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LTC3577EUFF-4#TRPBF

Description
Power Management IC 4.35V to 5.5V 44-Pin QFN EP T/R
File Size2MB,52 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric Compare View All

LTC3577EUFF-4#TRPBF Overview

Power Management IC 4.35V to 5.5V 44-Pin QFN EP T/R

LTC3577EUFF-4#TRPBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
HTS8542.39.00.01
FunctionPower Management IC
Switching Frequency (kHz)950 to 1300
Minimum Operating Supply Voltage (V)4.35
Maximum Operating Supply Voltage (V)5.5
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)85
Supplier Temperature GradeExtended
PackagingTape and Reel
Maximum Storage Temperature (°C)125
Minimum Storage Temperature (°C)-65
Standard Package NameQFN
Pin Count44
Supplier PackageQFN EP
MountingSurface Mount
Package Height0.75(Max)
Package Length7
Package Width4
PCB changed44
Lead ShapeNo Lead
FeaTures
n
n
LTC3577-3/LTC3577-4
Highly Integrated
Portable Product PMIC
DescripTion
The
LTC
®
3577-3/LTC3577-4
are highly integrated power
management ICs for single cell Li-Ion/Polymer battery ap-
plications. It includes a PowerPath manager with automatic
load prioritization, a battery charger, an ideal diode, input
overvoltage protection and numerous other internal pro-
tection features. The LTC3577-3/LTC3577-4 are designed
to accurately charge from current limited supplies such as
USB by automatically reducing charge current such that
the sum of the load current and the charge current does
not exceed the programmed input current limit (100mA
or 500mA modes). The LTC3577-3/LTC3577-4 reduce the
battery voltage at elevated temperatures to improve safety
and reliability. The three step-down switching regulators
and two LDOs provide a wide range of available supplies.
The LTC3577-3/LTC3577-4 also include a pushbutton
input to control power sequencing and system reset. The
onboard LED backlight boost circuitry can drive up to 10
series LEDs and includes versatile digital dimming via the
I
2
C input. The LTC3577-3/LTC3577-4 are designed to sup-
port the SiRF Atlas IV processor and has pushbutton timing
and sequencing different from other LTC3577 versions.
The LTC3577-3/LTC3577-4 are available in a low profile
4mm
×
7mm
×
0.75mm 44-pin QFN package.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Hot
Swap 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, 6700364,
7511390, 5481178, 6580258. Other patents pending.
n
n
n
n
n
n
n
n
n
n
Full Featured Li-Ion/Polymer Charger/PowerPath™
Controller with Instant-On Operation
Triple Adjustable High Efficiency Step-Down
Switching Regulators (800mA, 500mA, 500mA I
OUT
)
I
2
C Adjustable SW Slew Rates for EMI Reduction
High Temperature Battery Voltage Reduction
Improves Safety and Reliability
Overvoltage Protection Controller for USB (V
BUS
)/Wall
Inputs Provide Protection to 30V
Integrated 40V Series LED Back Light Driver with 60dB
Brightness Control and Gradation via I
2
C
1.5A Maximum Charge Current with Thermal Limiting
Battery Float Voltage: 4.2V (LTC3577-3)
4.1V (LTC3577-4)
Pushbutton ON/OFF Control with System Reset
Dual 150mA Current Limited LDOs
Start-Up Timing Compatible with SiRF Atlas IV
Processor
Small 4mm
×
7mm 44-Pin QFN Package
applicaTions
n
n
n
PNDs, DMB/DVB-H, Digital/Satellite Radio,
Media Players
Portable Industrial/Medical Products
Other USB-Based Handheld Products
Typical applicaTion
5V
ADAPTER
USB
OVERVOLTAGE
PROTECTION
CHARGE
2
OPTIONAL
LED Driver Efficiency (10 LEDs)
100mA/500mA
1000mA
V
OUT
0V
EFFICIENCY (%)
CC/CV
CHARGER
LTC3577-3/LTC3577-4
I
2
C PORT
NTC
90
80
70
60
50
40
30
20
10
0
0.001
0.01
0.1
1
LED CURRENT (mA)
10
100
MAX PWM
CONSTANT
CURRENT
+
SINGLE CELL
Li-Ion
0.8V to 3.6V/150mA
0.8V to 3.6V/150mA
4 TO 10 LED
BOOST
0.8V to 3.6V/800mA
0.8V to 3.6V/500mA
0.8V to 3.6V/500mA
DUAL LDO
REGULATORS
LED BACKLIGHT WITH DIGITALLY
CONTROLLED DIMMING
PUSHBUTTON
CONTROL
TRIPLE HIGH
EFFICIENCY
STEP-DOWN
SWITCHING
REGULATORS
PB
357734 TA01a
357734 TA01b
357734fc
For more information
www.linear.com/LTC3577-3
1

LTC3577EUFF-4#TRPBF Related Products

LTC3577EUFF-4#TRPBF LTC3577EUFF-3#PBF LTC3577EUFF-3#TRPBF LTC3577EUFF-4#PBF
Description Power Management IC 4.35V to 5.5V 44-Pin QFN EP T/R Power Management IC 4.35V to 5.5V 44-Pin QFN EP Tube Power Management IC 4.35V to 5.5V 44-Pin QFN EP T/R Power Management IC 4.35V to 5.5V 44-Pin QFN EP Tube
EU restricts the use of certain hazardous substances Compliant Compliant Compliant Compliant
ECCN (US) EAR99 EAR99 EAR99 EAR99
Part Status Active Active Active Active
HTS 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01
Function Power Management IC Power Management IC Power Management IC Power Management IC
Switching Frequency (kHz) 950 to 1300 950 to 1300 950 to 1300 950 to 1300
Minimum Operating Supply Voltage (V) 4.35 4.35 4.35 4.35
Maximum Operating Supply Voltage (V) 5.5 5.5 5.5 5.5
Minimum Operating Temperature (°C) -40 -40 -40 -40
Maximum Operating Temperature (°C) 85 85 85 85
Supplier Temperature Grade Extended Extended Extended Extended
Packaging Tape and Reel Tube Tape and Reel Tube
Maximum Storage Temperature (°C) 125 125 125 125
Minimum Storage Temperature (°C) -65 -65 -65 -65
Standard Package Name QFN QFN QFN QFN
Pin Count 44 44 44 44
Supplier Package QFN EP QFN EP QFN EP QFN EP
Mounting Surface Mount Surface Mount Surface Mount Surface Mount
Package Height 0.75(Max) 0.75(Max) 0.75(Max) 0.75(Max)
Package Length 7 7 7 7
Package Width 4 4 4 4
PCB changed 44 44 44 44
Lead Shape No Lead No Lead No Lead No Lead
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