LTC4098-1 datasheet(1/32 Pages) LINER

部件名	LTC4098-1

功能描述	USB Compatible Switching Power Managers/Li-Ion Chargers with Overvoltage Protection

PDF	32 Pages

Scroll/Zoom	100%

制造商	LINER [Linear Technology]

网页	http://www.linear.com

标志

1 / 32 page

LTC4098/LTC4098-1

1

40981fb

USB Compatible Switching

Power Managers/Li-Ion Chargers

with Overvoltage Protection

The LTC®4098/LTC4098-1 are high efﬁciency USB Power-

Path controllers and full-featured Li-Ion/Polymer battery

chargers. They seamlessly manage power distribution from

multiple sources including USB, wall adapter, automotive,

Firewire or other high voltage DC/DC converters, and a

Li-Ion/Polymer battery.

The LTC4098/LTC4098-1’s internal switching regulator

automatically limits its input current for USB compatibility.

For automotive and other high voltage applications, the

LTC4098/LTC4098-1 interface with a Linear Technology

external switching regulator to provide a high efﬁciency

high voltage power path. Both the USB and the optional

high voltage inputs feature Bat-Track optimized charging

to provide maximum power to the application and ease

thermal issues in high power density applications with

input supplies from 5V to as high as 38V.

An overvoltage circuit protects the LTC4098/LTC4098-1

from high voltage damage on the USB/wall adaptor inputs

with an N-channel FET and a resistor.

The LTC4098/LTC4098-1 are available in the ultra-thin

(0.55mm) 20-lead 3mm

× 4mm QFN surface mount

package.

n Media Players

n GPS

n PDAs

n Smart Phones

n Switching Regulator with Bat-TrackTM Adaptive

Output Control Makes Optimal Use of Limited

Power Available from USB Port to Charge Battery

and Power Application

n Overvoltage Protection Guards Against Damage

n Bat-Track External Step-Down Switching Regulator

Control Maximizes Efﬁciency from Automotive,

Firewire and Other High Voltage Input Sources

n 180m

Ω Internal Ideal Diode Plus External Ideal Diode

Controller Seamlessly Provide Low Loss PowerPathTM

when Input Power is Limited or Unavailable

n Preset 4.2V Charge Voltage with 0.5% Accuracy

(4.1V for LTC4098-1)

n 4.1V Float Voltage (LTC4098-1) Improves Battery Life

and High Temperature Safety Margin

n Instant-On Operation with Discharged Battery

n 700mA Maximum Load Current from USB Port

n 1.5A Maximum Charge Current with Thermal Limiting

n Ultra-Thin (0.55mm) 20-Lead 3mm

× 4mm QFN

High Efﬁciency USB/Automotive Battery Charger with Overvoltage Protection

VBUS

10μF

0.1μF

3.01k

1k

10μF

3.3μH

6.04k

VC

WALL

INPUT

AUTOMOTIVE,

FIREWIRE, ETC.

INPUT

USB

TO μC

SYSTEM

LOAD

40981 TA01a

CLPROG

PROG

LTC4098/LTC4098-1

GND

SW

BATSENS

OVGATE

OVSENS

D0-D2

BAT

VOUT

Li-Ion

+

LT3653

3

USB Switching Regulator Efﬁciency

to System Load (PVOUT/PVBUS)

IVOUT (A)

0.01

0

20

40

60

80

0.1

1

40981 TA01b

100

10

30

50

70

90

BAT = 4.2V

BAT = 3.3V

VBUS = 5V

IBAT = 0mA

10x MODE

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

, 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.

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Linear Technology	LTC4098-1	454Kb / 32P	USB Compatible Switching Power Managers/Li-Ion Chargers with Overvoltage Protection

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