Datasheet > LTC3556EUFD-TRPBF

LTC3556EUFD-TRPBF

更新时间： 2024-11-11 05:43:55

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
36页	342K
描述
High Effi ciency USB Power Manager with Dual Buck and Buck-Boost DC/DCs

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LTC3556

High Efﬁciency USB Power

Manager with Dual Buck

and Buck-Boost DC/DCs

FEATURES

POWER MANAGER

DESCRIPTION

The LTC^®3556 is a highly integrated power management

and battery charger IC for Li-Ion/Polymer battery applica-

tions.Itincludesahighefﬁciencycurrentlimitedswitching

PowerPath manager with automatic load prioritization, a

battery charger, an ideal diode, and three synchronous

switching regulators (two bucks and one buck-boost).

Designed speciﬁcally for USB applications, the LTC3556’s

switching power manager automatically limits input cur-

rent to a maximum of either 100mA or 500mA for USB

applications or 1A for adapter-powered applications.

High Efﬁciency Switching PowerPath^TMController

with Bat-Track^TMAdaptive Output Control

Programmable USB or Wall Current Limit

(100mA/500mA/1A)

Full Featured Li-Ion/Polymer Battery Charger

Instant-On Operation with a Discharged Battery

1.5A Maximum Charge Current

Internal 180mΩ Ideal Diode Plus External Ideal Diode

Controller Powers Load in Battery Mode

Low No-Load I when Powered from BAT (<30μA)

TheLTC3556’sswitchinginputstagetransmitsnearlyallof

the 2.5W available from the USB port to the system load

with minimal power wasted as heat. This feature allows

the LTC3556 to provide more power to the application and

easestheconstraintofthermalbudgetinginsmallspaces.

The two buck regulators can provide up to 400mA each

and the buck-boost can deliver 1A.

DC/DCs

Dual High Efﬁciency Buck DC/DCs (400mA/400mA I

)

OUT

High Efﬁciency Buck-Boost DC/DC (1A I

All Regulators Operate at 2.25MHz

)

OUT

Dynamic Voltage Scaling on Two Buck Outputs

I C Control of Enables, Mode, Two V

Settings

OUT

ENALL Pin with Power-Up Sequence Control

Low No-Load Quiescent Current: 20μA Each

The LTC3556 is available in the low proﬁle 28-pin (4mm

× 5mm × 0.75mm) QFN surface mount package.

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

and Bat-Track are trademarks of Linear Technology Corporation. All other trademarks are the

property of their respective owners. Protected by U.S. Patents including 6522118 and 6404251.

APPLICATIONS

HDD-Based MP3 Players, PDAs, GPS, PMPs

Other USB-Based Handheld Products

TYPICAL APPLICATION

Battery Charge Current

vs Battery Voltage

High Efﬁciency PowerPath Manager, Dual Buck, Buck-Boost and LDO

USB/WALL

4.5V TO 5.5V

TO OTHER

LOADS

USB COMPLIANT

STEP-DOWN

REGULATOR

700

600

500

400

300

200

100

BATTERY CHARGE CURRENT

EXTRA CURRENT

FOR FASTER CHARGING

CC/CV

BATTERY

CHARGER

OPTIONAL

Li-Ion

500mA USB CURRENT LIMIT

CHARGE

LTC3556

3.3V/25mA

RTC/LOW

POWER LOGIC

ALWAYS ON LDO

= 5V

BUS

5X MODE

0.8V TO 3.6V/400mA

MEMORY

CORE

μP

BATTERY CHARGER PROGRAMMED FOR 1A

DUAL HIGH EFFICIENCY

ENALL

BUCKS

2.8

3.2 3.4 3.6

3.8

4.2

BATTERY VOLTAGE (V)

HIGH EFFICIENCY

BUCK-BOOST

SEQ

2.5V to 3.3V/1A

PGOODALL

3556 TA01b

HDD/IO

I C

I C PORT

3556 TA01

3556f

12 3 4 5 6 7...36

中文翻译

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与LTC3556EUFD-TRPBF相关器件

型号	品牌	获取价格	描述	数据表
LTC3557	Linear	获取价格	USB Power Manager with Li-Ion Charger and Three Step-Down Regulators
LTC3557	ADI	获取价格	具锂离子电池充电器和三个降压型稳压器的USB电源管理器
LTC3557_15	Linear	获取价格	USB Power Manager with Li-Ion Charger and Three Step-Down Regulators
LTC3557-1	Linear	获取价格	High Efficiency Battery Charger/USB Power Manager
LTC3557-1_15	Linear	获取价格	USB Power Manager with Li-Ion Charger and Three Step-Down Regulators
LTC3557EUF#PBF	Linear	获取价格	LTC3557/LTC3557-1 - USB Power Manager with Li-Ion Charger and Three Step-Down Regulators;
LTC3557EUF-1#PBF	Linear	获取价格	LTC3557/LTC3557-1 - USB Power Manager with Li-Ion Charger and Three Step-Down Regulators;
LTC3557EUF-1-PBF	Linear	获取价格	USB Power Manager with Li-Ion Charger and Three Step-Down Regulators
LTC3557EUF-1-TRPBF	Linear	获取价格	USB Power Manager with Li-Ion Charger and Three Step-Down Regulators
LTC3557EUF-PBF	Linear	获取价格	USB Power Manager with Li-Ion Charger and Three Step-Down Regulators

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