TPS51020 Datasheet

IC型號：
TPS51020
PDF描述：
雙路 DDR 可選同步降壓控制器
文件大小：
568.00KB
PDF頁數(shù)：
27頁
芯片廠家：
TI

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TPS51020

SLUS564B 鈭?JULY 2003 鈭?REVISED DECEMBER 2003

DUAL, VOLTAGE MODE, DDR SELECTABLE, SYNCHRONOUS,

STEP DOWN CONTROLLER FOR NOTEBOOK SYSTEM POWER

FEATURES

Wide Input Voltage Range: 4.5-V to 28-V

Selectable Dual and DDR Modes

Selectable Fixed Frequency Voltage Mode

Integrated Selectable Output Discharge

Advanced Power Good Logic Monitors both

Channels

Selectable Autoskip Mode

Integrated Boot Strap Diodes

180擄 Phase Shift Between Channels

Integrated 5-V, 60-mA Regulator

Input Feedforward Control

1% Internal 0.85-V Reference

DS(on)

Overcurrent Detection (4200 ppm/擄C)

Integrated OVP, UVP and Power Good Timers

30-pin TSSOP Package

DESCRIPTION

The TPS51020 is a multi-function dual-

synchronous step-down controller for notebook

system power. The part is specifically designed

for high performance, high efficiency applications

where the loss associated with a current sense

resistor is unacceptable. The TPS51020 utilizes

feed forward voltage mode control to attain high

efficiency without sacrificing line response.

Efficiency at light load conditions can be

maintained high as well by incorporating autoskip

operation. A selectable, Suspend to RAM (STR)

supported, DDR option provides a one chip

solution for all switching applications from

5-V/3.3-V supply to a complete DDR termination

solution.

ORDERING INFORMATION

鈭?0擄C to 85擄C

PLASTIC TSSOP (DBT)

TPS51020DBT

TPS51020DBTR (T&R)

APPLICATIONS

Notebook Computers System Bus and I/O

DDR I or DDR II Termination

SIMPLIFIED

VO1

APPLICATION

DIAGRAM

VIN

VO1

INV1

TPS51020

2 COMP1

3 SSTRT1

4 SKIP

VO1_VDDQ

6 DDR

7 GND

8 REF_X

9 ENBL1

10 ENBL2

VO2

VREG5

11 VO2

12 PGOOD

13 SSTRT2

14 COMP2

VO2

15 INV2

VBST1 30

OUT1_U

LL1

OUT1_D

OUTGND1

TRIP1 25

VIN

TRIP2

VREG5

REG5_IN

OUTGND2

OUT2_D

LL2

OUT2_U

VBST2

VIN

VO1

VIN

VREG5

EXT_5V

VO2

UDG鈭?3144

VIN

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.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

錚?/div>

2003, Texas Instruments Incorporated

www.ti.com

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