LM3485

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
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Hysteretic PFET Buck Controller

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LM3485 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.

12 3 4 5 6 7...23

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LM3485 替代型号

型号	品牌	替代类型	描述	数据表
LM3489	TI	功能相似	具有使能引脚的滞环 PFET 降压控制器
LM3477	TI	功能相似	用于开关稳压器的高效高侧 N 沟道控制器
LM25085-Q1	TI	功能相似	LM25085, LM25085-Q1 42V Constant On-Time PFET Buck Switching Controller

与LM3485相关器件

型号	品牌	获取价格	描述	数据表
LM3485_14	TI	获取价格	Hysteretic PFET Buck Controller
LM3485EVAL	TI	获取价格	LM3485 Hysteretic PFET Buck Controller
LM3485MDC	NSC	获取价格	IC,SMPS CONTROLLER,VOLTAGE-MODE,DIE
LM3485MM	NSC	获取价格	Hysteretic PFET Buck Controller
LM3485MM	TI	获取价格	Hysteretic PFET Buck Controller
LM3485MM/NOPB	NSC	获取价格	IC SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO8, PLASTIC, MSOP-8, Switching Re
LM3485MM/NOPB	TI	获取价格	4.5 至 35V 滞环非同步 PFET 降压控制器 \| DGK \| 8 \| -40 to
LM3485MM-NOPB	TI	获取价格	Hysteretic PFET Buck Controller
LM3485MMX	NSC	获取价格	Hysteretic PFET Buck Controller
LM3485MMX	TI	获取价格	Hysteretic PFET Buck Controller

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