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LTC3566_15

产品描述High Efficiency USB Power Manager Plus 1A Buck-Boost Converter
文件大小269KB,共28页
制造商Linear ( ADI )
官网地址http://www.analog.com/cn/index.html
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LTC3566_15概述

High Efficiency USB Power Manager Plus 1A Buck-Boost Converter

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FEATURES
POWER MANAGER
High Efficiency Switching PowerPath™ Controller
with Bat-Track™ Adaptive Output Control
Programmable USB or Wall Input Current Limit
(100mA/500mA/1A)
Full Featured Li-Ion/Polymer Battery Charger
Instant-On Operation with Discharged Battery
1.5A Maximum Charge Current
Internal 180mΩ Ideal Diode Plus External Ideal Diode
Controller Powers Load in Battery Mode
Low No-Load I when Powered from BAT (<30μA)
Q
1A BUCK-BOOST DC/DC
High Efficiency (1A I
OUT
)
2.25MHz Constant Frequency Operation
Low No-Load Quiescent Current (~13μA)
Zero Shutdown Current
Pin Control of All Functions
LTC3566/LTC3566-2
High Efficiency USB
Power Manager Plus 1A
Buck-Boost Converter
DESCRIPTION
The LTC
®
3566 family are highly integrated power manage-
ment and battery charger ICs for Li-Ion/Polymer battery
applications. They include a high efficiency current lim-
ited switching 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 LTC3566
family’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.
The LTC3566 family’s switching input stage transmits nearly
all of the 2.5W available from the USB port to the system
load with minimal power wasted as heat. This feature
allows the LTC3566 family to provide more power to the
application and eases the constraint of thermal budgeting in
small spaces. The LTC3566-2 automatically reduces charge
current to maintain a regulated 3.6V V
OUT
during low bat-
tery conditions; the LTC3566 does not. The synchronous
buck-boost DC/DC can provide up to 1A.
The LTC3566 family is available in a low profile 24-lead
4mm × 4mm QFN surface mount package.
L,
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.
APPLICATIONS
HDD Based MP3 Players, PDA, GPS, PMP Products
Other USB Based Handheld Products
TYPICAL APPLICATION
LTC3566/LTC3566-2 USB Power Manager with 3.3V/1A Buck-Boost
FROM AC
ADAPTER
FROM USB
4.7μF
100k
0.1μF
3.01k
2k
V
BUS
CLPROG
GATE
PROG
BAT
NTC
T 100k
CHRG
CHRGEN
ILIM0
DIGITAL CONTROL
ILIM1
MODE
EN1
GND
EXPOSED PAD
VC1
3566 TA01
3.3μH
V
OUT
=
BAT + 300mV
TO OTHER
DC/DCs
OPTIONAL
Switching Regulator Efficiency to
System Load (P
OUT
/P
BUS
)
100
90
80
EFFICIENCY (%)
70
60
50
40
30
20
10
V
BUS
= 5V
I
BAT
= 0mA
10x MODE
0.1
I
OUT
(A)
1
3566 TA01b
SW
V
OUT
10μF
BAT = 4.2V
BAT = 3.3V
+
Li-Ion
1μF
LTC3566/LTC3566-2
LDO3V3
V
IN1
SWAB1
2.2μH
SWCD1
V
OUT1
3.3V/25mA
ALWAYS
ON LDO
1μF
3.3V/1A
HDD
324k
10μF
FB1
1.3nF
105k
0
0.01
3566fb
1

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