LTC3576EUFE-1-PBF LINER [Linear Technology], LTC3576EUFE-1-PBF Datasheet

LTC3576EUFE-1-PBF

Manufacturer Part Number

LTC3576EUFE-1-PBF

Description

Switching Power Manager with USB On-the-Go + Triple Step-Down DC/DCs

Manufacturer

LINER [Linear Technology]

Datasheet

1.LTC3576EUFE-1-PBF.pdf (48 pages)

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FEATURES

APPLICATIONS

TYPICAL APPLICATION

FIREWIRE, ETC.

AUTOMOTIVE

Bidirectional Switching Regulator with Bat-

Track™ Adaptive Output Control Provides Efﬁ cient

Charging and a 5V Output for USB On-The-Go

Bat-Track Control of External High Voltage Step-

Down Switching Regulator

Overvoltage Protection Guards Against Damage

“Instant-On” Operation with Discharged Battery

Triple Step-Down Switching Regulators with I

Adjustable Outputs (1A/400mA/400mA I

180mΩ Internal Ideal Diode + External Ideal Diode

Controller Powers the Load in Battery Mode

Li-Ion/Polymer Battery Charger (1.5A Max I

Battery Float Voltage: 4.2V (LTC3576), 4.1V (LTC3576-1)

Compact (4mm × 6mm × 0.75mm) 38-pin QFN Package

HDD-Based Media Players

GPS, PDAs, Digital Cameras, Smart Phones

Automotive Compatible Portable Electronics

ADAPTER

USB OR

High Efﬁ ciency PowerPath Manager with Overvoltage Protection

5V AC

CONTROLS

ENABLE

CHARGE

OVERVOLTAGE

LTC3576/LTC3576-1

PROTECTION

and Triple Step-Down Regulator

USB COMPLIANT

BIDIRECTIONAL

REGULATOR

SWITCHING

HIGH EFFICIENCY

REGULATORS

STEP-DOWN

SWITCHING

TRIPLE

EXTERNAL HIGH VOLTAGE

C PORT

CHARGER

BATTERY

BUCK CONTROLLER

CC/CV

LT3653

ALWAYS ON LDO

OUT

CHG

)

0.8V TO 3.6V/400mA

0.8V TO 3.6V/1A

RST

OPTIONAL

3.3V/20mA

Li-Ion

TO OTHER

LOADS

with USB On-the-Go + Triple

DESCRIPTION

The LTC

management and battery charger ICs for Li-Ion/Polymer

battery applications. They each include a high efﬁ ciency,

bidirectional switching PowerPath™ manager with auto-

matic load prioritization, a battery charger, an ideal diode, a

controller for an external high voltage switching regulator

and three general purpose step-down switching regulators

with I

ing regulators automatically limit input current for USB

compatibility and can also generate 5V at 500mA for USB

on-the-go applications when powered from the battery.

Both the USB and external switching regulator power paths

feature Bat-Track optimized charging to provide maximum

power to the application from supplies as high as 38V. An

overvoltage circuit protects the LTC3576/LTC3576-1 from

damage due to high voltage on the V

just two external components. The LTC3576/LTC3576-1 are

available in a low proﬁ le 38-pin (4mm × 6mm × 0.75mm)

QFN package.

L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Bat-Track

and PowerPath are trademarks of Linear Technology Corporation. All other trademarks are the

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

Switching Power Manager

RTC/LOW

POWER LOGIC

MEMORY

μPROCESSOR

I/O

CORE

C adjustable output voltages. The internal switch-

3576 TA01

3576/LTC3576-1 are highly integrated power

Step-Down DC/DCs

LTC3576/LTC3576-1

PowerPath Switching Regulator Efﬁ ciency

100

to System Load (P

10x MODE

BAT

BUS

BAT = 4.2V

= 0mA

= 5V

LOAD CURRENT (mA)

BAT = 3.3V

100

BUS

VOUT

or WALL pins with

VBUS

3576 TA01b

1000

)

3576f

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