ltc3566 Linear Technology Corporation, ltc3566 Datasheet

ltc3566

Manufacturer Part Number

ltc3566

Description

High Ef?ciency Usb Power Manager Plus 1a Buck-boost Converter

Manufacturer

Linear Technology Corporation

Datasheet

1.LTC3566.pdf (28 pages)

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FEATURES

APPLICATIONS

POWER MANAGER

■

1A BUCK-BOOST DC/DC

■

TYPICAL APPLICATION

FROM USB

FROM AC

ADAPTER

High Efﬁ ciency Switching PowerPath™ Controller

with Bat-Track™ Adaptive Output Control

Programmable USB or Wall Input Current Limit

(100mA/500mA/1A)

Full Featured Li-Ion/Polymer Battery Charger

“Instant-On” Operation with 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

High Efﬁ ciency (1A I

2.25MHz Constant Frequency Operation

Low No-Load Quiescent Current (~13μA)

Zero Shutdown Current

Pin Control of All Functions

HDD Based MP3 Players, PDA, GPS, PMP Products

Other USB Based Handheld Products

DIGITAL CONTROL

LTC3566 USB Power Manager with 3.3V/1A Buck-Boost

when Powered from BAT (<30μA)

OUT

)

CLPROG

PROG

NTC

CHRG

CHRGEN

ILIM0

ILIM1

MODE

EN1

BUS

GND

EXPOSED PAD

LTC3566

LDO3V3

SWAB1

SWCD1

GATE

OUT1

3566 TA01

BAT

VC1

OUT

FB1

IN1

DESCRIPTION

The LTC

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

tions. It includes a high efﬁ ciency current limited switching

PowerPath manager with automatic load prioritization,

a battery charger, an ideal diode, and a high efﬁ ciency

synchronous buck-boost switching regulator. Designed

speciﬁ cally for USB applications, the LTC3566’s switch-

ing power manager limits input current to a maximum of

either 100mA or 500mA for USB applications or 1A for

adapter-powered applications.

The LTC3566’s switching input stage transmits nearly all of

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

with minimal power wasted as heat. This feature allows

the LTC3566 to provide more power to the application

and eases the constraint of thermal budgeting in small

spaces.

The synchronous buck-boost DC/DC can provide up to 1A.

The LTC3566 is available in a low proﬁ le 24-lead 4mm ×

4mm QFN surface mount package.

L, LT, LTC, LTM and Burst Mode 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, 6404251.

High Efﬁ ciency USB Power

Li-Ion

Manager Plus 1A Buck-

Electrical Specifications Subject to Change

3566 is a highly integrated power management

3.3V/1A

HDD

BAT + 300mV

OTHER DC/DCs

3.3V/25mA

ALWAYS

ON LDO

OUT

Boost Converter

0.01

100

Switching Regulator Efﬁ ciency to

BAT = 4.2V

10x MODE

BAT

BUS

System Load (P

= 0mA

= 5V

BAT = 3.3V

LTC3566

OUT

0.1

(A)

OUT

BUS

)

3566 TA01b

3566p

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