Datasheet > LT8603

LT8603

更新时间： 2023-12-20 18:45:15

品牌	Logo	应用领域
亚德诺 - ADI		控制器转换器
页数	文件大小	规格书
38页	2916K
描述
42 V、低IQ、4通道输出、3路单芯片降压转换器和升压控制器

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LT8603 数据手册

LT8603

42V, Low I , Quad Output Triple Monolithic

Buck Converter and Boost Controller

FEATURES

DESCRIPTION

The LT^®8603 is a highly flexible, quad output regulator

combining two high input voltage capable monolithic

step-down switching regulators, one low input voltage

capable monolithic step-down regulator, and a boost

controller to satisfy a wide range of applications while

occupying minimal board space.

Flexible Power Supply System Capable of Four

Regulated Outputs with V

<< V

BATT

OUT

Two High Voltage Synchronous Buck Regulators

3V to 42V Input Voltage Range

Output Currents Up to 2.5A and 1.5A

One Low Voltage Synchronous Buck Regulator

2.6V to 5.5V Input Voltage Range

Output Currents Up to 1.8A

With the boost controller configured to supply the chip

V supply, the LT8603 produces three precisely regulated

One Boost Controller Allows Buck Converters to

outputs even when the boost input voltage falls signifi-

cantly below the regulated output voltages, such as dur-

ing an automotive cold crank scenario. Alternatively, with

the boost controller driven from one of the step-down

regulator outputs or configured as a SEPIC, the LT8603

provides four precisely regulated outputs over a wide

input voltage range.

Regulate with V

<< V

BATT

OUT

Selectable Burst Mode^®Operation Allows Low

28µA I with High Voltage Channels Active

Programmable Power-On Reset

Individual Channel Power Good Indicators

Step-Down Switching Frequency: 250kHz to 2.2MHz

Available in 40-Lead QFN (6mm × 6mm) Package

AEC-Q100 Qualified for Automotive Applications

The LT8603 provides robust regulation by including a

cycle-by-cycle current limit for all step-down regulators,

thermal shutdown, and a boost controller that can tolerate

reverse battery connections and negative transient input

voltages down to –42V.

APPLICATIONS

Automotive Stop-Start and Cold Crank Ride Through

Last-Gasp CPU Power Hold-Up

All registered trademarks and trademarks are the property of their respective owners.

Industrial Controls and Power Supplies

TYPICAL APPLICATION

Cold Crank Tolerant Automotive Triple Output Supply

LT8603 Response to a Cold Crank

Automotive Input Waveform

ꢋ

Bꢅꢄꢄ

ꢈꢉꢄꢊ

ꢍꢋ ꢄꢈ ꢊꢍꢋ

ꢕBꢈꢈꢖꢄ

ꢀꢋ ꢌꢈR

ꢍꢋ ꢎ ꢋ

ꢎ ꢀ.ꢏꢋ

Bꢅꢄꢄ

ꢖꢄꢅRꢄꢗꢉꢓ

ꢅBꢈꢋꢔ ꢊ.ꢃꢋꢘ

ꢔꢑꢛꢉꢋꢙꢈ

ꢋ

ꢚꢑ

ꢓꢋ

ꢓꢋ ꢚꢖꢓꢊ

ꢚꢑꢍ

ꢚꢖꢑꢊ

ꢚꢑꢆ

ꢀ

Bꢁꢂꢂ

ꢃꢄꢂꢅ

ꢐꢅꢄꢔꢊ

ꢚꢑꢄꢋ

ꢠꢠꢊ

ꢠꢠ

ꢌBꢊ

ꢌꢖꢔꢙꢊꢅ

ꢌꢖꢔꢙꢊB

Rꢄ

Bꢖꢄꢆ

ꢖꢝꢆ

ꢈꢉꢄꢆ

ꢏ ꢜ ꢆ.ꢏꢅ

ꢖꢡꢑꢠ

ꢀꢁꢂꢃꢄꢅꢆ

ꢇꢀꢈꢉꢊꢀ

ꢠꢓꢈR

ꢍ

ꢊ

ꢀ

ꢙꢄꢀꢁꢂꢃ

ꢌBꢆ

ꢃꢄꢂꢆ

ꢄRꢟꢖꢖꢆꢗꢍ

Bꢖꢄꢍ

ꢃꢄꢂꢇ

ꢓꢋ

ꢚꢑꢃ

ꢈꢉꢄꢍ

ꢃ.ꢃ ꢜ

ꢍ.ꢏꢅ ꢞ ꢚ

ꢖꢝꢍ

Rꢉꢑꢃ

Bꢚꢅꢖ

ꢀ

ꢓꢋꢚꢑꢃ

ꢃꢄꢂꢈ

ꢌBꢍ

ꢈꢉꢄꢍ

ꢀꢁ

ꢓꢐꢆꢗꢊ

ꢈꢉꢄꢃ

ꢆ.ꢍ ꢜ ꢆ.ꢀꢅ

ꢖꢝꢃ

ꢓꢈRꢔꢑ

ꢀꢁꢂꢃ ꢄꢅꢂꢆꢇ

ꢀꢁꢂꢃ ꢄꢅꢆꢇꢈꢉꢊꢁꢋꢌ

RESET

RST

ꢌBꢃ

ꢐꢑꢒ

ꢀꢁꢂꢃ ꢄꢅꢂꢆꢇ

Rev. B

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