Datasheet > LT3686

LT3686

更新时间： 2023-12-20 18:44:01

品牌	Logo	应用领域
亚德诺 - ADI		稳压器
页数	文件大小	规格书
28页	514K
描述
采用 3mm x 3mm DFN 封装的 37V/1.2A 降压型稳压器

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LT3686 数据手册

LT3686

37V/1.2A Step-Down

Regulator in 3mm × 3mm DFN

FeAtures

Description

The LT^®3686 is a current mode PWM step-down DC/DC

converter with an internal 1.2A power switch, packaged in

10-lead 3mm × 3mm DFN. The wide input range of 3.6V to

37V makes the LT3686 suitable for regulating power from

awidevarietyofsources,including24Vindustrialsupplies

and automotive batteries. Its high maximum frequency al-

lows the use of tiny inductors and capacitors, resulting in

a very small solution. Operating frequency above the AM

band avoids interfering with radio reception, making the

LT3686 particularly suitable for automotive applications.

Wide Input Range:

Operation from 3.6V to 37V

Overvoltage Lockout Protects Circuit Through

55V Transients

Low Minimum On-Time:

Converts 16V to 3.3V

1.2A Output Current

at 2MHz

OUT

Adjustable Frequency: 300kHz to 2.5MHz

Constant Switching Frequency at Light Loads

Tracking and Soft-Start

Precision UVLO

Cycle-by-cycle current limit and DA current sense provide

protectionagainstfaultconditions.Soft-startandfrequency

foldback eliminate input current surge during start-up. An

optional internal regulated active load at the output via

the BD pin keeps the LT3686 at full switching frequency

at light loads, resulting in low, predictable output ripple

abovetheaudioandAMbands.Internalcompensationand

an internal boost diode reduce external component count.

Short-Circuit Robust

I in Shutdown <1µA

Internally Compensated

10-Lead 3mm × 3mm DFN Package

ApplicAtions

Automotive Systems

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.

Battery-Powered Equipment

Wall Transformer Regulation

Distributed Supply Regulation

typicAl ApplicAtion

3.3V Step-Down Converter

12V_INEfficiency (2.1MHz)

6V TO 37V

3.3V

OUT

2.2µF

EN/UVLO

BOOST

0.22µF

6.8µH

OUT

LT3686

GND

3.3V

1.2A

MODE

OUT

MBRM140

31.6k

10nF

10k

22µF

15.4k

3686 TA01a

400

600

800 1000 1200

LOAD CURRENT (mA)

200

(V 6V TO 16V AT 2.1MHz)

3686 TA01b

3686fc

12 3 4 5 6 7...28

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与LT3686相关器件

型号	品牌	描述	获取价格	数据表
LT3686A	ADI	采用 3mm x 3mm DFN 和 MSE 封装的 37V/1.2A 降压型稳压器	获取价格
LT3686AEDD#PBF	Linear	LT3686A - 37V/1.2A Step-Down Regulator in 3mm x 3mm DFN and MSE; Package: DFN; Pins: 10; T	获取价格
LT3686AEDD#TRPBF	Linear	LT3686A - 37V/1.2A Step-Down Regulator in 3mm x 3mm DFN and MSE; Package: DFN; Pins: 10; T	获取价格
LT3686AEMSE#TRPBF	Linear	LT3686A - 37V/1.2A Step-Down Regulator in 3mm x 3mm DFN and MSE; Package: MSOP; Pins: 12;	获取价格
LT3686AHMSE#PBF	Linear	暂无描述	获取价格
LT3686AHMSE#TRPBF	Linear	LT3686A - 37V/1.2A Step-Down Regulator in 3mm x 3mm DFN and MSE; Package: MSOP; Pins: 12;	获取价格