Datasheet > LM3489QMMX/NOPB

LM3489QMMX/NOPB

更新时间： 2024-11-24 11:14:19

品牌	Logo	应用领域
德州仪器 - TI		控制器
页数	文件大小	规格书
27页	843K
描述
具有使能引脚的汽车级 4.5V 至 35V、滞环非同步 PFET 降压控制器 \| DGK \| 8 \| -40 to 125

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LM3489, LM3489-Q1

SNVS443C –MAY 2006–REVISED DECEMBER 2016

LM3489x Hysteretic PFET Buck Controller With Enable Pin

1 Features

3 Description

The LM3489 device is

switching regulator controller that can be used to

quickly and easily develop a small, cost-effective,

switching buck regulator for

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. A dedicated enable pin provides a

shutdown mode drawing only 7 µA. Leaving the

enable pin unconnected defaults to on.

a high-efficiency PFET

•

Qualified for Automotive Parts

AEC-Q100 Qualified With the Following Results:

–

Device Temperature Grade 1: –40°C to 125°C

Ambient Operating Temperature Range

a wide range of

–

Device HBM ESD Classification Level 2

Device CDM ESD Classification Level C5

•

Easy-to-Use Control Methodology

No Control Loop Compensation Required

Wide 4.5-V to 35-V Input Range

1.239 V to V_INAdjustable Output Range

High Efficiency: 93%

±1.3% (±2% Over Temperature) Internal

Reference

Current limit protection can be implemented by

measuring the voltage across the PFET’s R_DS(ON)

thus eliminating the need for a sense resistor. A

sense resistor may be used to improve current limit

accuracy if desired. The cycle-by-cycle current limit

can be adjusted with a single resistor, ensuring safe

operation over a range of output currents.

•

100% Duty Cycle Operation

Maximum Operation Frequency > 1 MHz

Current Limit Protection

Dedicated Enable Pin (on if Unconnected)

Shutdown Mode Draws Only 7-µA Supply Current

8-Pin VSSOP Package

Device Information⁽¹⁾

PART NUMBER

PACKAGE

BODY SIZE (NOM)

LM3489

LM3489-Q1

VSSOP (8)

3.00 mm × 3.00 mm

2 Applications

•

Set-Top Boxes

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

the end of the data sheet.

DSL or Cable Modems

PC/IA

Auto PCs

TFT Monitors

Battery-Powered Portable Applications

Distributed Power Systems

Always-On Power

High-Power LED Drivers

Automotive

Typical Application Circuit

ADJ

OUT

PGATE

ISENSE

IN1

OUT

ADJ

VIN

LM3489

GND

PGND

IN2

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...27

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与LM3489QMMX/NOPB相关器件

型号	品牌	获取价格	描述	数据表
LM348D	TI	获取价格	QUADRUPLE OPERATIONAL AMPLIFIERS
LM348D	STMICROELECTRONICS	获取价格	FOUR UA741 QUAD BIPOLAR OPERATIONAL AMPLIFIERS
LM348D3	TI	获取价格	IC,OP-AMP,QUAD,BIPOLAR,SOP,14PIN,PLASTIC
LM348DE4	TI	获取价格	QUADRUPLE OPERATIONAL AMPLIFIERS
LM348DG4	TI	获取价格	QUADRUPLE OPERATIONAL AMPLIFIERS
LM348DP1	TI	获取价格	IC,OP-AMP,QUAD,BIPOLAR,SOP,14PIN,PLASTIC
LM348DP3	TI	获取价格	IC,OP-AMP,QUAD,BIPOLAR,SOP,14PIN,PLASTIC
LM348DR	TI	获取价格	QUADRUPLE OPERATIONAL AMPLIFIERS
LM348DRE4	TI	获取价格	QUADRUPLE OPERATIONAL AMPLIFIERS
LM348DRG4	TI	获取价格	QUADRUPLE OPERATIONAL AMPLIFIERS

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