Datasheet > LTC3554EPDPBF

LTC3554EPDPBF

更新时间： 2022-12-22 03:14:04

品牌	Logo	应用领域
凌特 - Linear		稳压器电池
页数	文件大小	规格书
36页	429K
描述
Micropower USB Power Manager with Li-Ion Charger and Two Step-Down Regulators

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LTC3554EPDPBF 数据手册

LTC3554

Micropower USB Power

Manager with Li-Ion Charger

and Two Step-Down Regulators

DESCRIPTION

FEATURES

The LTC^®3554 is a micropower, highly integrated power

management and battery charger IC for single-cell

Li-Ion/Polymer battery applications. It includes a

PowerPath manager with automatic load prioritization,

a battery charger, an ideal diode and numerous internal

protectionfeatures.DesignedspeciﬁcallyforUSBapplica-

tions, the LTC3554 power manager automatically limits

input current to a maximum of either 100mA or 500mA.

Battery charge current is automatically reduced such that

the sum of the load current and the charge current does

not exceed the selected input current limit.

10μA Standby Mode Quiescent Current (All Outputs On)

Seamless Transition Between Input Power Sources:

Li-Ion/Polymer Battery and USB

240mΩ Internal Ideal Diode Provides Low Loss

PowerPath™

Dual High Efﬁciency Step-Down Switching Regulators

(200mA I ) with Adjustable Output Voltages

OUT

Pushbutton On/Off Control with System Reset

Full Featured Li-Ion/Polymer Battery Charger

Programmable Charge Current with Thermal Limiting

Instant-On Operation with Discharged Battery

Compact Ultrathin 3mm × 3mm × 0.55mm 20-Pin

UTQFN Package

The LTC3554 also includes two synchronous step-down

switching regulators as well as a pushbutton controller.

With all supplies enabled in standby mode, the quiescent

currentdrawnfromthebatteryisonly10μA. TheLTC3554

is available in a 3mm × 3mm × 0.55mm 20-pin UTQFN

package.

APPLICATIONS

USB-Based Handheld Products

Portable Li-Ion/Polymer Based Electronic Devices

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. PowerPath is a trademark of Linear Technology Corporation. All other

trademarks are the property of their respective owners. Protected by U.S. Patents, including

6522118, 6700364, 5481178, 6304066, 6570372, 6580258, 7511390.

Wearable Computers

Low Power Medical Devices

TYPICAL APPLICATION

Battery Drain Current

4.35V TO 5.5V

USB INPUT

SYSTEM

LOAD

BUS

vs Temperature

OUT

10ꢀF

100k

= 3.8V

STBY = 3.8V

REGULATORS LOAD = 0mA

BAT

NTC

CHRG

LTC3554

PROG

BAT

100k

Li-Ion

BATTERY

BOTH REGULATORS

ENABLED

1.87k

HPWR

SUSP

BVIN

2.2ꢀF

ONE REGULATOR ENABLED

4.7ꢀH

BOTH REGULATORS DISABLED

3.3V

PWR_ON1

SW1

FB1

200mA

2.05M

10pF

10ꢀF

FSEL

HARD RESET

649k

STBY

–75 –50 –25

25 50 75 100 125

PGOOD

PWR_ON2

PBSTAT

10ꢀH

10pF

TEMPERATURE (°C)

1.2V

200mA

SW2

3554 TA01b

332k

649k

FB2

3554 TA01a

ON/OFF

3554f

12 3 4 5 6 7...36

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与LTC3554EPDPBF相关器件

型号	品牌	描述	获取价格	数据表
LTC3554EPDTRPBF	Linear	Micropower USB Power Manager with Li-Ion Charger and Two Step-Down Regulators	获取价格
LTC3554EUD#PBF	Linear	暂无描述	获取价格
LTC3554EUD-1#PBF	Linear	LTC3554/LTC3554-1/ LTC3554-2/LTC3554-3 - Micropower USB Power Manager with Li-Ion Charger	获取价格
LTC3554EUD-2#PBF	Linear	LTC3554/LTC3554-1/ LTC3554-2/LTC3554-3 - Micropower USB Power Manager with Li-Ion Charger	获取价格
LTC3554EUD-3#PBF	Linear	LTC3554/LTC3554-1/ LTC3554-2/LTC3554-3 - Micropower USB Power Manager with Li-Ion Charger	获取价格
LTC3555	Linear	High Effi ciency USB Power Manager + Triple Step-Down DC/DC	获取价格

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