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1FEATURES

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 voltage ranges from 0.7 V to 2.6 V.

The device requires an external 5-V supply. The TPS51218 is available in a 10-pin SON package

specified from –40°C to 85°C.