Datasheet > IRF7821

IRF7821

更新时间： 2024-01-01 19:36:51

品牌	Logo	应用领域
德州仪器 - TI		晶体晶体管开关脉冲光电二极管控制器
页数	文件大小	规格书
33页	910K
描述
Dual-Synchronous, Step-Down Controller with Out-of-Audio? Operation and 100-mA LDOs for Notebook System Power

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IRF7821 数据手册

TPS51123

www.ti.com ........................................................................................................................................................................................... SLUS890–DECEMBER 2008

Dual-Synchronous, Step-Down Controller with Out-of-Audio™ Operation and 100-mA

LDOs for Notebook System Power

FEATURES

APPLICATIONS

•

Notebook Computers

I/O Supplies

System Power Supplies

•

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

•

DESCRIPTION

With/Without Out-of-Audio™ Mode Selectable

Light-Load and PWM only Operation

The TPS51123 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 TPS51123

supports high efficiency, fast transient responses and

•

Internal 1.6-ms Voltage Servo Softstart

Adaptive On-Time Control Architecture with

Four Selectable Frequency Setting

provides

combined

power-good

signal.

•

4500 ppm/°C R_DS(on)Current Sensing

Built-In Output Discharge

Power Good Output

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

TPS51123 is available in a 24-pin QFN package and

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

range.

Built-in OVP/UVP/OCP

Thermal Shutdown (Non-latch)

24-Pin QFN (RGE) Package

13 kW

20 kW

220 nF

30 kW

VIN

130 kW

VIN

10 mF x 2

5.5 V

28 V

10 mF x 2

VO2

VO1 24

100 kW

10 mF

VREG3

VBST2

PGOOD 23

VBST1 22

DRVH1 21

LL1 20

VREG5

0.1 mF

TPS51123RGE

(QFN-24)

3.3 mF

5.1 W

VO2

VO1

5 V

10 DRVH2

11 LL2

3.3 V

PowerPAD

330 mF

12 DRVL2

DRVL1 19

13 14 15 16 17 18

EN0

ENC

VREG5

33 mF

VIN

UDG-08167

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...33

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与IRF7821相关器件

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IRF7821GPBF	INFINEON	获取价格	Power Field-Effect Transistor, 13.6A I(D), 30V, 0.0091ohm, 1-Element, N-Channel, Silicon,
IRF7821PBF	INFINEON	获取价格	HEXFET㈢Power MOSFET
IRF7821PBF-1	INFINEON	获取价格	Small Signal Field-Effect Transistor
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IRF7821TR	UMW	获取价格	种类:N-Channel;漏源电压（Vdss）:30V;持续漏极电流（Id）（在25°C时
IRF7821TRPBF	INFINEON	获取价格	HEXFETPower MOSFET
IRF7821TRPBF-1	INFINEON	获取价格	Small Signal Field-Effect Transistor
IRF7821UPBF	INFINEON	获取价格	暂无描述
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