LTC3577EUFF-3#TRPBF datasheet, PDF

Datasheet> All Categories > Power/power management> The power supply circuit> LTC3577EUFF-3#TRPBF

LTC3577EUFF-3#TRPBF: DescriptionIC PMIC PORTABLE 4.2V 44-QFN; CategoryPower/power management The power supply circuit; File Size2MB，52 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html; Environmental Compliance

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LTC3577EUFF-3#TRPBF Overview

IC PMIC PORTABLE 4.2V 44-QFN

LTC3577EUFF-3#TRPBF Parametric

Parameter Name	Attribute value
Brand Name	Linear Technology
Is it Rohs certified?	conform to
Parts packaging code	QFN
package instruction	HVQCCN, LCC44,.16X.28,16
Contacts	44
Manufacturer packaging code	UFF
Reach Compliance Code	compliant
ECCN code	EAR99
Adjustable threshold	YES
Analog Integrated Circuits - Other Types	POWER SUPPLY MANAGEMENT CIRCUIT
JESD-30 code	R-PQCC-N44
JESD-609 code	e3
length	7 mm
Humidity sensitivity level	1
Number of channels	1
Number of functions	1
Number of terminals	44
Maximum operating temperature	85 °C
Minimum operating temperature
Package body material	PLASTIC/EPOXY
encapsulated code	HVQCCN
Encapsulate equivalent code	LCC44,.16X.28,16
Package shape	RECTANGULAR
Package form	CHIP CARRIER
Peak Reflow Temperature (Celsius)	NOT SPECIFIED
power supply	5 V
Certification status	Not Qualified
Maximum seat height	0.8 mm
Maximum supply current (Isup)	1000 mA
Maximum supply voltage (Vsup)	5.5 V
Minimum supply voltage (Vsup)	2.7 V
Nominal supply voltage (Vsup)	3.3 V
surface mount	YES
technology	CMOS
Temperature level	OTHER
Terminal surface	Matte Tin (Sn)
Terminal form	NO LEAD
Terminal pitch	0.4 mm
Terminal location	QUAD
Maximum time at peak reflow temperature	NOT SPECIFIED
width	4 mm
Base Number Matches	1

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FeaTures

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

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.

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.

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

)

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

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

PNDs, DMB/DVB-H, Digital/Satellite Radio,

Media Players

Portable Industrial/Medical Products

Other USB-Based Handheld Products

Typical applicaTion

ADAPTER

USB

OVERVOLTAGE

PROTECTION

CHARGE

OPTIONAL

LED Driver Efficiency (10 LEDs)

100mA/500mA

1000mA

OUT

EFFICIENCY (%)

CC/CV

CHARGER

LTC3577-3/LTC3577-4

C PORT

NTC

0.001

0.01

0.1

LED CURRENT (mA)

100

MAX PWM

CONSTANT

CURRENT

SINGLE CELL

Li-Ion

0.8V to 3.6V/150mA

4 TO 10 LED

BOOST

0.8V to 3.6V/800mA

0.8V to 3.6V/500mA

DUAL LDO

REGULATORS

LED BACKLIGHT WITH DIGITALLY

CONTROLLED DIMMING

PUSHBUTTON

CONTROL

TRIPLE HIGH

EFFICIENCY

STEP-DOWN

SWITCHING

REGULATORS

357734 TA01a

357734 TA01b

357734fc

For more information

www.linear.com/LTC3577-3

LTC3577-3/LTC3577-4

Table oF conTenTs

Features ............................................................................................................................ 1

Applications ....................................................................................................................... 1

Typical Application ............................................................................................................... 1

Description......................................................................................................................... 1

Absolute Maximum Ratings ..................................................................................................... 3

Order Information ................................................................................................................. 3

Pin Configuration ................................................................................................................. 3

Electrical Characteristics ........................................................................................................ 4

Typical Performance Characteristics .........................................................................................10

Pin Functions .....................................................................................................................16

Block Diagram....................................................................................................................19

Operation..........................................................................................................................20

PowerPath OPERATION ........................................................................................................................................ 20

Low Dropout Linear Regulator Operation ............................................................................................................. 28

Step-Down Switching Regulator Operation........................................................................................................... 29

LED Backlight/Boost Operation ............................................................................................................................. 33

C Operation ........................................................................................................................................................ 37

Pushbutton Interface Operation ............................................................................................................................ 42

Layout and Thermal Considerations ..................................................................................................................... 46

Typical Applications .............................................................................................................48

Package Description ............................................................................................................50

Revision History .................................................................................................................51

Related Parts .....................................................................................................................52

357734fc

For more information

www.linear.com/LTC3577-3

LTC3577EUFF-3#TRPBF Related Products

	LTC3577EUFF-3#TRPBF	LTC3577EUFF-4#TRPBF	LTC3577EUFF-3#PBF	LTC3577EUFF-4#PBF
Description	IC PMIC PORTABLE 4.2V 44-QFN	IC PWR MANAGEMENT HANDHELD 44QFN	IC PMIC PORTABLE 5.5V 44-QFN	IC PWR MANAGEMENT HANDHELD 44QFN
Brand Name	Linear Technology	Linear Technology	Linear Technology	Linear Technology
Is it Rohs certified?	conform to	conform to	conform to	conform to
Parts packaging code	QFN	QFN	QFN	QFN
package instruction	HVQCCN, LCC44,.16X.28,16	HVQCCN, LCC44,.16X.28,16	HVQCCN, LCC44,.16X.28,16	HVQCCN, LCC44,.16X.28,16
Contacts	44	44	44	44
Manufacturer packaging code	UFF	UFF	UFF	UFF
Reach Compliance Code	compliant	compliant	compliant	compliant
ECCN code	EAR99	EAR99	EAR99	EAR99
Adjustable threshold	YES	YES	YES	YES
Analog Integrated Circuits - Other Types	POWER SUPPLY MANAGEMENT CIRCUIT	POWER SUPPLY MANAGEMENT CIRCUIT	POWER SUPPLY MANAGEMENT CIRCUIT	POWER SUPPLY MANAGEMENT CIRCUIT
JESD-30 code	R-PQCC-N44	R-PQCC-N44	R-PQCC-N44	R-PQCC-N44
JESD-609 code	e3	e3	e3	e3
length	7 mm	7 mm	7 mm	7 mm
Humidity sensitivity level	1	1	1	1
Number of channels	1	1	1	1
Number of functions	1	1	1	1
Number of terminals	44	44	44	44
Maximum operating temperature	85 °C	85 °C	85 °C	85 °C
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	HVQCCN	HVQCCN	HVQCCN	HVQCCN
Encapsulate equivalent code	LCC44,.16X.28,16	LCC44,.16X.28,16	LCC44,.16X.28,16	LCC44,.16X.28,16
Package shape	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	CHIP CARRIER	CHIP CARRIER	CHIP CARRIER	CHIP CARRIER
Peak Reflow Temperature (Celsius)	NOT SPECIFIED	NOT SPECIFIED	260	260
power supply	5 V	5 V	5 V	5 V
Certification status	Not Qualified	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	0.8 mm	0.8 mm	0.8 mm	0.8 mm
Maximum supply current (Isup)	1000 mA	1000 mA	1000 mA	1000 mA
Maximum supply voltage (Vsup)	5.5 V	5.5 V	5.5 V	5.5 V
Minimum supply voltage (Vsup)	2.7 V	2.7 V	2.7 V	2.7 V
Nominal supply voltage (Vsup)	3.3 V	3.3 V	3.3 V	3.3 V
surface mount	YES	YES	YES	YES
technology	CMOS	CMOS	CMOS	CMOS
Temperature level	OTHER	OTHER	OTHER	OTHER
Terminal surface	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)
Terminal form	NO LEAD	NO LEAD	NO LEAD	NO LEAD
Terminal pitch	0.4 mm	0.4 mm	0.4 mm	0.4 mm
Terminal location	QUAD	QUAD	QUAD	QUAD
Maximum time at peak reflow temperature	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED
width	4 mm	4 mm	4 mm	4 mm

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