TPS51511

更新时间： 2024-11-02 04:27:31

品牌	Logo	应用领域
德州仪器 - TI		控制器
页数	文件大小	规格书
29页	1018K
描述
Synchronous Switcher Controller With 2-A LDO for GPU Power

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TPS51511 数据手册

TPS51511

www.ti.com

SLVS735A–FEBRUARY 2007–REVISED APRIL 2007

Synchronous Switcher Controller With 2-A LDO for GPU Power

FEATURES

–

Optional PGOOD

•

Switcher Controller:

Output Discharge

Thermal Shutdown

–

Adjustable-Output Buck Converter, 0.75 V

to 3.3 V

APPLICATIONS

–

Wide Input Voltage Range: 3.0-V to 28-V

•

GPU Power

D-CAP™ Mode with 100-ns Load Step

Response

•

Notebook Computers

–

Current Mode Option Supports Ceramic

Output Capacitors

DESCRIPTION

The TPS51511 is

350-kHz D-CAP-mode

–

Current Sensing From R_DS(ON)or Resistor

synchronous switcher with a 2-A, source-only low

drop-out (LDO) regulator. It is specifically designed

for low cost/low noise/low external-component count

power systems for GPU applications. The integrated

'OD' switch in the buck controller supports dynamic

output voltage change. The current mode option of

the synchronous buck converter can support pure

Internal Switch Supports Dynamic Output

Voltage Change

–

Advanced PGOOD Mask Feature

Equipped With PGOOD, OVP and UVP

Output Discharge

5 V UVLO Protection

output

ceramic-capacitor

applications.

The

open-drain LDO power-good signal can be accessed

through the OD pin when it is needed in the

application. The TPS51511 is available in the

thermally-enhanced 20-pin QFN package, and is

specified from –40°C to 85°C.

•

LDO Regulator:

–

2-A LDO for GPU I/O Power

Input Range: Up to 5 V

Output Range: 0.75 V to 3.3 V

Requires Only 20-µF Ceramic Output

Capacitor for LDO Output

+1.8 V_LDOIN

= 3 V to 28 V

GPU_core

+1.1 V_Lower Power

+1.2 V_Performance

PCI Express I/O

+1.2 V/ 2 A

DRVH 19

VLDO

VLDOFB

GND

DRVL

PGND 16

CS 15

TPS51511

ODOFF

V5IN 14

ODOFF = Lo, 1.2 V

ODOFF = Hi, 1.1 V

PGOOD

ENSW

COMP

VOSW

+5 V

PGOOD

ENSW

ENLDO

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.

D-CAP, PowerPAD are trademarks of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...29

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与TPS51511相关器件

型号	品牌	获取价格	描述	数据表
TPS51511RHLR	TI	获取价格	Synchronous Switcher Controller With 2-A LDO for GPU Power
TPS51511RHLRG4	TI	获取价格	SWITCHING CONTROLLER, 350kHz SWITCHING FREQ-MAX, PQCC20, GREEN, PLASTIC, QFN-20
TPS51511RHLT	TI	获取价格	Synchronous Switcher Controller With 2-A LDO for GPU Power
TPS51513	TI	获取价格	SINGLE PHASE D-CAP+ SYNCHRONOUS BUCK CONTROLLER WITH INTEGRATED DRIVERS FOR GENERAL IC VCO
TPS51513_16	TI	获取价格	SINGLE PHASE, D-CAP SYNCHRONOUS BUCK CONTROLLER
TPS51513RHB	TI	获取价格	SINGLE PHASE D-CAP+ SYNCHRONOUS BUCK CONTROLLER WITH INTEGRATED DRIVERS FOR GENERAL IC VCO
TPS51513RHBR	TI	获取价格	3V to 28V Input Sync. Step Down Controller with D-CAP+™ Mode and Integrated Gate
TPS51513RHBT	TI	获取价格	暂无描述
TPS51518	TI	获取价格	Single-Phase, D-CAPâ¢ and D-CAP2â¢ Controll
TPS51518_17	TI	获取价格	Single-Phase, D-CAP and D-CAP2 Controller with 2-Bit Flexible VID Control

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