Integrated-Power Buck Converter Controller with Synchronous Rectification

The HIP5020 is a high-efficiency, buck converter controller with synchronous rectification and integral power MOSFETs. Integrated current sensing eliminates the external resistor and saves power. The controller combines two methods of regulation: Current mode control for outstanding regulation response to large signal load transients, and Hysteretic mode control for high efficiency at low output currents.

Features

• High Efficiency - Above 95

• Integrated N-Channel Synchronous Rectifier and Upper MOSFETs - 75mΩ Each

• Wide Input Voltage and Load Range

- 4.5VDC to 18VDC (5 to 12 NiCd Battery Cells)

- Up to 3.5ADC

• Automatically Switches Regulation Mode

- Current Mode Control for Excellent Performance at High Load Currents

- Hysteretic Control for High Efficiency at Light Load Currents

• Flexible and Easy to Use

- Ready-to-Use Example Applications

- Custom Optimization with Small Components

- Design and Simulation Software Available

• Integrated, Low-Loss Current Sensing

• Over-Current Protection

• Adaptive Dead-Time - Eliminates Shoot-Through

• 100kHz to 1MHz PWM Switching Frequency

• Thermally Enhanced SOIC Package

Applications

• Notebook Computers

• Portable Telecommunications

• Portable Instruments