Datasheet > LT4363

LT4363

更新时间： 2024-11-11 11:45:15

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
24页	285K
描述
High Voltage Surge

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中文翻译

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LT4363 数据手册

LT4363

High Voltage Surge

Stopper with Current Limit

FEATURES

DESCRIPTION

TheLT^®4363surgestopperprotectsloadsfromhighvoltage

transients. It regulates the output during an overvoltage

event, such as load dump in vehicles, by controlling the

gateofanexternalN-channelMOSFET.Theoutputislimited

to a safe value allowing the loads to continue functioning.

The LT4363 also monitors the voltage drop between the

SNS and OUT pins to protect against overcurrent faults.

An internal amplifier limits the voltage across the current

sense resistor to 50mV. In either fault condition, a timer is

startedinverselyproportionaltoMOSFETstress.Beforethe

timer expires, the FLT pin pulls low to warn of an impend-

ing power down. If the condition persists, the MOSFET is

turned off. The LT4363-1 remains off until reset whereas

the LT4363-2 restarts after a cool down period.

Withstands Surges Over 80V with V Clamp

Wide Operating Voltage Range: 4V to 80V

Adjustable Output Clamp Voltage

Fast Overcurrent Limit: Less Than 5µs

Reverse Input Protection to –60V

Adjustable UV/OV Comparator Thresholds

Low 7µA Shutdown Current

Shutdown Pin Withstands –60V to 100V

Adjustable Fault Timer

Controls N-Channel MOSFET

Less Than 1% Retry Duty Cycle During Faults,

LT4363-2

Available in 12-Pin (4mm × 3mm) DFN, 12-Pin

MSOP or 16-Pin SO Packages

Two precision comparators can monitor the input supply

for overvoltage (OV) and undervoltage (UV) conditions.

When the potential is below the UV threshold, the external

MOSFETiskeptoff. Iftheinputsupplyvoltageisabovethe

OV threshold, the MOSFET is not allowed to turn back on.

Back-to-back MOSFETs can be used in lieu of a Schottky

diode for reverse input protection, reducing voltage drop

and power loss. A shutdown pin reduces the quiescent

current to less than 7µA during shutdown.

APPLICATIONS

Automotive/Avionic Surge Protection

Hot Swap™/Live Insertion

High Side Switch for Battery Powered Systems

Intrinsic Safety Applications

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

No R

, ThinSOT and Hot Swap are trademarks of Linear Technology Corporation. All other

SENSE

trademarks are the property of their respective owners.

TYPICAL APPLICATION

4A, 12V Overvoltage Output Regulator with 150V Surge Protection

Overvoltage Protector Regulates

Output at 27V During Transient

10mΩ

FDB33N25

OUTPUT

CLAMP

AT 16V

12V

= 6.8µF

= 500mA

80V INPUT SURGE

TMR

22µF

LOAD

10Ω

57.6k

4.99k

0.1µF

GATE SNS

OUT

20V/DIV

127k

SMAJ58A

SHDN

12V

27V ADJUSTABLE CLAMP

100ms/DIV

DC/DC

LT4363-2

CONVERTER

OUT

20V/DIV

49.9k

ENOUT

SHDN

GND

FLT

FAULT

4363 TA01b

GND

TMR

4363 TA01

0.1µF

4363fa

12 3 4 5 6 7...24

中文翻译

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与LT4363相关器件

型号	品牌	获取价格	描述	数据表
LT4363-1	Linear	获取价格	Ideal Diode Controller with Reverse Input Protection
LT4363-2	Linear	获取价格	Ideal Diode Controller with Reverse Input Protection
LT4363MPS-1#PBF	Linear	获取价格	LT4363 - High Voltage Surge Stopper with Current Limit; Package: SO; Pins: 16; Temperature
LT4411	ETC	获取价格	UNDERSTANDING THE SUBJECT IS CUSTOMER SERVICE
LT4412	ETC	获取价格	UNDERSTANDING THE SUBJECT IS CUSTOMER SERVICE
LT4413	ETC	获取价格	UNDERSTANDING THE SUBJECT IS CUSTOMER SERVICE
LT4414	ETC	获取价格	UNDERSTANDING THE SUBJECT IS CUSTOMER SERVICE
LT4430	Linear	获取价格	Secondary-Side Optocoupler Driver
LT4430	ADI	获取价格	副端光耦合器驱动器
LT4430_1	Linear	获取价格	Secondary-Side Opto-Coupler Driver Ground-Referenced Opto-Coupler Drive

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