LT3689

更新时间： 2024-11-11 11:42:31

品牌	Logo	应用领域
凌特 - Linear		调节器
页数	文件大小	规格书
24页	293K
描述
36V 500mA Step-Down Regulator and 200mA LDO

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LT3689 数据手册

LT3645

36V 500mA Step-Down

Regulator and 200mA LDO

FEATURES

DESCRIPTION

TheLT^®3645isadualoutputregulatorcombininga500mA

buck regulator and a 200mA low dropout linear regula-

tor (LDO). The wide input voltage range of 3.6V to 36V

makes the LT3645 suitable for regulating power from a

wide variety of sources, including 24V industrial supplies

and automotive batteries. Its high operating frequency

allows the use of tiny, low cost inductors and capacitors,

resulting in a very small solution.

Wide Input Range:

Operation from 3.6V to 36V

Overvoltage Lockout Protects Circuit Through

55V Transients on Input

500mA Output Current Switching Regulator

High Switching Frequency: 750kHz

200mA Low Dropout Linear Regulator

1.2V to 16V Input; 0.8V to 8V Output

310mV Dropout Voltage V

to OUT2

CC2

Cycle-by-cycle current limit and frequency foldback pro-

vide protection against shorted outputs. Soft-start and

frequency foldback eliminate input current surge during

start-up.

Precision Programmable Undervoltage Lockout

Short-Circuit Robust

Internal Soft-Start

<2μA Shutdown Current

ThelinearregulatoroperatesfromtheV pinatvoltages

Small Thermally Enhanced 16-Lead (3mm × 3mm)

QFN and 12-Lead MSE Packages

CC2

down to 1.2V. It supplies 200mA of output current with a

typical dropout voltage of 310mV.

Other features of the LT3645 include a <2μA shutdown,

short circuit protection, soft-start and thermal shutdown.

The LT3645 is available in the thermally enhanced 16-lead

(3mm × 3mm) QFN package, or a 12-lead MSE package.

L, LT, LTC, LTM, Linear Technology, Burst Mode and the Linear logo are registered trademarks

of Linear Technology Corporation. All other trademarks are the property of their respective

owners.

APPLICATIONS

Automotive CMOS Image Sensors

Industrial/Automotive Micro-Controller Supply

TYPICAL APPLICATION

Buck Regulator Efﬁciency

3.3V/5V Step-Down Converter

0.1μF

= 5V

OUT

BOOST

15μH

6.2V TO 36V

300mA

1μF

LT3645

OUT

= 3.3V

52.3k

10k

10μF

ON OFF

EN/UVLO

NPG

EN2

PGOOD

CC2

= 12V

3.3V

200mA

OUT2

100

300

LOAD CURRENT (mA)

400

500

200

31.6k

10k

2.2μF

FB2

3645 TA01b

GND

3645 TA01a

3645f

12 3 4 5 6 7...24

中文翻译

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与LT3689相关器件

型号	品牌	获取价格	描述	数据表
LT3689-5	Linear	获取价格	700mA Step-Down Regulator with Power-On Reset and Watchdog Timer
LT3689EMSE-5#PBF	Linear	获取价格	LT3689/LT3689-5 - 700mA Step-Down Regulator with Power-On Reset and Watchdog Timer; Packag
LT3689EMSE-5-PBF	Linear	获取价格	700mA Step-Down Regulator with Power-On Reset and Watchdog Timer
LT3689EMSE-5-TRPBF	Linear	获取价格	700mA Step-Down Regulator with Power-On Reset and Watchdog Timer
LT3689EMSE-PBF	Linear	获取价格	700mA Step-Down Regulator with Power-On Reset and Watchdog Timer
LT3689EMSE-TRPBF	Linear	获取价格	700mA Step-Down Regulator with Power-On Reset and Watchdog Timer
LT3689EUD-5-PBF	Linear	获取价格	700mA Step-Down Regulator with Power-On Reset and Watchdog Timer
LT3689EUD-5-TRPBF	Linear	获取价格	700mA Step-Down Regulator with Power-On Reset and Watchdog Timer
LT3689EUD-PBF	Linear	获取价格	700mA Step-Down Regulator with Power-On Reset and Watchdog Timer
LT3689EUD-TRPBF	Linear	获取价格	700mA Step-Down Regulator with Power-On Reset and Watchdog Timer

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