LTC3458LEDE#PBF

更新时间： 2024-11-19 13:09:51

品牌	Logo	应用领域
凌特 - Linear		转换器
页数	文件大小	规格书
16页	339K
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中文翻译

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数据手册
替代型号

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LTC3458LEDE#PBF 数据手册

LTC3458

1.4A, 1.5MHz Synchronous

Step-Up DC/DC Converter

with Output Disconnect

FEATURES

DESCRIPTIO

The LTC^®3458 is a high efficiency, current mode, fixed

frequency, step up DC/DC converter with true output

disconnect and inrush current limiting. The LTC3458 is

rated for a 7.5V output and includes a 0.3Ω N-channel

MOSFET switch and a 0.4Ω P-channel MOSFET synchro-

nous rectifier. The LTC3458 is well suited for battery

powered applications and includes programmable output

voltage, switching frequency and loop compensation. The

oscillator frequency can be set up to 1.5MHz or synchro-

nized to an external clock.

■

High Efficiency: Up to 93%

■

Inrush Current Limiting and Output Disconnect

■

Programmable Output Voltages up to 7.5V

■

1.5V to 6V Input Range

■

Programmable/Synchronizable Fixed Frequency

Operation up to 1.5MHz

Programmable Automatic Burst Mode^®Operation

■

Current Mode Control with Programmable Soft-Start

Period and Peak Current Limit

700mA at 7V from 5V Input

■

0.3Ω N-Channel and 0.4Ω P-Channel 1.4A Switches

Quiescent current is only 15µA during Burst Mode opera-

tion maximizing battery life in portable applications. The

BurstModecurrentthreshold,peakcurrentlimit,andsoft-

start are externally programmable. Other features include

<1µA shutdown current, antiringing control, and thermal

limit. The LTC3458 is available in a low profile (0.75mm),

3mm × 4mm 12-pin DFN package.

at 5V_OUT

■

Ultralow Quiescent Currents: 15µA Sleep, <1µA in

Shutdown

■

3mm × 4mm Thermally Enhanced DFN Package

APPLICATIO S

■

Point-of-Load Regulators

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

Burst Mode is a registered trademark of Linear Technology Corporation.

■

USB V_BUSPower

■

LCD Bias

OLED Displays

■

TYPICAL APPLICATIO

USB to 7V at 1MHz

COEV

10µH

DQ7545

USB to 7V_OUT

1000

100

USB

4.35V to 5.25V

5.25V

LTC3458

2.2µF

OUT

GND/PGND

SHDN

OUT

4.35V

500mA

10pF

1.5M

316k

ON OFF

POWER LOSS

COMP

SYNC

0.01µF

33k

22µF

X5R

0.01µF

10pF

0.1

1000

BURST

0.1

100

LIM

LOAD CURRENT (mA)

560pF

200k 124k

133k

3458 TA01b

3458 TA01a

3458f

12 3 4 5 6 7...16

中文翻译

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LTC3458LEDE#PBF 替代型号

型号	品牌	替代类型	描述	数据表
LTC3458LEDE#TRPBF	Linear	类似代替	LTC3458L - 1.7A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect; Packag

与LTC3458LEDE#PBF相关器件

型号	品牌	获取价格	描述	数据表
LTC3458LEDE#TR	Linear	获取价格	LTC3458L - 1.7A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect; Packag
LTC3458LEDE#TRPBF	Linear	获取价格	LTC3458L - 1.7A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect; Packag
LTC3459	Linear	获取价格	10V Micropower Synchronous Boost Converter in ThinSOT
LTC3459	ADI	获取价格	10V 微功率同步升压型转换器
LTC3459_07	Linear	获取价格	10V Micropower Synchronous Boost Converter
LTC3459EDC#PBF	Linear	获取价格	暂无描述
LTC3459EDC#TRMPBF	Linear	获取价格	LTC3459 - 10V Micropower Synchronous Boost Converter in ThinSOT; Package: DFN; Pins: 6; Te
LTC3459EDC#TRPBF	Linear	获取价格	LTC3459 - 10V Micropower Synchronous Boost Converter in ThinSOT; Package: DFN; Pins: 6; Te
LTC3459EDCB#PBF	Linear	获取价格	LTC3459 - 10V Micropower Synchronous Boost Converter in ThinSOT; Package: DFN; Pins: 6; Te
LTC3459EDCB#TRPBF	Linear	获取价格	暂无描述

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