The ISL6439AIBZ is a high-performance, dual-output PWM controller optimized for converting battery voltage or regulated 5V to the supply voltages required by notebook computers and other portable systems. It integrates two PWM controllers, adjustable from 3.3V down to 0.6V, which provide the CPU core and chipset rails. This device greatly simplifies power supply design while offering high efficiency and tight regulation.

Applications:

• Notebook and laptop computers
• Handheld devices
• Portable power supplies
• General purpose DC-DC conversion

Features:

• Dual Output PWM Controller: Provides independent control for two voltage rails.
• Adjustable Output Voltage: Regulates output from 3.3V down to 0.6V to support a wide range of processors and chipsets.
• High Efficiency: Optimized for high efficiency conversion, minimizing power loss and extending battery life.
• Overcurrent Protection: Protects the load and power supply from damage due to excessive current draw.
• Undervoltage Protection: Monitors the output voltage and shuts down the converter if the voltage falls below a safe level.
• Soft-Start Function: Limits inrush current during startup, preventing voltage overshoot and stress on components.
• Adjustable Switching Frequency: Allows optimization of efficiency and component size.

Benefits:

• Simplified Power Supply Design: Integrates multiple functions into a single chip, reducing component count and board space.
• High Efficiency Operation: Maximizes battery life in portable applications.
• Robust Protection Features: Protects against overcurrent, undervoltage, and overtemperature conditions.
• Flexible Output Voltage: Supports a wide range of processors and chipsets.
• Improved System Reliability: Soft-start and other protection features enhance system reliability.

Additional Details:

The ISL6439AIBZ operates at a switching frequency that can be adjusted to optimize efficiency and component size. It incorporates overcurrent protection to prevent damage during overload conditions. The device also provides undervoltage protection, ensuring stable and reliable operation even when the input voltage fluctuates. The soft-start feature minimizes inrush current during startup, reducing stress on components. The ISL6439AIBZ is available in a compact package, making it suitable for space-constrained applications.

Specifications:

• Input Voltage: 4.5V to 25V
• Output Voltage: Adjustable from 0.6V to 3.3V
• Switching Frequency: Adjustable
• Operating Temperature: -40°C to +85°C