1

FEATURES

APPLICATIONS

DESCRIPTION

TYPICAL APPLICATION CIRCUIT

TRAN

VFB

EN

TRIP

DRVL

SW

DRVH

GND

PGOOD

VBST

1

3

4

5

2

6

10

7

8

9

V5IN

EN

VID1

VID0

V5IN

TPS1217

V

_GND

OUT

TPS51217

HIGH PERFORMANCE, SINGLE SYNCHRONOUS STEP-DOWN

CONTROLLER FOR NOTEBOOK POWER SUPPLY

• Notebook Computers

2

• Wide Input Voltage Range: 3 V to 28 V

• I/O Supplies

• Output Voltage Range: 0.6 V to 2.6 V

• System Power Supplies

• Wide Output Load Range: 0 to 20A+

• Built-in 0.5% 0.6 V Reference

• D-CAP™ Mode with 100-ns Load Step

The TPS51217 is a small-sized single buck controller

Response

with adaptive on-time D-CAP™ mode. The device is

• Adaptive On Time Control Architecture with

suitable for low output voltage, high current, PC

Fixed 340kHz Operation

system power rail and similar point-of-load (POL)

• Dynamic Output Voltage Change Capability

power supply in digital consumer products. A small

package with minimal pin-count saves space on the

• 4700 ppm/°C R

PCB, while a dedicated EN pin and pre-set frequency

• Internal 0.9-ms Voltage Servo Softstart

minimize design effort required for new designs. The

• Pre-Charged Start-up Capability

skip-mode at light load condition, strong gate drivers

• Built-in Output Discharge

low-loss and high efficiency, over a broad load range.

• Power Good Output

The

TRAN

pin

provides

freedom

of

masking

• Integrated Boost Switch

overvoltage protection, undervoltage protection and

power-good signal during the transition period of

• Built-in OVP/UVP/OCP

dynamic output voltage change for modern GPU

• Thermal Shutdown (Non-latch)

power supply applications. The conversion input

• SON-10 (DSC) Package

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.

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

D-CAP is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2009, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.