1

2

3

4

10

9

8

7

VBST

DRVH

SW

V5IN

PGOOD

TRIP

EN

VFB

TPS51218

5

6

DRVL

RF

GND

V

IN

V

OUT

V

EN

V5IN

UDG-09064

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

1

FEATURES

APPLICATIONS

2

•

Wide Input Voltage Range: 3 V to 28 V

•

Notebook Computers

•

Output Voltage Range: 0.7 V to 2.6 V

•

I/O Supplies

•

Wide Output Load Range: 0 to 20A+

•

System Power Supplies

•

Built-in 0.5% 0.7 V Reference

DESCRIPTION

•

D-CAP

™ Mode with 100-ns Load Step

The TPS51218 is a small-sized single buck controller

Response

with adaptive on-time D-CAP

™ mode. The device is

•

Adaptive On Time Control Architecture With 4

suitable for low output voltage, high current, PC

Selectable Frequency Setting

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

power supply in digital consumer products. A small

•

4700 ppm/

package with minimal pin-count saves space on the

•

Internal 1-ms Voltage Servo Softstart

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

•

Pre-Charged Start-up Capability

selections minimize design effort required for new

•

Built in Output Discharge

designs. The skip-mode at light load condition, strong

•

Power Good Output

supports low-loss and high efficiency, over a broad

•

Integrated Boost Switch

load range. The conversion input voltage which is the

•

Built-in OVP/UVP/OCP

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.

•

Thermal Shutdown (Non-latch)

The device requires an external 5-V supply. The

•

SON-10 (DSC) Package

TPS51218 is available in a 10-pin SON package

specified from

–40°C to 85°C.

TYPICAL APPLICATION CIRCUIT

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

© 2009–2012, 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.