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