Datasheet > LT3489

LT3489

更新时间： 2023-12-20 18:46:19

品牌	Logo	应用领域
亚德诺 - ADI		开关软启动转换器
页数	文件大小	规格书
12页	219K
描述
具 2.5A 开关和软启动功能的 2MHz 升压型 DC/DC 转换器

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中文翻译

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LT3489 数据手册

LT3489

2MHz Boost DC/DC

Converter with 2.5A Switch

and Soft-Start

DESCRIPTIO

FEATURES

TheLT^®3489isaﬁxedfrequencystep-upDC/DCconverter

containing an internal 2.5A, 40V switch. The LT3489 is

ideal for large TFT-LCD panel power supplies. The LT3489

switches at 2MHz, allowing the use of tiny, low proﬁle

inductors and low value ceramic capacitors. Loop com-

pensation can be either internal or external, giving the

user ﬂexibility in setting loop compensation and allow-

ing optimized transient response with low ESR ceramic

output capacitors. Soft-start is controlled with an external

capacitor, which determines the input current ramp rate

during start-up.

■

2.5A, 0.12Ω, 40V Internal Switch

■

2MHz Switching Frequency

■

Integrated Soft-Start Function

■

V Range: 2.6V to 16V

■

Adjustable Output from V to 40V

Low V

Switch: 110mV at 1A (Typical)

CESAT

8V at 610mA from a 3.3V Input

Internal or External Loop Compensation

Small 8-Lead MS8E

APPLICATIO S

The8-leadMS8Epackageandhighswitchingfrequencyen-

sure a low proﬁle overall solution less than 1.1mm high.

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

■

TFT-LCD Bias Supplies

■

GPS Receivers

■

DSL Modems

Local Power Supply

■

TYPICAL APPLICATIO

Low Proﬁle, Triple Output TFT Supply (8V, –8V, 23V)

Efﬁciency

23V

10mA

0.1µF

2.2µH

3.3V

610mA

28.7k

OFF ON

SHDN

LOAD = 10mA

LOAD = 20mA

OFF

SS LT3489

COMP

GND

4.7µF

20µF

2µF

100 200

400

300

LOAD CURRENT (mA)

500 600 700

VDD

5.23k

100nF

3489 TA01b

37.4k

220pF

0.1µF

2µF

OFF

–8V

3489 TA01

20mA

3489f

12 3 4 5 6 7...12

中文翻译

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