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