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FEATURES

n

LTC4099

I

2

C Controlled

USB Power Manager/Charger

with Overvoltage Protection

DESCRIPTION

The LTC

®

4099 is an I

2

C controlled high efﬁciency USB

PowerPath™ controller and full-featured Li-Ion/Polymer

battery charger. It seamlessly manages power distribution

from multiple sources including USB, a wall adapter and

a Li-Ion/Polymer battery.

The LTC4099 automatically limits its input current for

USB compatibility. For automotive and other high volt-

age applications, the LTC4099 interfaces with an external

switching regulator. Both the USB input and the auxiliary

input controller feature Bat-Track optimized charging to

provide maximum power to the application and reduced

heat in high power density applications.

The I

2

C port allows digital control of important application

parameters including input current limit, charge current

and ﬂoat voltage. Several status bits can also be read back

via I

2

C.

An overvoltage protection circuit guards the LTC4099

from high voltage damage on the low voltage V

BUS

pin.

The LTC4099 is available in the ultra-thin (0.55mm) 20-lead

3mm

×

4mm QFN surface mount package.

, 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, 6570372, 6700364, 6819094. Other patents pending.

n

Switching Regulator with Bat-Track

TM

Adaptive Output

Control Makes Optimal Use of Limited Input Power

I

2

C Port for Optimal System Performance and

Status Information

Input Overvoltage Protection

Bat-Track Control of External Step-Down Switching

Regulator Maximizes Efﬁciency from Automotive

and Other High Voltage Sources

Instant-On Operation with Low Battery

Optional Overtemperature Battery Conditioner

Improves High Temperature Battery Safety Margin

Ideal Diode Seamlessly Connects Battery When Input

Power is Limited or Unavailable

Full-Featured Li-Ion/Polymer Battery Charger

1.5A Maximum Charge Current with Thermal Limiting

Slew Control Reduces Switching EMI

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

×

4mm QFN

APPLICATIONS

n

Media Players

Portable Navigation Devices

Smart Phones

Industrial Handhelds

Portable Medical Instruments

TYPICAL APPLICATION

I

2

C Controlled High Efﬁciency Battery Charger/

USB Power Manager

V

BUS

10μF

OVGATE

6.2k

2

OVSENS

I

2

C

CLPROG PROG

GND

LTC4099

SW

V

OUT

BAT

BATSENS

NTCBIAS

NTC

100k

10μF

SYSTEM

LOAD

POWER DISSIPATION (W)

OVERVOLTAGE

USB PROTECTION

3.3μH

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

Li-Ion

4099 TA01a

Reduced Power Dissipation

vs Linear Battery Charger

LINEAR BATTERY

CHARGER

V

IN

= 5V

I

CHARGE

= 1A

ADDITIONAL POWER

AVAILABLE FOR CHARGING

TO μCONTROLLER

SWITCHING BATTERY

CHARGER

0.1μF

3.01k

1.02k

100k

T

+

0

3.3

3.4

3.5

3.6

3.7

3.8

3.9

4

4.1

4099 TA01b

BATTERY VOLTAGE (V)

4099f

1

LTC4099

ABSOLUTE MAXIMUM RATINGS

(Notes 1, 2, 3)

PIN CONFIGURATION

TOP VIEW

CLPROG

OVSENS

ACPR

SDA

16 SCL

15 DV

CC

21

14 SW

13 V

BUS

12 V

OUT

11 BAT

7

PROG

8

IRQ

9 10

GND

IDGATE

V

BUS

, WALL (Transient) t < 1ms,

Duty Cycle < 1% ...................................... –0.3V to 7V

V

BUS

, WALL (Static), BAT, BATSENS,

IRQ,

NTC, DV

CC

............................................... –0.3V to 6V

SDA, SCL .......... –0.3V to Max (V

BUS

, V

OUT

, BAT) + 0.3V

I

OVSENS

.................................................................±10mA

I

CLPROG

....................................................................3mA

I

PROG

, I

NTCBIAS

.........................................................2mA

I

OUT

, I

SW

, I

BAT

, I

VBUS

...................................................2A

Maximum Junction Temperature........................... 125°C

Operating Temperature Range.................. –40°C to 85°C

Storage Temperature Range................... –65°C to 125°C

I

IRQ

.........................................................................50mA

I

ACPR

......................................................................±5mA

20 19 18 17

OVGATE 1

NTC 2

NTCBIAS 3

V

C

4

WALL 5

BATSENS 6

PDC PACKAGE

20-LEAD (3mm 4mm) PLASTIC UTQFN

T

JMAX

= 125°C,

θ

JA

= 43°C/W

EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB

ORDER INFORMATION

LEAD FREE FINISH

LTC4099EPDC#PBF

TAPE AND REEL

LTC4099EPDC#TRPBF

PART MARKING

DQKT

PACKAGE DESCRIPTION

20-Lead (3mm

×

4mm) Plastic UTQFN

TEMPERATURE RANGE

–40°C to 85°C

Consult LTC Marketing for parts speciﬁed with wider operating temperature ranges.

For more information on lead free part marking, go to:

http://www.linear.com/leadfree/

For more information on tape and reel speciﬁcations, go to:

http://www.linear.com/tapeandreel/

ELECTRICAL CHARACTERISTICS

SYMBOL

V

BUS

I

BUS(LIM)

PARAMETER

Input Supply Voltage

Total Input Current

Input Power Supply

The

l

denotes the speciﬁcations which apply over the full operating temp-

erature range, otherwise speciﬁcations are at T

A

= 25°C. V

BUS

= 5V, BAT = 3.8V, DV

CC

= 3.3V, R

PROG

= 1.02k, R

CLPROG

= 3.01k, unless

otherwise noted.

CONDITIONS

l

MIN

4.35

88

460

580

725

920

1150

0.30

1.6

TYP

MAX

5.5

UNITS

V

mA

100mA Mode

500mA Mode

620mA Mode

790mA Mode

1A Mode

1.2A Mode

Low Power Suspend Mode

High Power Suspend Mode

100mA Mode

500mA, 620mA, 790mA, 1A, 1.2A Modes

Low Power Suspend Mode

High Power Suspend Mode

l

93

485

620

790

965

1220

0.37

2.05

6

15

0.039

0.037

100

500

650

850

1000

1295

0.5

2.5

I

VBUSQ

(Note 4) Input Quiescent Current

4099f

2

LTC4099

ELECTRICAL CHARACTERISTICS

SYMBOL

h

CLPROG

(Note 4)

PARAMETER

Ratio of Measured V

BUS

Current to

CLPROG Program Current

The

l

denotes the speciﬁcations which apply over the full operating temp-

erature range, otherwise speciﬁcations are at T

A

= 25°C. V

BUS

= 5V, BAT = 3.8V, DV

CC

= 3.3V, R

PROG

= 1.02k, R

CLPROG

= 3.01k, unless

otherwise noted.

CONDITIONS

100mA Mode

500mA Mode

620mA Mode

790mA Mode

1A Mode

1.2A Mode

Low Power Suspend Mode

High Power Suspend Mode

100mA Mode, BAT = 3.3V

500mA Mode, BAT = 3.3V

620mA Mode, BAT = 3.3V

790mA Mode, BAT = 3.3V

1A Mode, BAT = 3.3V

1.2A Mode, BAT = 3.3V

Low Power Suspend Mode

High Power Suspend Mode

Switching Modes

Suspend Modes

Rising Threshold

Falling Threshold

V

BUS–BAT

Rising Threshold

V

BUS–BAT

Falling Threshold

Switching Modes, 0V < BAT ≤ 4.2V,

I

VOUT

= 0mA, Battery Charger Off

USB Suspend Modes, I

VOUT

= 250μA

3.5

4.5

1.96

3.90

MIN

TYP

220

1200

1540

1980

2420

3080

10.9

65

135

672

840

1080

1251

1550

0.30

2.16

1.18

102

4.30

4.00

200

50

BAT + 0.3

4.6

2.25

0.18

0.30

500mA to 1.2A Input Limit Modes

3

16

4.200V Setting Selected by I

2

C

4.100V Default Setting

4.179

4.165

4.079

4.065

4.200

4.100

500-1200

475

1140

500

1200

100

3.7

5

525

1260

4.221

4.235

4.121

4.135

4.7

2.65

4.35

MAX

UNITS

mA/mA

mA

V

mV

V

mV

V

MHz

Ω

A

Ω

V

mA

μA

I

VOUT

V

OUT

Current Available Before

Discharging Battery

0.23

1.6

0.41

2.46

V

CLPROG

V

UVLO

V

DUVLO

V

OUT

CLPROG Servo Voltage in Current Limit

V

BUS

Undervoltage Lockout

V

BUS

to BAT Differential Undervoltage

Lockout

V

OUT

Voltage

f

OSC

R

PMOS

R

NMOS

I

PEAK

R

SUSP

Battery Charger

V

FLOAT

Switching Frequency

PMOS On-Resistance

NMOS On-Resistance

Peak Inductor Current Clamp

Suspend LDO Output Resistance

BAT Regulated Output Voltage

l

I

CHG_RANGE

I

CHG500mA

I

CHG1200mA

I

CHG_STEP

I

BATQ

Constant-Current Mode Charge Current

Range

Zero Scale Battery Charge Current

Full-Scale Battery Charge Current

Charge Current I

2

C Step Size

Battery Drain Current

I

LIM2/1/0

= 101, Selectable by I

2

C

I

LIM2/1/0

= 101, I

CHARGE2/1/0

= 000

I

LIM2/1/0

= 101, I

CHARGE2/1/0

= 111

I

LIM2/1/0

= 101

V

BUS

> V

UVLO

, PowerPath Switching

Regulator On, Battery Charger Off,

I

VOUT

= 0μA

V

BUS

= 0V, I

VOUT

= 0μA (Ideal Diode

Mode)

23

0.100

1030

35

μA

V

mA/mA

4099f

V

PROG,TRKL

h

PROG

PROG Pin Servo Voltage in Trickle Charge BAT < V

TRKL

Ratio of I

BAT

to PROG Pin Current

3

LTC4099

ELECTRICAL CHARACTERISTICS

SYMBOL

V

TRKL

ΔV

TRKL

V

RECHRG

t

TERM_RANGE

t

BADBAT

V

C/x

PARAMETER

Trickle Charge Threshold Voltage

Trickle Charge Hysteresis Voltage

Recharge Battery Threshold Voltage

Safety Timer Termination Period Range

Bad Battery Termination Time

Full Capacity Charge Indication PROG

Voltage (Note 5)

Threshold Voltage Relative to V

FLOAT

Selectable by I

2

C, Timer Starts When

BAT = V

FLOAT

BAT < V

TRKL

COVERX1/0 = 00

COVERX1/0 = 01

COVERX1/0 = 10

COVERX1/0 = 11

R

ON_CHG

T

LIM

Battery Charger Power FET

On-Resistance (Between V

OUT

and BAT)

Junction Temperature in Constant-

Temperature Mode

Absolute WALL Input Threshold

Differential WALL Input Threshold

Regulation Target Under V

C

Control

WALL Quiescent Current

ACPR

Pull-Down Strength

ACPR

High Voltage

ACPR

Low Voltage

Overvoltage Protection Threshold

OVGATE Output Voltage

OVSENS Quiescent Current

OVGATE Time to Reach Regulation

Overtemperature Battery Discharge

Current

Maximum Allowed Overtemperature

Battery Voltage

Cold Temperature Fault Threshold

Voltage

I

ACPR

= 0mA

I

ACPR

= 0mA

Rising Threshold, R

OVSENS

= 6.2k

Input Below V

OVCUTOFF

Input Above V

OVCUTOFF

V

OVSENS

= 5V

C

OVGATE

= 1nF

Only When Enabled via I

2

C Control

Only When Enabled via I

2

C Control

6.10

I

BAT

= 200mA

Selectable by I

2

C

0.4

90

40

190

490

–75

The

l

denotes the speciﬁcations which apply over the full operating temp-

erature range, otherwise speciﬁcations are at T

A

= 25°C. V

BUS

= 5V, BAT = 3.8V, DV

CC

= 3.3V, R

PROG

= 1.02k, R

CLPROG

= 3.01k, unless

otherwise noted.

CONDITIONS

BAT Rising

MIN

2.7

TYP

2.85

130

–100

1-8

0.5

100

50

200

500

0.18

85, 105

0.6

110

60

210

510

–125

MAX

3

UNITS

V

mV

Hour

mV

Ω

°C

Bat-Track External Switching Regulator Control

V

WALL

ΔV

WALL

V

OUT

I

WALLQ

R

ACPR

VH

ACPR

VL

ACPR

V

OVCUTOFF

V

OVGATE

I

OVSENSQ

t

RISE

I

DISCHARGE

V

ALLOW

NTC

V

TOO_COLD

V

TOO_WARM

V

OVERTEMP

I

NTC

Rising Threshold

Hysteresis

72.3

31.3

21.9

–50

73.8

3.6

32.6

3.3

22.8

50

75.3

33.9

23.7

50

%NTCBIAS

mV

nA

4099f

Rising Threshold

Falling Threshold

WALL–BAT Rising Threshold

WALL–BAT Falling Threshold

4.15

4.3

3.2

90

37

BAT + 0.3

130

150

V

OUT

0

6.35

1.88 • V

OVSENS

0

40

2.5

180

3.85

4.45

V

mV

V

μA

Ω

V

0

3.5

50

Overvoltage Protection

6.70

12

V

μA

ms

mA

V

Overtemperature Battery Conditioner

Hot Temperature Fault Threshold Voltage Falling Threshold

Hysteresis

Critically High Temperature Fault

Threshold Voltage

NTC Leakage Current

Falling Threshold

Hysteresis

NTC = NTCBIAS

4

LTC4099

ELECTRICAL CHARACTERISTICS

SYMBOL

Ideal Diode

V

FWD

R

DROPOUT

I

MAX

I

2

C Port

DV

CC

I

DVCCQ

V

DVCC_UVLO

ADDRESS

I

2

C Logic Reference

DV

CC

Current

DV

CC

UVLO

I

2

C Address

SCL/SDA = 0kHz

1.6

0.2

1

5.5

V

μA

V

Forward Voltage

Internal Diode On-Resistance, Dropout

Diode Current Limit

I

VOUT

= 10mA

I

VOUT

= 200mA

2

15

0.18

mV

Ω

A

PARAMETER

The

l

denotes the speciﬁcations which apply over the full operating temp-

erature range, otherwise speciﬁcations are at T

A

= 25°C. V

BUS

= 5V, BAT = 3.8V, DV

CC

= 3.3V, R

PROG

= 1.02k, R

CLPROG

= 3.01k, unless

otherwise noted.

CONDITIONS

MIN

TYP

MAX

UNITS

⎡

R

⎤

0001001

⎢ ⎥

⎣

W

⎦

I

IRQ

= 5mA

V

IRQ

= 5V

0.7 •

DV

CC

0.3 •

DV

CC

SDA, SCL = DV

CC

SDA, SCL = 0V

I

SDA

= 3mA

1.3

0.6

0

100

1.3

0.6

50

900

–1

1

0.4

400

65

0

100

1

mV

μA

V

μA

V

kHz

μs

ns

μs

ns

V

IRQ

I

IRQ

V

IH

, SDA, SCL

V

IL

, SDA, SCL

I

IH

, SDA, SCL

I

IL

, SDA, SCL

V

OL

f

SCL

t

BUF

t

HD_SDA

t

SU_SDA

t

SU_STO

t

HD_DAT(OUT)

t

HD_DAT(IN)

t

SU_DAT

t

LOW

t

HIGH

t

SP

IRQ

Pin Output Low Voltage

IRQ

Pin Leakage Current

Input High Threshold

Input Low Threshold

Input Leakage High

Input Leakage Low

Digital Output Low (SDA)

Clock Operating Frequency

Bus Free Time Between Stop and Start

Condition

Hold Time After (Repeated) Start Condi-

tion

Repeated Start Condition Set-Up Time

Stop Condition Time

Data Hold Time

Input Data Hold Time

Data Set-Up Time

Clock Low Period

Clock High Period

Spike Suppression Time

Note 1:

Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2:

The LTC4099 is guaranteed to meet performance speciﬁcations

from 0°C to 85°C. Speciﬁcations over the – 40°C to 85°C operating

temperature range are assured by design, characterization and correlation

with statistical process controls.

Note 3:

The LTC4099 includes overtemperature protection that is intended

to protect the device during momentary overload conditions. Junction

temperature will exceed 125°C when overtemperature protection is active.

Continuous operation above the speciﬁed maximum operating junction

temperature may impair device reliability.

Note 4:

Total input current is the sum of quiescent current, I

VBUSQ

, and

measured current given by:

V

CLPROG

/R

CLPROG

• (h

CLPROG

+ 1)

Note 5:

The PROG pin always represents actual charge current. See the

Full Capacity Charge Indication (C/x) section.

4099f

5

LTC4099

LTC4099概述

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