High-Efficiency, QuadOutput System Power Supply Controller for Notebook Computers

The ISL62386 controller generates supply voltages for battery-powered systems. The ISL62386 includes two

pulse-width modulation (PWM) controllers, adjustable from 0.6V to 5.5V, and two linear regulators, LDO5 and LDO3, that generate a fixed 5V output and a fixed 3.3V output respectively. Each can deliver up to 100mA. The Channel 2 switching regulator will automatically take over the LDO5 load when programmed to 5V output.

Features

• High Performance R3 Technology

• Fast Transient Response

• ±1 Output Voltage Accuracy: -10°C to +100°C

• Two Fully Programmable Switch-Mode Power Supplies with Independent Operation

• Programmable Switching Frequency

• Integrated MOSFET Drivers and Bootstrap Diode

• Fixed +3.3V LDO Output with Enable Control

• Fixed +5V LDO with Automatic Switchover to SMPS2

• 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

• General Purpose Switching Buck Regulators