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LTC3566 Datasheet

High Effi ciency 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 IQ when Powered from BAT (<30μA)
1A BUCK-BOOST DC/DC
High Efficiency (1A IOUT)
2.25MHz Constant Frequency Operation
Low No-Load Quiescent Current (~13μA)
Zero Shutdown Current
Pin Control of All Functions
APPLICATIONS
HDD Based MP3 Players, PDA, GPS, PMP Products
Other USB Based Handheld Products
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 VOUT 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.
TYPICAL APPLICATION
FROM AC
ADAPTER
FROM USB
LTC3566/LTC3566-2 USB Power Manager with 3.3V/1A Buck-Boost
3.3μH
4.7μF
100k
3.01k
0.1μF
2k
VBUS
CLPROG
PROG
SW
VOUT
GATE
BAT
T 100k
DIGITAL CONTROL
NTC
CHRG
CHRGEN
LTC3566/LTC3566-2
LDO3V3
VIN1
SWAB1
ILIM0
ILIM1
SWCD1
VOUT1
MODE
EN1
GND
EXPOSED PAD
FB1
VC1
3566 TA01
VOUT =
BAT + 300mV
10μF TO OTHER
DC/DCs
OPTIONAL
+
Li-Ion
1μF
3.3V/25mA
ALWAYS
ON LDO
2.2μH
1.3nF
324k
105k
1μF
3.3V/1A
HDD
10μF
Switching Regulator Efficiency to
System Load (POUT/PBUS)
100
90
80
70 BAT = 4.2V
60
BAT = 3.3V
50
40
30
20 VBUS = 5V
10 IBAT = 0mA
10x MODE
0
0.01
0.1
IOUT (A)
1
3566 TA01b
3566fb
1


Linear Technology Electronic Components Datasheet

LTC3566 Datasheet

High Effi ciency USB Power Manager Plus 1A Buck-Boost Converter

No Preview Available !

LTC3566/LTC3566-2
ABSOLUTE MAXIMUM RATINGS
(Note 1)
VBUS (Transient) t < 1ms,
Duty Cycle < 1% ...................................... –0.3V to 7V
VBUS (Static), VIN1, BAT, NTC, CHRG, MODE, ILIM0,
ILIM1, EN1, CHRGEN ................................ –0.3V to 6V
FB1, VC1.............. –0.3V to Lesser of 6V or (VIN1 + 0.3V)
ICLPROG ....................................................................3mA
ICHRG......................................................................50mA
IPROG........................................................................2mA
ILDO3V3 ...................................................................30mA
ISW, IBAT, IVOUT............................................................2A
IVOUT1, ISWAB1, ISWCD1 .............................................2.5A
Operating Temperature Range (Note 2).... –40°C to 85°C
Junction Temperature (Note 3) ............................. 125°C
Storage Temperature Range................... –65°C to 125°C
PIN CONFIGURATION
TOP VIEW
24 23 22 21 20 19
LDO3V3 1
CLPROG 2
NTC 3
FB1 4
VC1 5
GND 6
18 GATE
17 GND
16 CHRG
25
15 PROG
14 ILIM1
13 ILIM0
7 8 9 10 11 12
UF PACKAGE
24-LEAD (4mm × 4mm) PLASTIC QFN
TJMAX = 125°C, θJA = 37°C/W
EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3566EUF#PBF
LTC3566EUF#TRPBF
3566
24-Lead (4mm × 4mm) Plastic QFN
LTC3566EUF-2#PBF
LTC3566EUF-2#TRPBF 35662
24-Lead (4mm × 4mm) Plastic QFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 85°C
ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VBUS = 5V, VBAT = 3.8V, DVCC = 3.3V, RCLPROG = 3.01k, RPROG = 1k,
VIN1 = VOUT1 = 3.8V unless otherwise noted.
SYMBOL
PARAMETER
Power Path Switching Regulator
VBUS
IBUSLIM
Input Supply Voltage
Total Input Current
IBUSQ
VBUS Quiescent Current
hCLPROG
(Note 4)
Ratio of Measured VBUS Current to
CLPROG Program Current
CONDITIONS
1x Mode, VOUT = BAT
5x Mode, VOUT = BAT
10x Mode, VOUT = BAT
Suspend Mode, VOUT = BAT
1x Mode, IOUT = 0mA
5x Mode, IOUT = 0mA
10x Mode, IOUT = 0mA
Suspend Mode, IOUT = 0mA
1x Mode
5x Mode
10x Mode
Suspend Mode
MIN
4.35
87
436
800
0.31
TYP
95
460
860
0.38
7
15
15
0.044
224
1133
2140
11.3
MAX UNITS
5.5 V
100 mA
500 mA
1000 mA
0.50 mA
mA
mA
mA
mA
mA/mA
mA/mA
mA/mA
mA/mA
3566fb
2


Part Number LTC3566
Description High Effi ciency USB Power Manager Plus 1A Buck-Boost Converter
Maker Linear Technology
Total Page 28 Pages
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