TPS54325-Q1

www.ti.com TPS54325-Q1 SLVSAT1 – JUNE 2011 4.5-V to 18-V, 3-A OUTPUT SYNCHRONOUS STEP DOWN SWITCHER WITH INTEGRATED FET ( SWIFT™) Check for Samples: TPS54325-Q1 FEATURES 1 23 Qualified for Automotive Applications 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: 2.0 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 –120 mΩ (High Side) and 70 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 Over Current Limit Power Good Output APPLICATIONS Wide Range of Applications for Low Voltage System – Digital TV Power Supply – High Definition Blue-ray Disc™ Players – Networking Home Terminal – Digital Set Top Box (STB) DESCRIPTION The TPS54325-Q1 is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54325-Q1 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 TPS54325-Q1 uses the D-CAP2™ mode control which provides a very fast transient response with no external components. The TPS54325-Q1 also has a proprietary circuit that enables the device to adapt to bot...