LTC3576EUFE-1-PBF LINER [Linear Technology], LTC3576EUFE-1-PBF Datasheet
![no-image](/images/no-image-200.jpg)
LTC3576EUFE-1-PBF
Manufacturer Part Number
LTC3576EUFE-1-PBF
Description
Switching Power Manager with USB On-the-Go + Triple Step-Down DC/DCs
Manufacturer
LINER [Linear Technology]
Datasheet
1.LTC3576EUFE-1-PBF.pdf
(48 pages)
FEATURES
n
n
n
n
n
n
n
n
n
APPLICATIONS
n
n
n
TYPICAL APPLICATION
FIREWIRE, ETC.
AUTOMOTIVE
Bidirectional Switching Regulator with Bat-
Track™ Adaptive Output Control Provides Effi cient
Charging and a 5V Output for USB On-The-Go
Bat-Track Control of External High Voltage Step-
Down Switching Regulator
Overvoltage Protection Guards Against Damage
“Instant-On” Operation with Discharged Battery
Triple Step-Down Switching Regulators with I
Adjustable Outputs (1A/400mA/400mA I
180mΩ Internal Ideal Diode + External Ideal Diode
Controller Powers the Load in Battery Mode
Li-Ion/Polymer Battery Charger (1.5A Max I
Battery Float Voltage: 4.2V (LTC3576), 4.1V (LTC3576-1)
Compact (4mm × 6mm × 0.75mm) 38-pin QFN Package
HDD-Based Media Players
GPS, PDAs, Digital Cameras, Smart Phones
Automotive Compatible Portable Electronics
ADAPTER
USB OR
High Effi ciency PowerPath Manager with Overvoltage Protection
5V AC
CONTROLS
ENABLE
CHARGE
6
OVERVOLTAGE
LTC3576/LTC3576-1
PROTECTION
and Triple Step-Down Regulator
USB COMPLIANT
BIDIRECTIONAL
REGULATOR
SWITCHING
HIGH EFFICIENCY
REGULATORS
STEP-DOWN
SWITCHING
I
2
TRIPLE
EXTERNAL HIGH VOLTAGE
C PORT
CHARGER
BATTERY
BUCK CONTROLLER
CC/CV
LT3653
ALWAYS ON LDO
0V
1
2
3
OUT
CHG
)
T
2
C
)
+
0.8V TO 3.6V/400mA
0.8V TO 3.6V/400mA
0.8V TO 3.6V/1A
RST
2
OPTIONAL
3.3V/20mA
Li-Ion
TO OTHER
LOADS
with USB On-the-Go + Triple
DESCRIPTION
The LTC
management and battery charger ICs for Li-Ion/Polymer
battery applications. They each include a high effi ciency,
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 I
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 V
just two external components. The LTC3576/LTC3576-1 are
available in a low profi le 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.
Switching Power Manager
RTC/LOW
POWER LOGIC
MEMORY
μPROCESSOR
I/O
CORE
I
2
C
2
C adjustable output voltages. The internal switch-
3576 TA01
®
3576/LTC3576-1 are highly integrated power
Step-Down DC/DCs
LTC3576/LTC3576-1
PowerPath Switching Regulator Effi ciency
100
90
80
70
60
50
40
30
20
10
to System Load (P
0
10
V
I
10x MODE
BAT
BUS
BAT = 4.2V
= 0mA
= 5V
LOAD CURRENT (mA)
BAT = 3.3V
100
BUS
VOUT
or WALL pins with
/P
VBUS
3576 TA01b
1000
)
1
3576f