Datasheet > LT8685S

LT8685S

更新时间： 2023-12-20 18:44:00

品牌	Logo	应用领域
亚德诺 - ADI		稳压器
页数	文件大小	规格书
24页	1890K
描述
42V 四通道、可联合、同步、单片式降压型稳压器

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数据手册

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LT8685S 数据手册

LT8685S

TYPICAL APPLICATION

Triple Output, 3MHz Step-Down Regulator with Sequenced Ratiometric Start-Up

EN/UVLO

BIAS

EN2

0.1µF

9V TO 42V

IN1

2.2µF

BST1

0.68µH**

0.1µF

LT8685S

OUT1

8V, 5A*

SW1

BST2

IN2

2.2µF

Startup Sequencing

0.1µF

2.2pF

953k

SW2

FB1

FB2

47µF

OUT1

IN3

IN4

INTV

105k

1µF

10V/DIV

BST3

0.47µH

0.1µF

499k

OUT3

3.3V, 4A

OUT1,2

5V/DIV

PG1

EN3

EN4

PG2

PG3

SW3

2.2pF

976k

OUT3

2V/DIV

499k

47µF

FB3

OUT4

2V/DIV

499k

261k

PG4

INTV

TRK/SS1

TRK/SS2

TRK/SS3

TRK/SS4

BST4

0.33µH

8685S TA05b

0.1µF

OUT4

2ms/DIV

SW4

1.8V, 4A

10nF

3.3pF

787k

1A LOAD PER OUTPUT

STARTUP SEQUENCE:

100µF

4.7µF

FB4

VIN HIGH ENABLES OUT1,2

SYNC/MODE GND RT

499k

IN REGULATION ENABLES OUT3 AND OUT4

OUT1,2

10nF

OUT3

AND V SOFT-START RATIOMETRICALLY

OUT4

13.7k

CLK IN

3MHz

*CURRENT AVAILABLE FROM OUT1:

5A – I – I – I

VIN3

VIN4 BIAS

**INDUCTOR VALUE CHOSEN FOR V = 12V

8685S TA05a

RELATED PARTS

PART NUMBER DESCRIPTION

COMMENTS

V : 3V to 42V, V

LT8601

LT8602

LT8603

42V, 94% Efficiency, 2.2MHz Triple Output (1.5A + 2.5A + 1.8A)

= 0.8V, I = 30µA, I < 25µA,

OUT(MIN) Q SD

Synchronous Micropower Step-Down DC/DC Converter with I = 30μA 6mm × 6mm QFN-40 Package

42V, Quad Output (2.5A + 1.5A + 1.5A + 1.5A) 95% Efficiency, 2.2MHz V : 3V to 42V, V

Synchronous Micropower Step-Down DC/DC Converter with I = 25µA 6mm × 6mm QFN-40 Package

= 0.8V, I = 25µA, I < 25µA,

Q SD

OUT(MIN)

42V, Low I , Quad Output Triple Monolithic Buck Converter and Boost

V : 3V to 42V, V

= 0.8V, I = 25µA, I < 25µA,

OUT(MIN) Q SD

Controller

6mm × 6mm QFN-40 Package

Rev. 0

06/22

www.analog.com

 ANALOG DEVICES, INC. 2022

For more information www.analog.com

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