Datasheet > LT1946/LT1946A

LT1946/LT1946A

更新时间： 2024-10-02 22:15:27

品牌	Logo	应用领域
凌特 - Linear		转换器
页数	文件大小	规格书
12页	214K
描述
4A, 2MHz Dual Phase Step-Up DC/DC Converter in 3mm 3mm DFN

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中文翻译

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数据手册

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LT1946/LT1946A 数据手册

LTC3428

4A, 2MHz Dual Phase

Step-Up DC/DC Converter

in 3mm × 3mm DFN

FEATURES

DESCRIPTIO

The LTC^®3428 is a 2-phase, current mode boost con-

verter, capable of supplying 2A at 5V from a 3.3V input.

Two 93mΩ, 2A N-channel MOSFET switches allow the

LTC3428 to deliver high efficiency from input voltages as

low as 1.6V.

■

High Efficiency: Up to 92%

■

2-Phase Control Reduces Output Voltage Ripple

■

5V at 2A from 3.3V Input

3.3V at 1.5A from 1.8V Input

■

1.6V to 5.25V Adjustable Output Voltage

■

1.6V to 4.5V Input Range

External parts count and size are minimized by a 1MHz

switching frequency and a 2-phase design. Two phase

operation significantly reduces peak inductor currents

andcapacitorripplecurrent,doubling theeffectiveswitch-

ing frequency and minimizing inductor and capacitor size.

Externalcompensationallowsthefeedbackloopresponse

to be optimized for a particular application.

■

Internal Soft-Start Operation

■

Low Shutdown Current: <1µA

■

Uses Small Surface Mount Components

■

^{10-Pin 3mm × 3}U^{mm DFN Package}

APPLICATIO S

■

Networking Equipment

Other features include: an active low shutdown pin re-

duces supply current to below 1µA, internal soft-start,

antiringing control and thermal shutdown. The LTC3428

is available in a low profile (0.75mm) 10-lead (3mm ×

3mm) DFN package.

■

Handheld Instruments

■

Digital Cameras

Distributed Power

■

Local 3.3V to 5V Conversion

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

TYPICAL APPLICATIO

Efficiency vs Load Current

3.3V to 5V at 2A Converter

3.3V

2.2µH*

4.7µF***

OUT

5V/2A

OUT

OFF ON

22pF

SHDN

SWA

SWB

383k

LTC3428

10k

AGND

PGNDA

PGNDB

1000pF

121k

= 3.3V

= 5V

22µF****

OUT

L = 2.2µH

3428 TA01

* TOKO FDV06302R2

** PHILIPS PMEG1020

*** TAIYO YUDEN X5R JMK212BJ475MD

**** TAIYO YUDEN X5R JMK316BJ226ML

0.1

LOAD CURRENT (A)

3428 TA02

3428f

12 3 4 5 6 7...12

中文翻译

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与LT1946/LT1946A相关器件

型号	品牌	获取价格	描述	数据表
LT1946A	Linear	获取价格	2.7MHz Boost DC/DC Converter with 1.5A Switch and Soft-Start
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LT1946AEMS8E#TR	Linear	获取价格	暂无描述
LT1946AEMS8E#TRPBF	Linear	获取价格	LT1946A - 2.7MHz Boost DC/DC Converter with 1.5A Switch and Soft-Start; Package: MSOP; Pin
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