Power Manager. LTC3576 Datasheet

LTC3576 Manager. Datasheet pdf. Equivalent

Part LTC3576
Description Switching Power Manager
Feature www.DataSheet4U.com FEATURES n LTC3576/LTC3576-1 Switching Power Manager with USB On-the-Go + Trip.
Manufacture Linear Technology
Datasheet
Download LTC3576 Datasheet




LTC3576
www.DataSheet4U.com
LTC3576/LTC3576-1
FEATURES
Switching Power Manager
with USB On-the-Go + Triple
Step-Down DC/DCs
DESCRIPTION
n Bidirectional Switching Regulator with Bat-
Track™ Adaptive Output Control Provides Efficient
Charging and a 5V Output for USB On-The-Go
n Bat-Track Control of External High Voltage Step-
Down Switching Regulator
n Overvoltage Protection Guards Against Damage
n “Instant-On” Operation with Discharged Battery
n Triple Step-Down Switching Regulators with I2C
Adjustable Outputs (1A/400mA/400mA IOUT)
n 180mΩ Internal Ideal Diode + External Ideal Diode
Controller Powers the Load in Battery Mode
n Li-Ion/Polymer Battery Charger (1.5A Max ICHG)
n Battery Float Voltage: 4.2V (LTC3576), 4.1V (LTC3576-1)
n Compact (4mm × 6mm × 0.75mm) 38-pin QFN Package
APPLICATIONS
n HDD-Based Media Players
n GPS, PDAs, Digital Cameras, Smart Phones
n Automotive Compatible Portable Electronics
The LTC®3576/LTC3576-1 are highly integrated power
management and battery charger ICs for Li-Ion/Polymer
battery applications. They each include a high efficiency,
bidirectional switching PowerPath™ manager with auto-
matic load prioritization, a battery charger, an ideal diode, a
controller for an external high voltage switching regulator
and three general purpose step-down switching regulators
with I2C adjustable output voltages. The internal switch-
ing regulators automatically limit input current for USB
compatibility and can also generate 5V at 500mA for USB
on-the-go applications when powered from the battery.
Both the USB and external switching regulator power paths
feature Bat-Track optimized charging to provide maximum
power to the application from supplies as high as 38V. An
overvoltage circuit protects the LTC3576/LTC3576-1 from
damage due to high voltage on the VBUS or WALL pins with
just two external components. The LTC3576/LTC3576-1 are
available in a low profile 38-pin (4mm × 6mm × 0.75mm)
QFN package.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Bat-Track
and PowerPath 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
High Efficiency PowerPath Manager with Overvoltage Protection
and Triple Step-Down Regulator
AUTOMOTIVE
FIREWIRE, ETC.
LT3653
USB OR
5V AC
ADAPTER
CHARGE
OVERVOLTAGE
PROTECTION
EXTERNAL HIGH VOLTAGE
BUCK CONTROLLER
USB COMPLIANT
BIDIRECTIONAL
SWITCHING
REGULATOR
CC/CV
BATTERY
CHARGER
0V
LTC3576/LTC3576-1
TO OTHER
LOADS
OPTIONAL
+
T Li-Ion
ENABLE 6
CONTROLS
ALWAYS ON LDO
TRIPLE
HIGH EFFICIENCY
STEP-DOWN
SWITCHING
REGULATORS
1
2
3
I2C PORT
3.3V/20mA
0.8V TO 3.6V/400mA
0.8V TO 3.6V/400mA
0.8V TO 3.6V/1A
RST
2
RTC/LOW
POWER LOGIC
MEMORY
I/O
CORE
μPROCESSOR
I2C
3576 TA01
PowerPath Switching Regulator Efficiency
to System Load (PVOUT/PVBUS)
100
90
80
BAT = 4.2V
70
BAT = 3.3V
60
50
40
30
20 VBUS = 5V
10 IBAT = 0mA
10x MODE
0
10
100
LOAD CURRENT (mA)
1000
3576 TA01b
3576f
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LTC3576
wwwL.DTataCShe3et45U.c7om6/LTC3576-1
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2, 3)
VBUS, WALL (Transient) t < 1ms,
Duty Cycle < 1% .......................................... –0.3V to 7V
VBUS, WALL (Static), BAT, VIN1, VIN2, VIN3,
VOUT, ENOTG, NTC, SDA, SCL, DVCC,
RST3, CHRG ................................................ –0.3V to 6V
ILIM0, IILIM1 ......... –0.3V to Max(VBUS, VOUT, BAT) + 0.3V
EN1, EN2, EN3 ...............................–0.3V to VOUT + 0.3V
FBx (x = 1, 2, 3) ..............................–0.3V to VINx + 0.3V
IOVSENS...................................................................10mA
ICLPROG ....................................................................3mA
ICHRG, IRST3............................................................50mA
IPROG........................................................................2mA
ILDO3V3 ...................................................................30mA
ISW1, ISW2 (Continuous).......................................600mA
ISW, ISW3, IBAT, IVOUT (Continuous)..............................2A
Maximum Junction Temperature........................... 125°C
Operating Temperature Range.................. –40°C to 85°C
Storage Temperature Range................... –65°C to 125°C
PIN CONFIGURATION
TOP VIEW
CLPROG 1
LDO3V3 2
NTCBIAS 3
NTC 4
OVGATE 5
OVSENS 6
FB1 7
VIN1 8
SW1 9
EN1 10
ENOTG 11
DVCC 12
38 37 36 35 34 33 32
39
13 14 15 16 17 18 19
31 IDGATE
30 CHRG
29 PROG
28 ACPR
27 WALL
26 VC
25 FB2
24 VIN2
23 SW2
22 EN2
21 RST3
20 FB3
UFE PACKAGE
38-LEAD (4mm s 6mm) PLASTIC QFN
TJMAX = 125°C, θJA = 34°C/W
EXPOSED PAD (PIN 39) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3576EUFE#PBF
LTC3576EUFE#TRPBF 3576
38-Lead (4mm × 6mm) Plastic QFN
LTC3576EUFE-1#PBF
LTC3576EUFE-1#TRPBF 35761
38-Lead (4mm × 6mm) 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 l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VBUS = 5V, BAT = 3.8V, DVCC = 3.3V, RCLPROG = 3.01k, unless
otherwise noted.
SYMBOL
PARAMETER
PowerPath Switching Regulator—Step-Down Mode
VBUS Input Supply Voltage
IVBUS(LIM)
Total Input Current
IVBUSQ (Note 4) Input Quiescent Current
CONDITIONS
MIN
1× Mode
5× Mode
10× Mode
Low Power Suspend Mode
High Power Suspend Mode
1× Mode
5×, 10× Modes
Low/High Power Suspend Modes
4.35
l 82
l 440
l 800
l 0.32
l 1.6
TYP
90
472
880
0.39
2.05
7
17
0.045
MAX
5.5
100
500
1000
0.5
2.5
UNITS
V
mA
mA
mA
mA
mA
mA
mA
mA
3576f
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