LTC3458L

更新时间： 2024-11-18 22:39:55

品牌	Logo	应用领域
凌特 - Linear		转换器
页数	文件大小	规格书
16页	390K
描述
1.7A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect

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LTC3458L 数据手册

LTC3458L

1.7A, 1.5MHz Synchronous

Step-Up DC/DC Converter

with Output Disconnect

FEATURES

DESCRIPTIO

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

frequency, step up DC/DC converter with true output

disconnect and inrush current limiting. The LTC3458L is

rated for up to 6V output and includes a 0.2Ω N-channel

MOSFET switch and a 0.3Ω P-channel MOSFET synchro-

nous rectifier. The LTC3458L 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 95%

■

Inrush Current Limiting and Output Disconnect

■

Programmable Output Voltages up to 6V

■

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

■

0.2Ω N-Channel and 0.3Ω P-Channel Switches

■

Ultralow Quiescent Currents: 12µA Sleep, <1µA in

Quiescent current is only 12µA 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. TheLTC3458Lisavailableinalowprofile(0.75mm),

4mm × 3mm 12-pin DFN package.

Shutdown

■

12-Pin 4mm × 3mm Thermally Enhanced DFN

Package

APPLICATIO S

■

Point-of-Load Regulators

■

USB V_BUSPower

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

Burst Mode is a registered trademark of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

■

Portable GPS

MP3 Players

■

Protected by U.S. Patents including 5481178, 6304066, 6580258, 5511131, 6498466

TYPICAL APPLICATIO

Li-Ion to 5V at 1MHz

7.4µH

Li-Ion to 5V_OUT

100

1000

100

Li Ion

3.1V TO 4.2V

LTC3458L

2.2µF

4.2V

OUT

GND/PGND

SHDN

OUT

3.1V

750mA

10pF

3.6V

ON OFF

COMP

SYNC

POWER

LOSS

324k

0.01µF

33k

22µF

X5R

0.01µF

10pF

BURST

LIM

0.1

1000

560pF

200k 84.5k

133k

0.1

100

LOAD CURRENT (mA)

3458L TA01a

3458L TA01b

3458lf

12 3 4 5 6 7...16

中文翻译

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与LTC3458L相关器件

型号	品牌	获取价格	描述	数据表
LTC3458LEDE	Linear	获取价格	1.7A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect
LTC3458LEDE#PBF	Linear	获取价格	暂无描述
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

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