12

17

16

6

15

14

13

11

V5IN

TPS51216

S3

S5

VREF

VBST

DRVH

SW

DRVL

8

10

REFIN

PGND

7

19

GND

MODE

18 TRIP

20

9

2

3

PGOOD

VDDQSNS

VLDOIN

VTT

1

4

5

VTTSNS

VTTGND

VTTREF

UDG-10138

VDDQ

VTT

PGND

S3

S5

PGND

5VIN

PGND

VIN

VTTREF

AGND

AGND

Powergood

TPS51216

www.ti.com

SLUSAB9 – NOVEMBER 2010

Complete DDR2, DDR3 and DDR3L Memory Power Solution Synchronous Buck

Controller, 2-A LDO, Buffered Reference

Check for Samples: TPS51216

1

FEATURES

DESCRIPTION

2

•

Synchronous Buck Controller (VDDQ)

The TPS51216 provides a complete power supply for

DDR2, DDR3 and DDR3L memory systems in the

–

Conversion Voltage Range: 3 V to 28 V

lowest total cost and minimum space. It integrates a

–

Output Voltage Range: 0.7 V to 1.8 V

synchronous buck regulator controller (VDDQ) with a

–

2-A sink/source tracking LDO (VTT) and buffered low

–

D-CAP™ Mode for Fast Transient Response

noise reference (VTTREF). The TPS51216 employs

D-CAP™ mode coupled with 300 kHz/400 kHz

–

Selectable 300 kHz/400 kHz Switching

frequencies

for

ease-of-use

and

fast

transient

Frequencies

response.

The

VTTREF

tracks

VDDQ/2

within

–

Optimized Efficiency at Light and Heavy

excellent 0.8% accuracy. The VTT, which provides 2-

Loads with Auto-skip Function

A sink/source peak current capabilities, requires only

10-mF

of

ceramic

capacitance.

In

addition,

a

–

Supports Soft-Off in S4/S5 States

dedicated LDO supply input is available.

–

OCL/OVP/UVP/UVLO Protections

The TPS51216 provides rich useful functions as well

–

Powergood Output

as excellent power supply performance. It supports

•

2-A LDO(VTT), Buffered Reference(VTTREF)

flexible power state control, placing VTT at high-Z in

–

2-A (Peak) Sink and Source Current

S3 and discharging VDDQ, VTT and VTTREF (soft-

off) in S4/S5 state. Programmable OCL with low-side

–

Requires Only 10-m

mF of Ceramic Output

MOSFET

Capacitance

thermal shutdown protections are also available.

–

Buffered, Low Noise, 10-mA VTTREF

The TPS51216 is available in a 20-pin, 3 mm × 3

Output

mm, QFN package and is specified for ambient

–

0.8% VTTREF, 20-mV VTT Accuracy

temperature from –40°C to 85°C.

–

Support High-Z in S3 and Soft-Off in S4/S5

•

Thermal Shutdown

•

20-Pin, 3 mm × 3 mm, QFN Package

APPLICATIONS

•

DDR2/DDR3/DDR3L Memory Power Supplies

•

SSTL_18, SSTL_15, SSTL_135 and HSTL

Termination

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 © 2010, 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.