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PDF LTC3586-2 Data sheet ( Hoja de datos )

Número de pieza LTC3586-2
Descripción High Efficiency USB Power Manager
Fabricantes Linear 
Logotipo Linear Logotipo



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LTC3586-2/LTC3586-3
FEATURES
High Efficiency USB Power
Manager with Boost,
Buck-Boost and Dual Bucks
DESCRIPTION
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 IOUT)
n High Efficiency Buck-Boost DC/DC (1A IOUT)
n High Efficiency Boost DC/DC (800mA IOUT)
n DC/DC FAULT Output
n Compact (4mm × 6mm) 38-Pin QFN Package
APPLICATIONS
n Portable Medical/Industrial Devices
n Other USB-Based Handheld Products
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.
TYPICAL APPLICATION
High Efficiency PowerPath Manager, Dual Buck, Buck-Boost and Boost
USB/WALL
4.5V TO 5.5V
CHARGE
4
EN
MODE
2
ILIM
USB COMPLIANT
STEP-DOWN
REGULATOR
CURRENT
CONTROL
CC/CV
BATTERY
CHARGER
0V
LTC3586-2/LTC3586-3
ALWAYS ON LDO
DUAL HIGH EFFICIENCY
BUCKS
HIGH EFFICIENCY
BUCK-BOOST
1
2
3
HIGH EFFICIENCY
BOOST
4
TO OTHER
LOADS
OPTIONAL
+
T Li-Ion
3.3V/20mA
0.8V TO 3.6V/400mA
0.8V TO 3.6V/400mA
RTC/LOW
POWER LOGIC
MEMORY/
CORE µP
2.5V to 3.3V/1A I/O
SYSTEM
FAULT
5V/800mA
AUDIO/
MOTOR
358623 TA01
Battery Charge Current vs
Battery Voltage (LTC3586-2)
700
BATTERY CHARGE CURRENT
600
EXTRA CURRENT
500 FOR FASTER CHARGING
500mA USB CURRENT LIMIT
400
300
200
100
VBUS = 5V
5x MODE
BATTERY CHARGER PROGRAMMED FOR 1A
0
2.8 3 3.2 3.4 3.6 3.8 4 4.2
BATTERY VOLTAGE (V)
358623 TA01b
358623f
1

1 page




LTC3586-2 pdf
LTC3586-2/LTC3586-3
E LECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
tVeOmUTp4er=a5tuVr,eRrPaRnOgGe,=o1tkh,erRwCiLsPeROsGpe=c3if.ic0a1tki,onusnlaersesaotthTeAr=w2is5e°Cn.otVeBdU.S = 5V, BAT = 3.8V, VIN1 = VIN2 = VIN3 = VIN4 = VOUT3 = 3.8V,
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX
Switching Regulators 1, 2, 3 and 4
VIN1, 2, 3, 4
VOUTUVLO
Input Supply Voltage
VOUT UVLO—VOUT Falling
VOUT UVLO—VOUT Rising
VIN1,2,3,4 Connected to VOUT Through
Low Impedance. Switching Regulators
are Disabled in UVLO
2.7 5.5
2.5 2.6
2.8 2.9
fOSC Oscillator Frequency
IFB1, 2, 3, 4
FBx Input Current
VFB1, 2, 3, 4
VFBx Servo Voltage
Switching Regulators 1 and 2 (Buck)
VFB1,2,3,4 = 0.85V
1.8 2.25 2.7
–50 50
l 0.78 0.80 0.82
IVIN1,2
Pulse-Skipping Mode Input Current
Burst Mode® Input Current
Shutdown Input Current
ILIM1,2
PMOS Switch Current Limit
RP1,2
PMOS RDS(ON)
RN1,2
NMOS RDS(ON)
D1,2 Maximum Duty Cycle
RSW1,2
SW1,2 Pull-Down in Shutdown
Switching Regulator 3 (Buck-Boost)
IIIVVVOOOUUUTTT111,,,
2
2
2
=
=
=
0µA,
0µA,
0µA,
(Note
(Note
(Note
7)
7)
7)
Pulse-Skipping/Burst Mode Operation (Note 5)
225
35 60
1
600 800 1100
0.6
0.7
100
10
IVIN3 Input Current
PWM
Burst
MMooddee,OIVpOeUraTt3io=n0, µIVAOUT3
=
0µA
Shutdown
220 400
13 20
01
VOUT3(LOW)
VOUT3(HIGH)
ILIMF3
IPEAK3(BURST)
IZERO3(BURST)
IMAX3(BURST)
Minimum Regulated Output Voltage For Burst Mode Operation or PWM Mode
Maximum Regulated Output Voltage
Forward Current Limit (Switch A)
PWM Mode (Note 5)
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 ≤ VIN3 ≤ 5.5V, 2.75V ≤ VOUT3 ≤ 5.5V
Burst Mode Operation
(Note 8)
2.65 2.75
5.5 5.6
l 2 2.5 3
l 200 275 350
l –30
0
30
50
RDS(ON)P
RDS(ON)N
ILEAK(P)
ILEAK(N)
RVOUT3
DBUCK(MAX)
DBOOST(MAX)
tSS3
PMOS RDS(ON)
NMOS RDS(ON)
PMOS Switch Leakage
NMOS Switch Leakage
VOUT3 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
PWM Mode
PWM Mode
–1
–1
l 100
0.22
0.17
10
75
0.5
1
1
UNITS
V
V
V
MHz
nA
V
µA
µA
µA
mA
Ω
Ω
%
µA
µA
µA
V
V
A
mA
mA
mA
Ω
Ω
µA
µA
%
%
ms
358623f
5

5 Page





LTC3586-2 arduino
LTC3586-2/LTC3586-3
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise noted.)
Buck-Boost Step Response
VOUT3
100mV/DIV
AC-
COUPLED
IVOU3T030mA
200mA/DIV
0
VIN3 = 3.8V
VOUT3 = 3.3V
100µs/DIV
358623 G33
Boost Efficiency (VIN4 = 3.8V)
100
90
VOUT4 = 5V
80
70
EFFICIENCY
60
50
40 POWER LOSS
0.7
0.6
0.5
0.4
0.3
30 0.2
20
10 0.1
00
1 10 100 1000
IVOUT4 (mA)
358623 G23
Boost Efficiency vs VIN4
100
90
80
70
60
50
SYNCH
PMOS
40 OFF
30
20
10
0
2.6
IVOUT4 = 300mA
VOUT4 = 5V
3 3.4 3.8 4.2 4.6 5
INPUT VOLTAGE VIN4 (V)
5.4
358623 G35
Boost Output Voltage
vs Temperature
5.000
4.995
4.990
4.985
VIN4 = 2.7V
VIN4 = 4.5V
4.980
4.975
VIN4 = 3.8V
4.970
4.965
4.960
4.955
4.950
–45 –30 –15 0 15 30 45 60 75 90
TEMPERATURE (°C)
358623 G36
Maximum Deliverable Boost
Output Current
2200
2000
1800
L = 2.2µH
VOUT4 = 4.9V (SET FOR 5V)
1600
1400
1200
1000
T = –45°C
T = 90°C
T = 25°C
800
600
400
200
0
2.7 3 3.3 3.6 3.9 4.2
VIN4 (V)
4.5
358623 G37
Maximum Boost Duty Cycle
vs VIN4
100
Boost Step Response
(50mA to 300mA)
95
T = 90°C
90
T = 25°C
T = –45°C
85
80
2.7 3 3.3 3.6 3.9 4.2 4.5
VIN4 (V)
358623 G38
VOUT4
100mV/DIV
AC-
COUPLED
IVOU3T040mA
125mA/DIV
50mA
VIN4 = 3.8V
VOUT4 = 5V
L = 2.2µH
C = 10µF
50µs/DIV
358623 G39
358623f
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11 Page







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