Power-Good Indicator

• Overvoltage, Undervoltage and Overcurrent Protection

• Thermal Monitor and Protection

• Pb-Free (RoHS Compliant)

Applications

• Notebook and Sub-Notebook Computers

• PDAs and Mobile Communication Devices

• 3-Cell and 4-Cell Li+ Battery-Powered Devices