Datasheet > TPS51427_1

TPS51427_1

更新时间： 2024-09-13 07:04:47

品牌	Logo	应用领域
德州仪器 - TI		控制器异步传输模式 ATM
页数	文件大小	规格书
41页	2142K
描述
DUAL D-CATM SYNCHRONOUS STEP-DOWN CONTROLLER FOR NOTEBOOK POWER RAILS

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TPS51427_1 数据手册

TPS51427

www.ti.com ................................................................................................................................................ SLUS819B–APRIL 2008–REVISED SEPTEMBER 2008

DUAL D-CAP™ SYNCHRONOUS STEP-DOWN CONTROLLER

FOR NOTEBOOK POWER RAILS

FEATURES

DESCRIPTION

•

Fixed-Frequency Emulated On-Time Control;

Frequency Selectable from Three Options

The TPS51427 is a dual synchronous step-down

controller designed for notebook and mobile

communications applications. This device is part of a

low-cost suite of notebook power bus regulators that

enables system designs with low external component

•

D-CAP™ Mode Enables Fast Transient

Response Less than 100 ns

•

Advanced Ramp Compensation Allows Low

Output Ripple with Minimal Jitter

counts.

The

TPS51427

includes

two

•

Selectable PWM-Only/OOA™/Auto-Skip Modes

Wide Input Voltage Range: 5.5 V to 28 V

Dual Fixed or Adjustable SMPS:

pulse-width-modulation (PWM) controllers, SMPS1

and SMPS2. The output of SMPS1 can be adjusted

from 0.7 V to 5.9 V, while the output of SMPS2 can

be adjusted from 0.5 V to 2.5 V. This device also

features a low-dropout (LDO) regulator that provides

a 5-V/3.3-V output, or adjustable from 0.7-V to 4.5-V

output via LDOREFIN. The fixed-frequency emulated

adaptive on-time control supports seamless operation

between PWM mode under heavy load conditions

and reduced frequency operation at light loads for

high-efficiency down to the milliampere range. An

integrated boost switch enhances the high-side

MOSFET to further improve efficiency. The main

control loop is the D-CAP™ mode that is optimized

for low equivalent series resistance (ESR) output

capacitors such as POSCAP or SP-CAP. Advanced

ramp compensation minimizes jitter without degrading

line and load regulation. R_DS(on)current sensing

methods offers maximum cost saving.

–

0.7 V to 5.9 V (Channel1)

0.5 V to 2.5 V (Channel2)

•

Fixed 3.3-V/5-V, or Adjustable Output 0.7-V to

4.5-V LDO; Capable of Sourcing 100 mA

Fixed 3.3-VREF Output Capable of Sourcing

10 mA

Temperature Compensated Low-Side R_DS(on)

Current Sensing

Adaptive Gate Drivers with Integrated Boost

Switch

•

Bootstrap Charge Auto Refresh

Integrated Soft Start, Tracking Soft Stop

Independent PGOOD and EN for Each Channel

The TPS51427 supports supply input voltages that

range from 5.5 V to 28 V. It is available in the 32-pin,

APPLICATIONS

5-mm

5-mm QFN package (Green, RoHs-

•

Notebook I/O and System Bus Rails

Graphics Application

PDAs and Mobile Communication Devices

compliant, and Pb-free). The device is specified from

–40°C to +85°C.

TPS51427

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, OOA are trademarks of Texas Instruments.

All other trademarks are the property of their respective owners.

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...41

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与TPS51427_1相关器件

型号	品牌	获取价格	描述	数据表
TPS51427_12	TI	获取价格	DUAL D-CAPâ¢ SYNCHRONOUS STEP-DOWN CONTROLLE
TPS51427A	TI	获取价格	DUAL D-CAPâ¢ SYNCHRONOUS STEP-DOWN CONTROLLE
TPS51427ARHBR	TI	获取价格	DUAL D-CAPâ¢ SYNCHRONOUS STEP-DOWN CONTROLLE
TPS51427ARHBRG4	TI	获取价格	DUAL D-CAPâ¢ SYNCHRONOUS STEP-DOWN CONTROLLE
TPS51427ARHBT	TI	获取价格	DUAL D-CAPâ¢ SYNCHRONOUS STEP-DOWN CONTROLLE
TPS51427ARHBTG4	TI	获取价格	DUAL D-CAPâ¢ SYNCHRONOUS STEP-DOWN CONTROLLE
TPS51427RHBR	TI	获取价格	DUAL D-CAP⑩ SYNCHRONOUS STEP-DOWN CONTROLLER
TPS51427RHBRG4	TI	获取价格	Dual D-CAP?Mode Synchronous Step Down Controller for Notebook Power Rails 32-VQFN -40 to 8
TPS51427RHBT	TI	获取价格	DUAL D-CAP⑩ SYNCHRONOUS STEP-DOWN CONTROLLER
TPS5142RHBR	TI	获取价格	SWITCHING CONTROLLER, PQCC32, 5 X 5 MM, GREEN, PLASTIC, QFN-32

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