TPS54326

www.ti.com TPS54326 SLVSA13E – OCTOBER 2009 – REVISED JUNE 2012 4.5V to 18V Input, 3-A Synchronous Step-Down Converter with Eco-mode™ Check for Samples: TPS54326 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 - 120 mΩ (High Side) and 70 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 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) DESCRIPTION The TPS54326 is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54326 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 TPS54326 uses the D-CAP2™ mode control which provides a fast transient response with no external components. The adoptive on-time control supports seamless operation between PWM mode at heavy loa...