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LTC3567EUF-TRPBF PDF预览

LTC3567EUF-TRPBF

更新时间： 2024-10-31 05:43:55
品牌 Logo 应用领域
凌特 - Linear 转换器
页数 文件大小 规格书
28页 274K
描述
High Effi ciency USB Power Manager Plus 1A Buck-Boost Converter with I2C Control

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中文翻译

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LTC3567EUF-TRPBF 数据手册

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LTC3567  
High Efficiency USB Power  
Manager Plus 1A Buck-Boost  
2
Converter with I C Control  
DESCRIPTION  
FEATURES  
The LTC®3567 is a highly integrated power management  
and battery charger IC for Li-Ion/Polymer battery applica-  
tions.Itincludesahighefficiencycurrentlimitedswitching  
PowerPath manager with automatic load prioritization,  
a battery charger, an ideal diode, and a high efficiency  
synchronous buck-boost switching regulator. Designed  
specifically for USB applications, the LTC3567’s switch-  
ing power manager automatically limits input current to  
a maximum of either 100mA or 500mA for USB or 1A for  
adapter-powered applications.  
Power Manager  
n
High Efficiency Switching PowerPath™ Controller  
with Bat-Track™ Adaptive Output Control  
n
Programmable USB or Wall Current Limit  
(100mA/500mA/1A)  
n
Full Featured Li-Ion/Polymer Battery Charger  
n
“Instant-On” Operation with a Discharged Battery  
n
1.5A Maximum Charge Current  
n
Internal 180mΩ Ideal Diode Plus External Ideal Diode  
Controller Powers Load in Battery Mode  
n
Low No-Load I When Powered from BAT (<30μA)  
Q
TheLTC3567’sswitchinginputstagetransmitsnearlyallof  
the 2.5W available from the USB port to the system load  
with minimal power wasted as heat. This feature allows  
the LTC3567 to provide more power to the application and  
eases thermal budgeting constraints in small spaces.  
1A Buck-Boost DC/DC  
n
High Efficiency (1A I  
)
OUT  
n
n
n
n
2.25MHz Constant Frequency Operation  
Low No-Load Quiescent Current (~13μA)  
Zero Shutdown Current  
The synchronous buck-boost DC/DC can provide up to  
1A output current.  
2
I C Control of All Functions  
The LTC3567 is available in a low profile 24-pin (4mm ×  
4mm × 0.75mm) QFN surface mount package.  
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. PowerPath  
and Bat-Track are a trademarks of Linear Technology Corporation. All other trademarks are the  
property of their respective owners. Protected by U.S. Patents including 6522118 and 6404251.  
APPLICATIONS  
n
HDD Based MP3 Players, PDA, GPS, PMP Products  
n
Other USB Based Handheld Products  
TYPICAL APPLICATION  
LTC3567 USB Power Manager with a 3.3V/1A Buck-Boost  
Switching Regulator Efficiency to  
FROM AC  
ADAPTER  
3.3μH  
System Load (POUT/PBUS  
)
V
=
OUT  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
V
SW  
V
OUT  
FROM USB  
BAT + 300mV  
BUS  
4.7μF  
10μF  
OTHER DC/DCs  
CLPROG  
PROG  
GATE  
BAT  
3.01k  
2k  
100k  
OPTIONAL  
BAT = 4.2V  
BAT = 3.3V  
0.1μF  
+
Li-Ion  
1μF  
3.3V/20mA  
ALWAYS  
ON LDO  
NTC  
LDO3V3  
V
IN1  
CHRG  
CHRGEN  
EN1  
100k  
LTC3567  
T
SWAB1  
DIGITAL  
CONTROL  
2.2μH  
1.5nF  
1μF  
V
I
= 5V  
BUS  
= 0mA  
SWCD1  
BAT  
3.3V/1A  
HDD  
10x MODE  
V
OUT1  
SCL  
0
2
324k  
0.01  
0.1  
(A)  
1
I C SERIAL  
INTERFACE  
SDA  
I
10μF  
OUT  
FB1  
3567 TA01b  
DV  
CC  
105k  
V
C1  
3567 TA01  
3567f  
1
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