LTC3586/LTC3586-1
High Efficiency USB Power
Manager with Boost,
Buck-Boost and Dual Bucks
DESCRIPTION
FEATURES
Power Manager
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-
rentlimitedswitchingPowerPathmanagerwithautomatic
load prioritization, battery charger, ideal diode, and four
synchronous switching regulators (two bucks, one buck-
boost and one boost). Designed specifically for USB
High Efficiency Switching PowerPathTM Controller
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with Bat-TrackTM Adaptive Output Control and
“Instant-On” Operation
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Programmable USB or Wall Current Limit
(100mA/500mA/1A)
Full Featured Li-Ion/Polymer Battery Charger with
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Float Voltage of 4.1V (LTC3586-1) or 4.2V (LTC3586) applications, the LTC3586/LTC3586-1’s switching power
with 1.5A Maximum Charge Current
Internal 180mΩ Ideal Diode Plus External Ideal Diode
Controller Powers Load in Battery Mode
<30μA No-Load Quiescent Current when Powered
from BAT
manager automatically limits input current to a maximum
of either 100mA or 500mA for USB applications or 1A for
adapter-powered applications.
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Unlike linear chargers, the LTC3586/LTC3586-1 switching
architecturetransmitsnearlyallofthepoweravailablefrom
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.
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Dual High Efficiency Buck DC/DCs (400mA I
)
OUT
)
High Efficiency Buck-Boost DC/DC (1A I
OUT
High Efficiency Boost DC/DC (800mA I
)
OUT
Compact (4mm × 6mm × 0.75mm) 38-Pin QFN
Package
The LTC3586/LTC3586-1 are available in a low profile
(0.75mm) 38-pin 4mm × 6mm QFN package.
APPLICATIONS
, 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.
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Digital Still Cameras
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HDD-Based MP3 Players, PDAs, GPS, PMPs
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Other USB-Based Handheld Products
TYPICAL APPLICATION
High Efficiency PowerPath Manager, Dual Buck, Buck-Boost and Boost
USB/WALL
4.5V TO 5.5V
TO OTHER
LOADS
Battery Charge Current vs
Battery Voltage (LTC3586)
USB COMPLIANT
STEP-DOWN
REGULATOR
700
600
500
400
300
200
100
0
CC/CV
BATTERY
CHARGER
BATTERY CHARGE CURRENT
0V
OPTIONAL
Li-Ion
CURRENT
CONTROL
EXTRA CURRENT
FOR FASTER CHARGING
CHARGE
+
500mA USB CURRENT LIMIT
T
LTC3586/LTC3586-1
3.3V/20mA
RTC/LOW
ALWAYS ON LDO
POWER LOGIC
0.8V TO 3.6V/400mA
0.8V TO 3.6V/400mA
4
2
1
2
3
DUAL HIGH EFFICIENCY
MEMORY/
CORE μP
EN
MODE
BUCKS
V
= 5V
BUS
5x MODE
HIGH EFFICIENCY
BUCK-BOOST
BATTERY CHARGER PROGRAMMED FOR 1A
2.5V to 3.3V/1A
5V/800mA
I/O
SYSTEM
2.8
3.2 3.4 3.6
3.8
4
4.2
3
I
LIM
BATTERY VOLTAGE (V)
HIGH EFFICIENCY
BOOST
AUDIO/
MOTOR
3586 TA01b
4
FAULT
3586 TA01
3586fa
1