TPS54226RGTR

4.5V至18V输入， 2 -A同步降压型转换器SWIFTTM与生态Modeâ ?? ¢ 4.5V to 18V Input, 2-A Synchronous Step-Down SWIFTTM Converter with Eco-Mode™

DESCRIPON

The TPS54226 is a adaptive on-time D-CAP2™ mode synchronous buck converter. TheTPS54226 enables system designers to complete the suite of various end equipment’s power bus regulators with a cost effective, low component count, low standby current solution. The main control loop for the TPS54226 uses the D-CAP2™ mode control which provides a fast transient response with no external compensation components. The adoptive on-time control supports seamless operation between PWM mode at heavy load condition and reduced frequency Eco-Mode™ operation at light load for high efficiency.

FEATURES

• D-CAP2™ Mode Enables Fast Transient Response

• Low Output Ripple and Allows Ceramic Output Capacitor

• Wide VCC Input Voltage Range: 4.5 V to 18 V

• Wide VIN Input Voltage Range: 2 V to 18 V

• Output Voltage Range: 0.76 V to 5.5 V

• Highly Efficient Integrated FET’s Optimized for Lower Duty Cycle Applications

   – 160 mΩ High Side and 110 mΩ Low Side

• High Efficiency, less than 10 μA at shutdown

• Auto-Skip Eco-Mode™ for High Efficiency at Light Load

• High Initial Bandgap Reference Accuracy

• Adjustable Soft Start

• Pre-Biased Soft Start

• 700-kHz Switching Frequency fSW

• Cycle By Cycle Over Current Limit

• Power Good Output

• Auto-Skip Mode

APPLICATIONS

• Wide Range of Applications for Low Voltage System

   – Digital TV Power Supply

   – High Definition Blu-ray Disc™ Players

   – Networking Home Terminal

   – Digital Set Top Box STB