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FEATURES

Power Manager

n

High Efﬁciency Switching PowerPath

TM

Controller

with Bat-Track

TM

Adaptive Output Control and

“Instant-On” Operation

n

Programmable USB or Wall Current Limit

(100mA/500mA/1A)

n

Full Featured Li-Ion/Polymer Battery Charger with

Float Voltage of 4.1V (LTC3586-1) or 4.2V (LTC3586)

with 1.5A Maximum Charge Current

n

Internal 180mΩ Ideal Diode Plus External Ideal Diode

Controller Powers Load in Battery Mode

n

<30μA No-Load Quiescent Current when Powered

from BAT

n

Dual High Efﬁciency Buck DC/DCs (400mA I

OUT

)

n

High Efﬁciency Buck-Boost DC/DC (1A I

OUT

)

n

High Efﬁciency Boost DC/DC (800mA I

OUT

)

n

Compact (4mm

×

6mm

×

0.75mm) 38-Pin QFN

Package

LTC3586/LTC3586-1

High Efﬁciency USB Power

Manager with Boost,

Buck-Boost and Dual Bucks

DESCRIPTION

The LTC

®

3586/LTC3586-1 are highly integrated power

management and battery charger ICs for Li-Ion/Polymer

battery applications. They include a high efﬁciency cur-

rent limited switching PowerPath manager with automatic

load prioritization, battery charger, ideal diode, and four

synchronous switching regulators (two bucks, one buck-

boost and one boost). Designed speciﬁcally for USB

applications, the LTC3586/LTC3586-1’s switching power

manager automatically limits input current to a maximum

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

adapter-powered applications.

Unlike linear chargers, the LTC3586/LTC3586-1 switching

architecture transmits nearly all of the power available from

the USB port to the load with minimal loss and heat which

eases thermal constraints in small places. The two buck

regulators can provide up to 400mA each, the buck-boost

can deliver 1A, and the boost delivers at least 800mA.

The LTC3586/LTC3586-1 are available in a low proﬁle

(0.75mm) 38-pin 4mm

×

6mm QFN 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, 6404251.

APPLICATIONS

n

Digital Still Cameras

HDD-Based MP3 Players, PDAs, GPS, PMPs

Other USB-Based Handheld Products

TYPICAL APPLICATION

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

USB/WALL

4.5V TO 5.5V

USB COMPLIANT

STEP-DOWN

REGULATOR

CURRENT

CONTROL

CHARGE

T

LTC3586/LTC3586-1

ALWAYS ON LDO

4

EN

MODE

2

I

LIM

HIGH EFFICIENCY

BOOST

4

FAULT

5V/800mA

AUDIO/

MOTOR

3586 TA01

TO OTHER

LOADS

700

0V

OPTIONAL

600

CHARGE CURRENT (mA)

Battery Charge Current vs

Battery Voltage (LTC3586)

BATTERY CHARGE CURRENT

EXTRA CURRENT

FOR FASTER CHARGING

500mA USB CURRENT LIMIT

CC/CV

BATTERY

CHARGER

+

500

400

300

200

100

Li-Ion

3.3V/20mA

0.8V TO 3.6V/400mA

MEMORY/

CORE μP

I/O

SYSTEM

RTC/LOW

POWER LOGIC

DUAL HIGH EFFICIENCY

BUCKS

HIGH EFFICIENCY

BUCK-BOOST

1

2

3

2.5V to 3.3V/1A

V

BUS

= 5V

5x MODE

BATTERY CHARGER PROGRAMMED FOR 1A

2.8

3

3.2 3.4 3.6

3.8

BATTERY VOLTAGE (V)

4

4.2

0

3586 TA01b

3586fa

1

LTC3586/LTC3586-1

ABSOLUTE MAXIMUM RATINGS

(Notes 1, 5)

PIN CONFIGURATION

TOP VIEW

FAULT

V

BUS

V

BUS

V

OUT

EN4

BAT

31 GATE

30

CHRG

29 PROG

28 FB1

27 V

IN1

39

26 SW1

25 SW2

24 V

IN2

23 FB2

22 V

IN4

21 EN1

20 EN2

13 14 15 16 17 18 19

V

IN3

V

IN3

V

OUT3

V

OUT3

EN3

SWCD3

SWAB3

SW

V

BUS

(Transient) t < 1ms,

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

V

IN1

, V

IN2

, V

IN3

, V

IN4

, V

BUS

(Static),

BAT, NTC,

CHRG, FAULT,

I

LIM0

, I

LIM1

,

EN3, EN4, MODE, FB4, V

OUT4

.....................– 0.3V to 6V

FB1...............................................– 0.3V to (V

IN1

+ 0.3V)

FB2...............................................– 0.3V to (V

IN2

+ 0.3V)

FB3, V

C3

.......................................– 0.3V to (V

IN3

+ 0.3V)

EN1, EN2............– 0.3V to Max (V

BUS,

V

OUT,

BAT) + 0.3V

I

CLPROG

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

I

FAULT

, I

CHRG

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

I

PROG

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

I

LDO3V3

...................................................................30mA

I

SW1

, I

SW2

............................................................600mA

I

SW

, I

BAT

, I

VOUT

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

I

SWAB3

, I

SWCD3

, I

SW4

, I

VOUT3

...................................2.5A

Operating Temperature Range (Note 2)....–40°C to 85°C

Junction Temperature (Note 3) ............................. 125°C

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

38 37 36 35 34 33 32

I

LIM0

1

I

LIM1

2

LDO3V3 3

CLPROG 4

NTC 5

V

OUT4

6

V

OUT4

7

SW4 8

MODE 9

FB4 10

FB3 11

V

C3

12

UFE PACKAGE

38-LEAD (4mm 6mm) PLASTIC QFN

T

JMAX

= 125°C,

θ

JA

= 34°C/W

EXPOSED PAD (PIN 39) IS GND, MUST BE SOLDERED TO PCB

ORDER INFORMATION

LEAD FREE FINISH

LTC3586EUFE#PBF

LTC3586EUFE-1#PBF

TAPE AND REEL

LTC3586EUFE#TRPBF

LTC3586EUFE-1#TRPBF

PART MARKING

3586

35861

PACKAGE DESCRIPTION

38-Lead (4mm

×

6mm) Plastic QFN

38-Lead (4mm

×

6mm) Plastic QFN

TEMPERATURE RANGE

– 40°C to 85°C

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

Consult LTC Marketing for information on non-standard lead based ﬁnish parts.

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

BUSLIM

PARAMETER

Input Supply Voltage

Total Input Current

PowerPath Switching Regulator

The

l

denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at T

A

= 25°C. V

BUS

= 5V, BAT = 3.8V, V

IN1

= V

IN2

= V

IN3

= V

IN4

= V

OUT3

= 3.8V,

V

OUT4

= 5V, R

PROG

= 1k, R

CLPROG

= 3.01k, unless otherwise noted.

CONDITIONS

MIN

4.35

1x Mode, V

OUT

= BAT

5x Mode, V

OUT

= BAT

10x Mode, V

OUT

= BAT

Suspend Mode, V

OUT

= BAT

1x Mode, I

VOUT

= 0mA

5x Mode, I

VOUT

= 0mA

10x Mode, I

VOUT

= 0mA

Suspend Mode, I

VOUT

= 0mA

l

TYP

MAX

5.5

UNITS

V

mA

3586fa

87

436

800

0.31

95

460

860

0.38

7

15

0.044

100

500

1000

0.50

I

VBUSQ

V

BUS

Quiescent Current

2

LTC3586/LTC3586-1

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

temperature range, otherwise speciﬁcations are at T

A

= 25°C. V

BUS

= 5V, BAT = 3.8V, V

IN1

= V

IN2

= V

IN3

= V

IN4

= V

OUT3

= 3.8V,

V

OUT4

= 5V, R

PROG

= 1k, R

CLPROG

= 3.01k, unless otherwise noted.

CONDITIONS

1x Mode

5x Mode

10x Mode

Suspend Mode

1x Mode, BAT = 3.3V

5x Mode, BAT = 3.3V

10x Mode, BAT = 3.3V

Suspend Mode

MIN

TYP

224

1133

2140

9.3

135

672

1251

0.32

1.188

100

3.95

4.30

4.00

200

50

3.5

4.5

1.8

BAT + 0.3

4.6

2.25

0.18

0.30

1x, 5x Modes

10x Mode

LTC3586

LTC3586-1

4.179

4.165

4.079

4.065

980

185

2

3

4.200

4.100

1022

204

3.5

29

1.000

BAT < V

TRKL

0.100

100

1022

BAT < V

TRKL

BAT Rising

Threshold Voltage Relative to V

FLOAT

Timer Starts When BAT = V

FLOAT

BAT < V

TRKL

I

CHRG

= 5mA

V

CHRG

= 5V

2.7

–75

3.3

0.42

0.088

100

2.85

135

–100

4

0.5

0.1

65

–125

5

0.63

0.112

100

1

3.0

4.221

4.235

4.121

4.135

1065

223

5

41

4.7

2.7

4.35

MAX

UNITS

mA/mA

mA

V

mV

V

mV

V

MHz

Ω

A

V

mA

μA

V

mV

mA/mA

mA

V

mV

Hour

mA/mA

mV

μA

I

OUT(POWERPATH)

V

OUT

Current Available Before Loading

BAT

V

CLPROG

V

UVLO_VBUS

V

UVLO_VBUS-BAT

V

OUT

CLPROG Servo Voltage in Current Limit 1x, 5x, 10x Modes

Suspend Mode

V

BUS

Undervoltage Lockout

V

BUS

to BAT Differential Undervoltage

Lockout

V

OUT

Voltage

Rising Threshold

Falling Threshold

Rising Threshold

Falling Threshold

1x, 5x, 10x Modes, 0V < BAT < 4.2V,

I

VOUT

= 0mA, Battery Charger Off

USB Suspend Mode, I

VOUT

= 250μA

f

OSC

Switching Frequency

R

PMOS_POWERPATH

PMOS On-Resistance

R

NMOS_POWERPATH

NMOS On-Resistance

I

PEAK_POWERPATH

Battery Charger

V

FLOAT

BAT Regulated Output Voltage

l

Peak Switch Current Limit (Note 5)

I

CHG

I

BAT

V

PROG

V

PROG_TRKL

V

C/10

h

PROG

I

TRKL

V

TRKL

ΔV

TRKL

V

RECHRG

t

TERM

t

BADBAT

h

C/10

V

CHRG

I

CHRG

Constant Current Mode Charge Current R

PROG

= 1k

R

PROG

= 5k

Battery Drain Current

PROG Pin Servo Voltage

PROG Pin Servo Voltage in Trickle

Charge

C/10 Threshold Voltage at PROG

Ratio of I

BAT

to PROG Pin Current

Trickle Charge Current

Trickle Charge Threshold Voltage

Trickle Charge Hysteresis Voltage

Recharge Battery Threshold Voltage

Safety Timer Termination

Bad Battery Termination Time

CHRG

Pin Output Low Voltage

CHRG

Pin Leakage Current

V

BUS

> V

UVLO

, I

VOUT

= 0μA

V

BUS

= 0V, I

VOUT

= 0μA (Ideal Diode Mode)

End-of-Charge Indication Current Ratio (Note 6)

3586fa

3

LTC3586/LTC3586-1

ELECTRICAL CHARACTERISTICS

SYMBOL

R

ON_CHG

T

LIM

NTC

V

COLD

V

HOT

V

DIS

I

NTC

Ideal Diode

V

FWD

R

DROPOUT

I

MAX_DIODE

V

LDO3V3

R

CL_LDO3V3

R

OL_LDO3V3

V

IL

V

IH

I

PD

FAULT

Output

V

FAULT

Pin Output Low Voltage

FAULT

Delay

FBx Voltage Threshold

for FAULT (x = 1, 2, 3, 4)

Switching Regulators 1, 2, 3 and 4

V

IN1,2,3,4

V

OUTUVLO

Input Supply Voltage

V

OUT

UVLO—V

OUT

Falling

V

OUT

UVLO—V

OUT

Rising

Oscillator Frequency

FBx Input Current

V

FBx

Servo Voltage

V

FB1,2,3,4

= 0.85V

l

The

l

denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at T

A

= 25°C. V

BUS

= 5V, BAT = 3.8V, V

IN1

= V

IN2

= V

IN3

= V

IN4

= V

OUT3

= 3.8V,

V

OUT4

= 5V, R

PROG

= 1k, R

CLPROG

= 3.01k, unless otherwise noted.

PARAMETER

Battery Charger Power FET

On-Resistance (Between V

OUT

and BAT)

Junction Temperature in Constant

Temperature Mode

Cold Temperature Fault Threshold

Voltage

Hot Temperature Fault Threshold

Voltage

NTC Disable Threshold Voltage

NTC Leakage Current

Forward Voltage

Internal Diode On-Resistance, Dropout

Internal Diode Current Limit

Regulated Output Voltage

Closed-Loop Output Resistance

Dropout Output Resistance

Logic Low Input Voltage

Logic High Input Voltage

Pull-Down Current

I

FAULT

= 5mA

1.2

1

65

14

0.736

100

0mA < I

LDO3V3

< 20mA

Rising Threshold

Hysteresis

Falling Threshold

Hystersis

Falling Threshold

Hysteresis

V

NTC

= V

BUS

= 5V

V

BUS

= 0V, I

VOUT

= 10mA

I

VOUT

= 10mA

V

BUS

= 0V

1.6

3.1

3.3

4

23

0.4

3.5

75.0

33.4

0.7

–50

2

15

0.18

CONDITIONS

MIN

TYP

0.18

110

MAX

UNITS

Ω

°C

76.5

1.5

34.9

1.5

1.7

50

78.0

36.4

2.7

50

%V

BUS

%V

BUS

%V

BUS

%V

BUS

%V

BUS

mV

nA

mV

Ω

A

V

Ω

V

μA

mV

ms

V

Always On 3.3V Supply

Logic Input (EN1, EN2, EN3, EN4, MODE, ILIM0, ILIM1,

FAULT)

2.7

V

IN1,2,3,4

Connected to V

OUT

Through

Low Impedance. Switching Regulators

are Disabled in UVLO

2.5

2.6

2.8

2.25

0.80

5.5

2.9

2.7

50

0.82

V

MHz

nA

V

f

OSC

I

FB1,2,3,4

V

FB1,2,3,4

1.8

–50

0.78

3586fa

4

LTC3586/LTC3586-1

ELECTRICAL CHARACTERISTICS

SYMBOL

I

VIN1,2

PARAMETER

Pulse-Skip Mode Input Current

Burst Mode

®

Input Current

Shutdown Input Current

PMOS Switch Current Limit

PMOS R

DS(ON)

NMOS R

DS(ON)

Maximum Duty Cycle

SW1,2 Pull-Down in Shutdown

Input Current

PWM Mode, I

VOUT3

= 0μA

Burst Mode Operation, I

VOUT3

= 0μA

Shutdown

For Burst Mode Operation or PWM Mode

5.5

PWM Mode (Note 5)

l

The

l

denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at T

A

= 25°C. V

BUS

= 5V, BAT = 3.8V, V

IN1

= V

IN2

= V

IN3

= V

IN4

= V

OUT3

= 3.8V,

V

OUT4

= 5V, R

PROG

= 1k, R

CLPROG

= 3.01k, unless otherwise noted.

CONDITIONS

I

VOUT1,2

= 0μA, (Note 7)

I

VOUT1,2

= 0μA, (Note 7)

I

VOUT1,2

= 0μA, (Note 7)

Pulse-Skip/Burst Mode Operation (Note 5)

600

MIN

TYP

225

35

800

0.6

0.7

100

10

220

13

0

2.65

5.6

2.5

275

0

3

350

30

2

200

–30

50

0.22

0.17

–1

10

PWM Mode

l

MAX

UNITS

μA

mA

Ω

%

kΩ

Switching Regulators 1 and 2 (Buck)

60

1

1100

I

LIM1,2

R

P1,2

R

N1,2

D

1,2

R

SW1,2

I

VIN3

Switching Regulator 3 (Buck-Boost)

400

20

1

2.75

μA

V

A

mA

Ω

1

μA

kΩ

%

75

0.5

FB4 = 0V, I

VOUT4

= 0μA

Shutdown, V

OUT4

= 0V

FB4 = 0V

(Note 5)

2000

5.1

180

1

7.5

2800

5

5.3

0.3

5.5

%

ms

μA

mA

V

OUT3(LOW)

V

OUT3(HIGH)

I

LIMF3

I

PEAK3(BURST)

I

ZERO3(BURST)

I

MAX3(BURST)

R

DS(ON)P

R

DS(ON)N

I

LEAK(P)

I

LEAK(N)

R

VOUT3

D

BUCK(MAX)

D

BOOST(MAX)

t

SS3

I

VIN4

I

VOUT4

I

LIMF4

V

OUT4

V

OV4

ΔV

OV4

Minimum Regulated Output Voltage

Maximum Regulated Output Voltage

Forward Current Limit (Switch A)

Forward Burst Current Limit (Switch A) Burst Mode Operation

Reverse Burst Current Limit (Switch D) Burst Mode Operation

Maximum Deliverable Output Current in 2.7V ≤ V

IN3

≤ 5.5V, 2.75V ≤ V

OUT3

≤ 5.5V

Burst Mode Operation

(Note 8)

PMOS R

DS(ON)

NMOS R

DS(ON)

PMOS Switch Leakage

NMOS Switch Leakage

V

OUT3

Pull-Down in Shutdown

Maximum Buck Duty Cycle

Maximum Boost Duty Cycle

Soft-Start Time

Input Current

Q-Current Drawn from Boost Output

NMOS Switch Current Limit

Output Voltage Adjust Range

Overvoltage Shutdown

Overvoltage Shutdown Hysteresis

Switches A, D

Switches B, C

Switches A, D

Switches B, C

100

Switching Regulator 4 (Boost)

Burst Mode is a registered trademark of Linear Technology Corporation.

3586fa

5

LTC3586EUFE-TRPBF

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