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LM3485MMX-NOPB

更新时间： 2024-11-23 12:04:39

品牌	Logo	应用领域
德州仪器 - TI		控制器
页数	文件大小	规格书
23页	1030K
描述
Hysteretic PFET Buck Controller

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LM3485MMX-NOPB 数据手册

LM3485

www.ti.com

SNVS178G –JANUARY 2002–REVISED FEBRUARY 2013

Hysteretic PFET Buck Controller

Check for Samples: LM3485

FEATURES

DESCRIPTION

The LM3485 is a high efficiency PFET switching

regulator controller that can be used to quickly and

easily develop a small, low cost, switching buck

regulator for a wide range of applications. The

hysteretic control architecture provides for simple

design without any control loop stability concerns

using a wide variety of external components. The

PFET architecture also allows for low component

count as well as ultra-low dropout, 100% duty cycle

operation. Another benefit is high efficiency operation

at light loads without an increase in output ripple.

•

Easy to Use Control Methodology

No Control Loop Compensation Required

4.5V to 35V Wide Input Range

1.242V to V_INAdjustable Output Range

High Efficiency 93%

±1.3% (±2% Over Temp) Internal Reference

100% Duty Cycle

Maximum Operating Frequency > 1MHz

Current Limit Protection

Current limit protection is provided by measuring the

voltage across the PFET’s R_DS(ON), thus eliminating

the need for a sense resistor. The cycle-by-cycle

current limit can be adjusted with a single resistor,

ensuring safe operation over a range of output

currents.

VSSOP-8

APPLICATIONS

•

Set-Top Box

DSL or Cable Modem

PC/IA

Auto PC

TFT Monitor

Battery Powered Portable Applications

Distributed Power Systems

Always On Power

Typical Application Circuit

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.

All 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.

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