Datasheet > LM3485-Q1

LM3485-Q1

更新时间： 2024-11-27 11:11:47

品牌	Logo	应用领域
德州仪器 - TI		控制器
页数	文件大小	规格书
28页	736K
描述
汽车级 4.5V 至 35V、滞环非同步 PFET 降压控制器

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LM3485

SNVS178H –JANUARY 2002–REVISED DECEMBER 2015

LM3485 Hysteretic PFET Buck Controller

1 Features

3 Description

The LM3485 is a high-efficiency PFET switching

•

Easy-to-Use Control Methodology

No Control-Loop Compensation Required

4.5-V to 35-V Wide Input Range

1.242-V to V_INAdjustable Output Range

High Efficiency 93%

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 ultralow dropout, 100% duty cycle

operation. Another benefit is high efficiency operation

at light loads without an increase in output ripple.

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

100% Duty Cycle

Maximum Operating Frequency > 1 MHz

Current Limit Protection

Current limit protection is provided by measuring the

voltage across the R_DS(ON)of the PFET, 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.

2 Applications

•

Set-Top Box

DSL or Cable Modem

PC/IA

Auto PC

Device Information⁽¹⁾

TFT Monitor

PART NUMBER

LM3485

PACKAGE

BODY SIZE (NOM)

Battery-Powered Portable Applications

Distributed Power Systems

Always On Power

VSSOP (8)

3.0 mm × 3.0 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Typical Application Circuit

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

12 3 4 5 6 7...28

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LM3485-Q1 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
LM3475	TI	功能相似	10V、滞后 PFET 降压控制器
LM3485	TI	功能相似	Hysteretic PFET Buck Controller

与LM3485-Q1相关器件

型号	品牌	获取价格	描述	数据表
LM3485Q1MM	TI	获取价格	Hysteretic PFET Buck Controller
LM3485Q1MM	NSC	获取价格	IC SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO8, PLASTIC, MSOP-8, Switching Re
LM3485Q1MM/NOPB	TI	获取价格	汽车级 4.5V 至 35V、滞环非同步 PFET 降压控制器 \| DGK \| 8 \| -
LM3485Q1MM-NOPB	TI	获取价格	Hysteretic PFET Buck Controller
LM3485Q1MMX	NSC	获取价格	IC SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO8, PLASTIC, MSOP-8, Switching Re
LM3485Q1MMX	TI	获取价格	Hysteretic PFET Buck Controller
LM3485Q1MMX-NOPB	TI	获取价格	Hysteretic PFET Buck Controller
LM3487	NSC	获取价格	High Efficiency High-Side N-Channel Controller for Switching Regulator
LM3487MM	NSC	获取价格	High Efficiency High-Side N-Channel Controller for Switching Regulator
LM3487MMX	NSC	获取价格	High Efficiency High-Side N-Channel Controller for Switching Regulator

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