LTC3577-3 datasheet(1/50 Pages) LINER

部品番号	LTC3577-3

部品情報	8-Output Regulator with Sequencing and I2C

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メーカー	LINER [Linear Technology]

ホームページ	http://www.linear.com

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LTC3589/LTC3589-1/

LTC3589-2

1

3589fe

TYPICAL APPLICATION

FEATURES

DESCRIPTION

APPLICATIONS

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 I2C 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

I2C port. System power-on, power-off, and reset functions

are controlled by pushbutton interface, pin inputs, or I2C

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.

Start-Up Sequence

n Triple I2C Adjustable High Efficiency Step-Down DC/

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

n High Efficiency 1.2A Buck-Boost DC/DC Converter

n Triple 250mA LDO Regulators

n Pushbutton ON/OFF Control with System Reset

n Flexible Pin-Strap Sequencing Operation

n I2C and Independent Enable Control Pins

n Power Good and Reset Outputs

n Dynamic Voltage Scaling and Slew Rate Control

n Selectable 2.25MHz or 1.12MHz Switching Frequency

n Always-Alive 25mA LDO Regulator

n 8μA Standby Current

n 40-Pin 6mm

× 6mm × 0.75mm QFN

n Handheld Instruments and Scanners

n Portable Industrial Devices

n Automotive Infotainment

n Medical Devices

n High End Consumer Devices

n Multirail Systems

n Supports Freescale i.MX53/51, Marvell PXA and

Other Application Processors

L, 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.

8-Output Regulator with

Sequencing and I2C

500μs/DIV

0.5V/DIV

3589 TA01b

BB_OUT

WAKE

(1V/DIV)

LDO2

SW3

SW1

SW2

LDO3

LDO1_STDBY

VIN 2.7V TO 5.5V

1μH

1μF

1.5μH

2.7μH

SW1

SW2

SW3

SW4CD

BB_OUT

SW4AB

LTC3589

0.8V TO VIN

AT 25mA

0.5V TO VIN

AT 1.6A

22μF

0.5V TO VIN

AT 1A

0.5V TO VIN

AT 1A

0.36V TO VIN

AT 250mA

1.8V

AT 250mA

2.8V

AT 250mA

3589 TA01a

VIN

LDO2

LDO3

LDO4

GND

I2C

ENABLES

PWR_ON

ON

3

4

7

STATUS

WAKE

1.8V TO 5V

同様の部品番号 - LTC3577-3

メーカー	部品番号	データシート	部品情報
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	LTC3577-3	567Kb / 52P	Highly Integrated Portable Product PMIC

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