Datasheet > LTC3405

LTC3405

更新时间： 2022-12-13 11:23:39

品牌	Logo	应用领域
凌特 - Linear		转换器电池
页数	文件大小	规格书
24页	516K
描述
Dual DC/DC Converter with USB Power Manager and Li-Ion Battery Charger

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中文翻译

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LTC3405 数据手册

LTC3455

Dual DC/DC Converter

with USB Power Manager

and Li-Ion Battery Charger

DESCRIPTIO

FEATURES

The LTC^®3455 is a complete power management solution

for a variety of portable applications. The device contains

two synchronous step-down DC/DC converters, a USB

power controller, a full-featured Li-Ion battery charger, a

Hot Swap output, a low-battery indicator, and numerous

internal protection features. The LTC3455 provides a

small, simple solution for obtaining power from three

differentpowersources:asingle-cellLi-Ionbattery, aUSB

port, and a wall adapter. Current drawn from the USB bus

isaccuratelylimitedunderallconditions. WheneveraUSB

or a wall adapter is present, the battery charger is enabled

and all internal power for the device is drawn from the

appropriate external power source. All outputs are dis-

charged to ground during shutdown to provide complete

output disconnect. The device is available in a

4mm × 4mm 24-pin exposed-pad QFN package.

■

Seamless Transition between Input Power Sources:

Li-Ion Battery, USB, and 5V Wall Adapter

■

Accurate USB Current Limiting (500mA/100mA)

■

Two High Efficiency DC/DC Converters: Up to 96%

■

Thermal Regulation Maximizes Battery Charge

Rate without Risk of Overheating*

Full-Featured Li-Ion Battery Charger

■

Hot Swap™ Output for SDIO and Memory Cards

Pin-Selectable Burst Mode^®Operation

■

Output Disconnect: All Outputs Discharged to

Ground During Shutdown

■

Available in a 4mm × 4mm × 0.8mm 24-Pin

QFN Package

APPLICATIO S

■

Handheld Computers

Digital Cameras

MP3 Players

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

■

Hot Swap is a trademark of Linear Technology Corporation.

Burst Mode is a registered trademark of Linear Technology Corporation.

*U.S. Patent 6,522,118

■

TYPICAL APPLICATIO

USB 5V

1Ω

USB

MODE

HSON

ON2

SUSPEND

USB

Efficiency

4.7µF

CONTROLLER

µC

USBHP

PWRON

RST

100

SWITCHER 2

OUT2

WALL 5V

MAX

= 3.3V

PBSTAT

10µF

1Ω

1µF

ON/OFF

LTC3455

3.32k

1.8V

SWITCHER 1

V = 1.8V

OUT1

CHRG

WALLFB

0.1µF

3.3V, HS

HSO

1.24k

1µF

TIMER

PROG

HSI

2.49k

4.7µH

3.3V

0.5A

SW2

BAT

10pF

249k

4.7µF

SINGLE

CELL Li-ION

3.3V TO 4.2V

1.8V

10µF

FB2

= 3.6V

BAT

80.6k

LBO

100

1000

4.7µH

10pF

BAT

1.8V

0.4A

SW1

LOAD CURRENT (mA)

2.49M

100k

3455 TA01b

10µF

FB1

806k

80.6k

GND

3455 TA01a

3455f

12 3 4 5 6 7...24

中文翻译

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与LTC3405相关器件

型号	品牌	获取价格	描述	数据表
LTC3405A	Linear Systems	获取价格	Standalone 250mA Li-Ion Battery Charger in 2
LTC3405A	Linear	获取价格	Dual DC/DC Converter with USB Power Manager and Li-Ion Battery Charger
LTC3405A	ADI	获取价格	采用 ThinSOT 封装的 1.5MHz、300mA 同步降压型稳压器
LTC3405A-1.375	Linear	获取价格	1.375V, 1.5MHz, 300mA Synchronous Step-Down Regulators in ThinSOT
LTC3405A-1.375	ADI	获取价格	采用 ThinSOT 封装的 1.375V、1.5MHz、300mA 同步降压型稳压器
LTC3405A-1.5	Linear	获取价格	1.5V, 1.8V, 1.5MHz, 300mA Synchronous Step-Down Regulators in ThinSOT
LTC3405A-1.5	ADI	获取价格	采用 ThinSOT 封装的 1.5V、1.5MHz、300mA 同步降压型稳压器
LTC3405A-1.5_15	Linear	获取价格	1.5V, 1.8V, 1.5MHz, 300mA Synchronous Step-Down Regulators in ThinSOT
LTC3405A-1.8	Linear	获取价格	1.5V, 1.8V, 1.5MHz, 300mA Synchronous Step-Down Regulators in ThinSOT
LTC3405A-1.8	ADI	获取价格	采用 ThinSOT 封装的 1.8V、1.5MHz、300mA 同步降压型稳压器

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