Datasheet > TPS51225_17

TPS51225_17

更新时间： 2024-11-24 02:58:27

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
31页	1291K
描述
Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs

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TPS51225_17 数据手册

TPS51225, TPS51225B, TPS51225C

www.ti.com

SLUSAV0A –JANUARY 2012–REVISED JUNE 2012

Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs

Check for Samples: TPS51225, TPS51225B, TPS51225C

FEATURES

APPLICATIONS

•

Input Voltage Range: 5.5 V to 24 V

•

Notebook Computers

Output Voltages: 5 V and 3.3 V (Adjustable

Range ±10%)

Netbook, Tablet Computers

DESCRIPTION

The TPS51225/B/C is

•

Built-in, 100-mA, 5-V and 3.3-V LDOs

Clock Output for Charge-Pump

±1% Reference Accuracy

cost-effective, dual-

synchronous buck controller targeted for notebook

system-power supply solutions. It provides 5-V and

3.3-V LDOs and requires few external components.

The 260-kHz VCLK output can be used to drive an

external charge pump, generating gate drive voltage

for the load switches without reducing the main

converter efficiency. The TPS51225/B/C supports

high efficiency, fast transient response and provides a

combined power-good signal. Adaptive on-time, D-

CAP™ control provides convenient and efficient

operation. The device operates with supply input

voltage ranging from 5.5 V to 24 V and supports

Adaptive On-time D-CAP™ Mode Control

Architecture with 300kHz/355kHz Frequency

Setting

•

Auto-skip Light Load Operation (TPS51225/C)

OOA Light Load Operation (TPS51225B)

Internal 0.8-ms Voltage Servo Soft-Start

Low-Side R_DS(on)Current Sensing Scheme with

4500 ppm/°C Temperature Coefficient

•

Built-in Output Discharge Function

output voltages of 5.0

and 3.3 V. The

TPS51225/B/C is available in a 20-pin, 3 mm × 3

mm, QFN package and is specified from –40°C to

85°C.

Separate Enable Input for Switchers

(TPS51225/B/C)

•

Dedicated OC Setting Terminals

Power Good Indicator

OVP/UVP/OCP Protection

Non-latch UVLO/OTP Protection

20-Pin, 3 mm × 3 mm, QFN (RUK)

ORDERING INFORMATION⁽¹⁾

ORDERABLE

DEVICE NUMBER

ENABLE

FUNCTION

OUTPUT

SKIP MODE

ALWAYS ON-LDO

PACKAGE

QUANTITY

SUPPLY

Tape and Reel

Mini reel

TPS51225RUKR

TPS51225RUKT

TPS51225BRUKR

TPS51225BRUKT

TPS51225CRUKR

TPS51225CRUKT

3000

250

EN1/ EN2

Auto-skip

VREG3

PLASTIC Quad

Flat Pack

(20 pin QFN)

Tape and Reel

Mini reel

3000

250

OOA

VREG3

Tape and Reel

Mini reel

3000

250

Auto-skip

VREG3 & VREG5

(1) For the most current package and ordering information see the Package Option Addendum at the end of this document, or see the TI

website at www.ti.com.

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, Out-of-Audio 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...31

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与TPS51225_17相关器件

型号	品牌	获取价格	描述	数据表
TPS51225B	TI	获取价格	Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs
TPS51225BRUKR	TI	获取价格	Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs
TPS51225BRUKT	TI	获取价格	Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs
TPS51225C	TI	获取价格	Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs
TPS51225CRUKR	TI	获取价格	Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs
TPS51225CRUKT	TI	获取价格	Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs
TPS51225RUKR	TI	获取价格	Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs
TPS51225RUKT	TI	获取价格	Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs
TPS5124	TI	获取价格	DUAL CHANNEL SYNCHRONOUS STEP DOWN PWM CONTROLLER
TPS5124DBT	TI	获取价格	DUAL CHANNEL SYNCHRONOUS STEP DOWN PWM CONTROLLER

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