TPS54329

TPS54329 www.ti.com SLVSAZ6A – SEPTEMBER 2011 – REVISED MARCH 2012 4.5V to 18V Input, 3-A SYNCHRONOUS STEP DOWN CONVERTER Check for Samples: TPS54329 FEATURES 1 23 D-CAP2™ Mode Enables Fast Transient Response Low Output Ripple and Allows Ceramic Output Capacitor Wide VIN Input Voltage Range: 4.5 V to 18 V Output Voltage Range: 0.76 V to 7.0 V Highly Efficient Integrated FETs Optimized for Lower Duty Cycle Applications – 100 mΩ (High Side) and 74 mΩ (Low Side) High Efficiency, Less Than 10 μA at Shutdown High Initial Bandgap Reference Accuracy Adjustable Soft Start Pre-Biased Soft Start 650-kHz Switching Frequency (fSW) Cycle By Cycle Over Current Limit DESCRIPTION The TPS54329 is an adaptive on-time D-CAP2™ mode synchronous buck converter. TheTPS54329 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 TPS54329 uses the D-CAP2™ mode control which provides a fast transient response with no external compensation components. The TPS54329 also has a proprietary circuit that enables the device to adopt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultralow ESR ceramic capacitors. The device operates from 4.5-V to 18-V VIN input. The output voltage can be programmed between 0.76 V and 7 V. The device also features an adjustable soft start time. The TPS54329 is av...