Datasheet > LT3686A

LT3686A

更新时间： 2023-12-20 18:45:33

品牌	Logo	应用领域
亚德诺 - ADI		稳压器
页数	文件大小	规格书
30页	509K
描述
采用 3mm x 3mm DFN 和 MSE 封装的 37V/1.2A 降压型稳压器

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LT3686A 数据手册

LT3686A

37V/1.2A Step-Down

Regulator in 3mm × 3mm DFN

and MSE

FeAtures

Description

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

converter with an internal power switch. The wide input

range of 3.6V to 37V makes the LT3686A suitable for

regulatingpowerfromawidevarietyofsources, including

24V industrial supplies and automotive batteries. Its high

maximum frequency allows the use of tiny inductors and

capacitors, resulting in a very small solution. Operating

frequencyabovetheAMbandavoidsinterferingwithradio

reception, making the LT3686A particularly suitable for

automotive applications.

■

Wide Input Range:

Operation from 3.6V to 37V

Overvoltage Lockout Protects Circuit Through

60V 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

Can Be Synchronized to External Clock

Tracking and Soft-Start

Cycle-by-cycle current limit, thermal shutdown and DA

current sense provide protection against fault conditions.

Soft-start and frequency foldback eliminate input current

surgeduringstart-up.Anoptionalinternalregulatedactive

load at the output via the BD pin keeps the LT3686A at

full switching frequency at light loads, resulting in low,

predictable output ripple above the audio and AM bands.

Internal compensation and an internal boost diode reduce

external component count.

Precision UVLO

Short-Circuit Robust

I in Shutdown <1µA

Internally Compensated

Thermally Enhanced MSOP and 3mm × 3mm DFN

Packages

ApplicAtions

■

Automotive Systems

The LT3686A offers external synchronization capability,

whereas the LT3686 does not.

L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode 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 (2MHz)

6V TO 37V

3.3V

OUT

2.2µF

EN/UVLO

BOOST

0.22µF

6.8µH

OUT

2MHz

LT3686A

3.3V

1.2A

SYNC/MODE

OUT

MBRM140

31.6k

10nF

GND

10k

22µF

31.6k

3686A TA01a

400

600

800 1000 1200

LOAD CURRENT (mA)

200

(V 6V TO 16V AT 2MHz)

3686A TA01b

3686afa

12 3 4 5 6 7...30

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与LT3686A相关器件

型号	品牌	描述	获取价格	数据表
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
LT3686AIDD#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