PWM Buck DC-DC and Triple Linear Power Controller

The ISL6521 provides the power control and protection for four output voltages in low-voltage, high-performance applications. The IC integrates a voltage-mode PWM controller and three linear controllers, as well as monitoring and protection functions into a 16-lead SOIC package.

Features
• Provides 4 Regulated Voltages
    - Switching Regulator 20A Capable
    - Three Linear Regulators
    - Capable of 120mA
    - Capable of up to 3A with an External Transistor
• Externally Resistor-Adjustable Outputs
• Simple Single-Loop Control Design
    - Voltage-Mode PWM Control
• Fast PWM Converter Transient Response
    - High-Bandwidth Error Amplifier
    - Full 0% to 100% Duty Ratio
• Excellent Output Voltage Regulation
    - All Outputs: ±2% Over Temperature
• Overcurrent Fault Monitors
    - Switching Regulator Does Not Require Extra Current
        Sensing Element, Uses MOSFET’s rDS(ON)
• Small Converter Size
    - 300kHz Constant Frequency Operation
    - Small External Component Count
• Commercial and Industrial Temperature Range Support
• Pb-free Available (RoHS Compliant)

Applications
• FPGA and PowerPC™-based boards
• General purpose, low voltage power supplies