TPS51219

www.ti.com TPS51219 SLUSAG1B – MARCH 2011 – REVISED OCTOBER 2011 High Performance, Single-Synchronous Step-Down Controller with Differential Voltage Feedback FEATURES 1 23 Differential Voltage Feedback DC Compensation for Accurate Regulation Wide Input Voltage Range: 3 V to 28 V Output Voltage Range: 0.5 V to 2.0 V with Fixed Options of 1.05 V and 1.00 V Wide Output Load Range: 0 A to 20 A+ Adaptive On-Time Modulation with Selectable Control Architecture and Frequency – D-CAP™ Mode at 300 kHz/400 kHz for Fast Transient Response – D-CAP2™ Mode at 500 kHz/670 kHz for Ceramic Output Capacitor 4700 ppm/°C, Low-Side RDS(on) Current Sensing RSENSE Accurate Current Sense Option Internal, 1-ms Voltage Servo Softstart Built-In Output Discharge Power Good Output Integrated Boost Switch Built-In OVP/UVP/OCP Thermal Shutdown (Non-latched) 3 mm × 3 mm, 16-Pin, QFN (RTE) Package APPLICATIONS Notebook Computers I/O Supplies DESCRIPTION The TPS51219 is a small-sized single buck controller with adaptive on-time control. It provides a choice of control modes (D-CAP™ or D-CAP2™) to meet a wide range of system requirements. It is designed for tight DC regulation requirements such as the VCCIO application for Intel® notebooks. The performance and flexibility of the TPS51219 makes it suitable for low output voltage, high current, PC system power rails and similar point-of-load (POL) power supplies. Differential voltage feedback and the voltage compensation funct...