Datasheet > TPS51125A_17

TPS51125A_17

更新时间： 2024-02-15 21:43:54

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
37页	1165K
描述
Dual-Synchronous, Step-Down Controller with Out-of-Audio Operation and 100-mA LDOs for Notebook System Power

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TPS51125A_17 数据手册

TPS51125A

www.ti.com

SLUS976E –SEPTEMBER 2009–REVISED MARCH 2012

Dual-Synchronous, Step-Down Controller with Out-of-Audio™ Operation

and 100-mA LDOs for Notebook System Power

Check for Samples: TPS51125A

FEATURES

APPLICATIONS

•

Wide Input Voltage Range: 5.5 V to 28 V

Output Voltage Range: 2 V to 5.5 V

Built-in 100-mA 5-V/3.3-V LDO with Switches

Built-in 1% 2-V Reference Output

•

Notebook Computers

I/O Supplies

System Power Supplies

DESCRIPTION

With/Without Out-of-Audio™ Mode Selectable

Light Load and PWM only Operation

The TPS51125A is a 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 270-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’s

efficiency. The TPS51125A supports high efficiency,

fast transient response and provides a combined

power-good signal. Out-of-Audio™ mode light-load

operation enables low acoustic noise at much higher

efficiency than conventional forced PWM operation.

Adaptive on-time D-CAP™ control provides

convenient and efficient operation. The part operates

with supply input voltages ranging from 5.5 V to 28 V

and supports output voltages from 2 V to 5.5 V. The

TPS51125A is available in a 24-pin QFN package

and is specified from -40°C to 85°C ambient

temperature range.

•

Internal 1.6-ms Voltage Servo Softstart

Adaptive On-Time Control Architecture with

Four Selectable Frequency Setting

•

4500 ppm/°C R_DS(on)Current Sensing

Built-In Output Discharge

Power Good Output

Built-in OVP/UVP/OCP

Thermal Shutdown (Non-latch)

QFN24 (RGE)

Table 1. Differences between the TPS51125 and TPS51125A

TPS51125

TPS51125A

VREG5: at least 33 µF

VREG5: 10 µF or larger (X5R or X7R)

VREG3: at most 10 µF

(1 µF acceptable at no load)

VREG3: 10 µF or larger (X5R or X7R)

(1 µF acceptable at no load)

LDO Output Capacitance Requirement

VREF: 0.22 µF to 1 µF

VREF: 0.22 µF to 1 µF (X5R or X7R)

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.

Out-of-Audio, D-CAP 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...37

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与TPS51125A_17相关器件

型号	品牌	获取价格	描述	数据表
TPS51125ARGER	TI	获取价格	Dual-Synchronous, Step-Down Controller with O
TPS51125ARGET	TI	获取价格	Dual-Synchronous, Step-Down Controller with O
TPS51125RGER	TI	获取价格	Dual-Synchronous, Step-Down Controller with O
TPS51125RGERG4	TI	获取价格	Dual-Synchronous, Step-Down Controller with Out-of-AudioT Operation and 100-mA LDOs 24-VQF
TPS51125RGET	TI	获取价格	Dual-Synchronous, Step-Down Controller with O
TPS51125RGETG4	TI	获取价格	具有 100mA LDO 和 Out-of-Audio™ 的 4.5V 至 28V 双通道
TPS51163	TI	获取价格	SYNCHRONOUS BUCK CONTROLLER WITH HIGH-CURRENT GATE DRIVER
TPS51163DRCR	TI	获取价格	SYNCHRONOUS BUCK CONTROLLER WITH HIGH-CURRENT GATE DRIVER
TPS51163DRCT	TI	获取价格	SYNCHRONOUS BUCK CONTROLLER WITH HIGH-CURRENT GATE DRIVER
TPS5120	TI	获取价格	DUAL OUTPUT, TWO PHASE SYNCHRONOUS BUCK DC/DC CONTROLLER

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