TPS51218

TPS51218 www.ti.com SLUS935B – MAY 2009 – REVISED FEBRUARY 2012 HIGH PERFORMANCE, SINGLE SYNCHRONOUS STEP-DOWN CONTROLLER FOR NOTEBOOK POWER SUPPLY Check for Samples: TPS51218 FEATURES 1 2 Wide Input Voltage Range: 3 V to 28 V Output Voltage Range: 0.7 V to 2.6 V Wide Output Load Range: 0 to 20A+ Built-in 0.5% 0.7 V Reference D-CAP™ Mode with 100-ns Load Step Response Adaptive On Time Control Architecture With 4 Selectable Frequency Setting 4700 ppm/°C RDS(on) Current Sensing Internal 1-ms Voltage Servo Softstart Pre-Charged Start-up Capability Built in Output Discharge Power Good Output Integrated Boost Switch Built-in OVP/UVP/OCP Thermal Shutdown (Non-latch) SON-10 (DSC) Package APPLICATIONS Notebook Computers I/O Supplies System Power Supplies DESCRIPTION The TPS51218 is a small-sized single buck controller with adaptive on-time D-CAP™ mode. The device is suitable for low output voltage, high current, PC system power rail and similar point-of-load (POL) power supply in digital consumer products. A small package with minimal pin-count saves space on the PCB, while a dedicated EN pin and pre-set frequency selections minimize design effort required for new designs. The skip-mode at light load condition, strong gate drivers and low-side FET RDS(on) current sensing supports low-loss and high efficiency, over a broad load range. The conversion input voltage which is the high-side FET drain voltage ranges from 3 V to 28 V and the output volt...