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LTC3586-3 PDF预览

LTC3586-3

更新时间: 2024-02-27 00:34:44
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Linear Systems /
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36页 688K
描述
High Efficiency USB Power Manager with Boost

LTC3586-3 数据手册

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LTC3586-2/LTC3586-3  
High Efficiency USB Power  
Manager with Boost,  
Buck-Boost and Dual Bucks  
DESCRIPTION  
FEATURES  
Power Manager  
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-  
rentlimitedswitchingPowerPathmanagerwithautomatic  
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.  
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  
Unlikelinearchargers,theLTC3586-2/LTC3586-3switching  
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.  
from BAT  
DC/DCs  
n
Dual High Efficiency Buck DC/DCs (400mA I  
)
OUT  
)
n
n
n
n
High Efficiency Buck-Boost DC/DC (1A I  
OUT  
High Efficiency Boost DC/DC (800mA I  
DC/DC FAULT Output  
Compact (4mm × 6mm) 38-Pin QFN Package  
)
OUT  
The LTC3586-2/LTC3586-3 are available in a low profile  
(0.75mm) 38-pin 4mm × 6mm QFN package.  
APPLICATIONS  
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.  
n
Portable Medical/Industrial Devices  
n
Other USB-Based Handheld Products  
TYPICAL APPLICATION  
High Efficiency PowerPath Manager, Dual Buck, Buck-Boost and Boost  
Battery Charge Current vs  
Battery Voltage (LTC3586-2)  
USB/WALL  
TO OTHER  
LOADS  
USB COMPLIANT  
STEP-DOWN  
4.5V TO 5.5V  
REGULATOR  
700  
BATTERY CHARGE CURRENT  
CC/CV  
BATTERY  
CHARGER  
0V  
OPTIONAL  
Li-Ion  
CURRENT  
CONTROL  
600  
500  
400  
300  
200  
100  
0
EXTRA CURRENT  
FOR FASTER CHARGING  
500mA USB CURRENT LIMIT  
CHARGE  
+
T
LTC3586-2/LTC3586-3  
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
BATTERY VOLTAGE (V)  
I
LIM  
358623 TA01b  
HIGH EFFICIENCY  
BOOST  
AUDIO/  
MOTOR  
4
FAULT  
358623 TA01  
358623f  
1

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