TPS54225

TPS54225 www.ti.com SLVSA15C – OCTOBER 2009 – REVISED FEBRUARY 2011 4.5V to 18V Input, 2-A Synchronous Step-Down SWIFTTM Converter Check for Samples: TPS54225 FEATURES 1 23 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 High Initial Bandgap Reference Accuracy Adjustable Soft Start Pre-Biased Soft Start 700-kHz Switching Frequency (fSW) Cycle-By-Cycle Overcurrent Limit Power Good Output 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) space DESCRIPTION The TPS54225 is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54225 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 TPS54225 uses the D-CAP2™ mode control which provides a fast transient response with no external compensation components. The TPS54225 also has a proprietary circuit that enables the device to adapt to both low equivalent series resistance (ESR) o...