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1FEATURES

2? Wide Input Voltage Range: 3 V to 28 V

? Output Voltage Range: 0.6 V to 2.6 V

? Wide Output Load Range: 0 to 20A+

? Built-in 0.5% 0.6 V Reference

? D-CAP? Mode with 100-ns Load Step

Response

? Adaptive On Time Control Architecture with

Fixed 340kHz Operation

? Dynamic Output Voltage Change Capability

? 4700 ppm/°C RDS(on) Current Sensing

? Internal 0.9-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 TPS51217 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

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 TRAN pin provides freedom of masking

overvoltage protection, undervoltage protection and

power-good signal during the transition period of

dynamic output voltage change for modern GPU

power supply applications. 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 0.6 V to 2.6 V. The device requires an

external 5-V supply. The TPS51217 is available in a

10-pin SON package specified from –40°C to 85°C.