LTC3589_15 datasheet, PDF - EEWORLD Datasheet

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LTC3589_15: Description8-Output Regulator with Sequencing and I2C; File Size669KB，50 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html

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8-Output Regulator with Sequencing and I2C

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LTC3589/LTC3589-1/

LTC3589-2

8-Output Regulator with

Sequencing and I

FeaTures

DescripTion

The

LTC

3589

is a complete power management solu-

tion for ARM and ARM-based processors and advanced

portable microprocessor systems. The device contains

three step-down DC/DC converters for core, memory and

SoC rails, a buck-boost regulator for I/O at 1.8V to 5V and

three 250mA LDO regulators for low noise analog sup-

plies. An I

C serial port is used to control enables, output

voltage levels, dynamic voltage scaling, operating modes

and status reporting. Differences between the LTC3589,

LTC3589-1, and LTC3589-2 are summarized in Table 1.

Regulator start-up is sequenced by connecting outputs to

enable pins in the desired order or programmed via the

C port. System power-on, power-off, and reset functions

are controlled by pushbutton interface, pin inputs, or I

interface.

The LTC3589 supports i.MX53/51, PXA and OMAP pro-

cessors with eight independent rails at appropriate power

levels. Other features include interface signals such as

the VSTB pin that simultaneously toggle up to four rails

between programmed run and standby output voltages.

The device is available in a low profile 40-pin 6mm

6mm

exposed pad QFN package.

LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks

of Linear Technology Corporation. All other trademarks are the property of their respective owners.

Triple I

C Adjustable High Efficiency Step-Down DC/

DC Converters: 1.6A, 1A/1.2A, 1A/1.2A

High Efficiency 1.2A Buck-Boost DC/DC Converter

Triple 250mA LDO Regulators

Pushbutton ON/OFF Control with System Reset

Flexible Pin-Strap Sequencing Operation

C and Independent Enable Control Pins

Power Good and Reset Outputs

Dynamic Voltage Scaling and Slew Rate Control

Selectable 2.25MHz or 1.12MHz Switching Frequency

Always-Alive 25mA LDO Regulator

8µA Standby Current

40-Pin 6mm

6mm

0.75mm QFN

Handheld Instruments and Scanners

Portable Industrial Devices

Automotive Infotainment

Medical Devices

High End Consumer Devices

Multirail Systems

Supports Freescale i.MX53/51, Marvell PXA and

Other Application Processors

applicaTions

Typical applicaTion

2.7V TO 5.5V

0.8V TO V

AT 25mA

VIN

1µH

SW1

22µF

LDO2

1µF

LDO3

1µF

LDO4

ENABLES

PWR_ON

GND

SW4AB

SW4CD

BB_OUT

WAKE

STATUS

3589 TA01a

Start-Up Sequence

LDO1_STBY

0.5V TO V

AT 1.6A

0.5V TO V

AT 1A

0.5V/DIV

WAKE

(1V/DIV)

SW2

LDO3

SW3

LDO2

SW1

500µs/DIV

1.8V TO 5V

22µF

3589 TA01b

1µF

SW2

LTC3589

1.5µH

SW3

1.5µH

BB_OUT

0.36V TO V

AT 250mA

1.8V

AT 250mA

2.8V

AT 250mA

22µF

0.5V TO V

AT 1A

22µF

1µF

2.7µH

3589fg

For more information

www.linear.com/LTC3589

LTC3589/LTC3589-1/

LTC3589-2

Table oF conTenTs

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

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

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

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

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

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

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

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

Typical Performance Characteristics .......................................................................................... 9

Pin Functions .....................................................................................................................13

Block Diagram....................................................................................................................15

Operation..........................................................................................................................16

Introduction .......................................................................................................................................................... 16

LTC3589, LTC3589-1, and LTC3589-2 Functional Comparison ............................................................................. 17

Always-On LDO..................................................................................................................................................... 17

Step-Down Switching Regulators ......................................................................................................................... 20

Buck-Boost Switching Regulator .......................................................................................................................... 24

Slewing DAC Reference Operation ........................................................................................................................ 28

Pushbutton Operation ........................................................................................................................................... 29

Enable and Power-On Sequencing ........................................................................................................................ 31

Fault Detection, Shutdown, and Reporting............................................................................................................ 32

C Operation ........................................................................................................................................................ 36

Thermal Considerations and Board Layout ........................................................................................................... 42

Typical Application ..............................................................................................................46

Package Description ............................................................................................................48

Revision History .................................................................................................................49

Typical Application ..............................................................................................................50

Related Parts .....................................................................................................................50

3589fg

For more information

www.linear.com/LTC3589

LTC3589_15 Related Products

	LTC3589_15	LTC3589-1_15	LTC3589-2_15
Description	8-Output Regulator with Sequencing and I2C	8-Output Regulator with Sequencing and I2C	8-Output Regulator with Sequencing and I2C

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