FEATURES
Power Manager
n
High Efficiency Switching PowerPath™ Controller
with Bat-Track™ 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 4.2V (LTC3586-2) or 4.1V
(LTC3586-3) 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
DC/DCs
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
DC/DC
FAULT
Output
n
Compact (4mm
×
6mm) 38-Pin QFN Package
LTC3586-2/LTC3586-3
High Efficiency USB Power
Manager with Boost,
Buck-Boost and Dual Bucks
DESCRIPTION
The LTC
®
3586-2/LTC3586-3 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 ap-
plications, the LTC3586-2/LTC3586-3’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 LTC3586-2/LTC3586-3 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 LTC3586-2/LTC3586-3 are available in a low profile
(0.75mm) 38-pin 4mm
×
6mm QFN package.
L,
LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks
and 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
n
Portable Medical/Industrial Devices
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
LTC3586-2/LTC3586-3
ALWAYS ON LDO
EN
MODE
I
LIM
2
HIGH EFFICIENCY
BOOST
4
FAULT
5V/800mA
4
DUAL HIGH EFFICIENCY
BUCKS
HIGH EFFICIENCY
BUCK-BOOST
1
2
3
T
CC/CV
BATTERY
CHARGER
0V
OPTIONAL
CHARGE CURRENT (mA)
TO OTHER
LOADS
Battery Charge Current vs
Battery Voltage (LTC3586-2)
700
600
500
400
300
200
100
0
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
BATTERY CHARGE CURRENT
EXTRA CURRENT
FOR FASTER CHARGING
500mA USB CURRENT LIMIT
+
Li-Ion
3.3V/20mA
0.8V TO 3.6V/400mA
0.8V TO 3.6V/400mA
2.5V to 3.3V/1A
MEMORY/
CORE µP
I/O
SYSTEM
AUDIO/
MOTOR
358623 TA01
RTC/LOW
POWER LOGIC
358623 TA01b
358623f
1
LTC3586-2/LTC3586-3
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
GND
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
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
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 Lesser of 6V and (V
IN1
+ 0.3V)
FB2................... – 0.3V to Lesser of 6V and (V
IN2
+ 0.3V)
FB3, V
C3
........... – 0.3V to Lesser of 6V and (V
IN3
+ 0.3V)
EN1, EN2................................– 0.3V to Lesser of 6V and
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
UFE PACKAGE
38-LEAD (4mm
×
6mm) PLASTIC QFN
T
JMAX
= 125°C,
θ
JA
= 38.7°C/W
EXPOSED PAD (PIN 39) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LTC3586EUFE-2#PBF
LTC3586EUFE-3#PBF
TAPE AND REEL
LTC3586EUFE-2#TRPBF
LTC3586EUFE-3#TRPBF
PART MARKING
35862
35863
PACKAGE DESCRIPTION
38-Lead (4mm
×
6mm) Plastic QFN
38-Lead (4mm
×
6mm) Plastic QFN
TEMPERATURE RANGE
– 40°C to 85°C
– 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/
LTC3586 PRODUCT OPTIONS
OPTIONS
LTC3586
LTC3586-1
LTC3586-2
LTC3586-3
FLOAT VOLTAGE (V
FLOAT
)
4.2V
4.1V
4.2V
4.1V
FAULT
PIN FUNCTIONALITY
Bi-Directional with Latch
Bi-Directional with Latch
Output Only, No Latch
Output Only, No Latch
BOOST OVERVOLTAGE
THRESHOLD (V
OV4
)
5.3V
5.3V
5.5V
5.5V
BOOST OVERVOLTAGE
HYSTERESIS (∆V
OV4
)
300mV
300mV
100mV
100mV
358623f
2
LTC3586-2/LTC3586-3
ELECTRICAL CHARACTERISTICS
SYMBOL
V
BUS
I
BUSLIM
PARAMETER
Input Supply Voltage
Total Input Current
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
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
l
l
l
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
MIN
4.35
87
436
800
0.31
95
460
860
0.38
7
15
15
0.044
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
LTC3586-2
LTC3586-2
LTC3586-3
LTC3586-3
4.179
4.165
4.079
4.065
980
185
2
2
3
4.200
4.200
4.100
4.100
1022
204
3.5
29
1.000
BAT < V
TRKL
0.100
100
1022
BAT < V
TRKL
100
4.221
4.235
4.121
4.135
1065
223
5
41
4.7
4.7
2.7
4.35
TYP
MAX
5.5
100
500
1000
0.50
UNITS
V
mA
mA
mA
mA
mA
mA
mA
mA
mA/mA
mA/mA
mA/mA
mA/mA
mA
mA
mA
mA
V
mV
V
V
mV
mV
V
V
MHz
Ω
Ω
A
A
V
V
V
V
mA
mA
µA
µA
V
V
mV
mA/mA
mA
358623f
PowerPath Switching Regulator
I
VBUSQ
V
BUS
Quiescent Current
h
CLPROG
(Note 4)
Ratio of Measured V
BUS
Current to
CLPROG Program Current
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
l
Peak Switch Current Limit (Note 5)
I
CHG
I
BAT
V
PROG
V
PROG_TRKL
V
C/10
h
PROG
I
TRKL
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
V
BUS
> V
UVLO
, I
VOUT
= 0µA
V
BUS
= 0V, I
VOUT
= 0µA (Ideal Diode Mode)
3
LTC3586-2/LTC3586-3
ELECTRICAL CHARACTERISTICS
SYMBOL
V
TRKL
∆V
TRKL
V
RECHRG
t
TERM
t
BADBAT
h
C/10
V
CHRG
I
CHRG
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
FAULT
Pin Output Low Voltage
FAULT
Delay
FBx Voltage Threshold
for FAULT (x = 1, 2, 3, 4)
I
FAULT
= 5mA
65
14
0.736
100
mV
ms
V
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
1.2
1
0mA < I
LDO3V3
< 20mA
V
BUS
= 0V, I
VOUT
= 10mA
I
VOUT
= 10mA
V
BUS
= 0V
1.6
3.1
3.3
4
23
0.4
3.5
2
15
0.18
mV
mV
Ω
A
V
Ω
Ω
V
V
µA
Cold Temperature Fault Threshold
Voltage
Hot Temperature Fault Threshold
Voltage
NTC Disable Threshold Voltage
NTC Leakage Current
Rising Threshold
Hysteresis
Falling Threshold
Hysteresis
Falling Threshold
Hysteresis
V
NTC
= V
BUS
= 5V
75.0
33.4
0.7
–50
76.5
1.5
34.9
1.73
1.7
50
78.0
36.4
2.7
50
%V
BUS
%V
BUS
%V
BUS
%V
BUS
%V
BUS
mV
nA
PARAMETER
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
Battery Charger Power FET
On-Resistance (Between V
OUT
and BAT)
Junction Temperature in Constant
Temperature Mode
Threshold Voltage Relative to V
FLOAT
Timer Starts When BAT = V
FLOAT
BAT < V
TRKL
I
CHRG
= 5mA
V
CHRG
= 5V
0.18
110
–75
3.3
0.42
0.088
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
BAT Rising
MIN
2.7
TYP
2.85
130
–100
4
0.5
0.1
65
–125
5
0.63
0.112
100
1
MAX
3.0
UNITS
V
mV
mV
Hour
Hour
mA/mA
mV
µA
Ω
°C
End-of-Charge Indication Current Ratio (Note 6)
Always On 3.3V Supply
Logic Input (EN1, EN2, EN3, EN4, MODE, ILIM0, ILIM1)
358623f
4
LTC3586-2/LTC3586-3
ELECTRICAL CHARACTERISTICS
SYMBOL
V
IN1,2,3,4
V
OUTUVLO
f
OSC
I
FB1,2,3,4
V
FB1,2,3,4
I
VIN1,2
I
LIM1,2
R
P1,2
R
N1,2
D
1,2
R
SW1,2
I
VIN3
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
PARAMETER
Input Supply Voltage
V
OUT
UVLO—V
OUT
Falling
V
OUT
UVLO—V
OUT
Rising
Oscillator Frequency
FBx Input Current
V
FBx
Servo Voltage
Pulse-Skipping 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
l
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
MIN
2.7
V
IN1,2,3,4
Connected to V
OUT
Through
Low Impedance. Switching Regulators
are Disabled in UVLO
V
FB1,2,3,4
= 0.85V
l
TYP
MAX
5.5
UNITS
V
V
V
MHz
nA
V
µA
µA
µA
mA
Ω
Ω
%
kΩ
Switching Regulators 1, 2, 3 and 4
2.5
2.6
2.8
2.25
0.80
225
35
600
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
–1
10
PWM Mode
PWM Mode
l
2.9
2.7
50
0.82
1.8
–50
0.78
Switching Regulators 1 and 2 (Buck)
I
VOUT1,2
= 0µA, (Note 7)
I
VOUT1,2
= 0µA, (Note 7)
I
VOUT1,2
= 0µA, (Note 7)
Pulse-Skipping/Burst Mode Operation (Note 5)
60
1
1100
Switching Regulator 3 (Buck-Boost)
400
20
1
2.75
µA
µA
µA
V
V
A
mA
mA
mA
Ω
Ω
1
1
µA
µA
kΩ
%
75
0.5
%
ms
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
Switches A, D
Switches B, C
Switches A, D
Switches B, C
100
358623f
5
京公网安备 11010802033920号
EEWORLD
