Datasheet > LT1185

LT1185

更新时间： 2024-09-26 14:57:55

品牌	Logo	应用领域
亚德诺 - ADI		稳压器
页数	文件大小	规格书
16页	183K
描述
低压差稳压器

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中文翻译

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数据手册

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LT1185 数据手册

LT1185

Low Dropout Regulator

FEATURES

■

The LT1185 uses a saturation-limited NPN transistor as

the pass element. This device gives the linear dropout

characteristics of a FET pass element with significantly

lessdiearea.Highefficiencyismaintainedbyusingspecial

anti-saturation circuitry that adjusts base drive to track

load current. The “on resistance” is typically 0.25Ω.

Low Resistance Pass Transistor: 0.25

Ω

■

Dropout Voltage: 0.75V at 3A

■

1% Reference Voltage

Accurate Programmable Current Limit

Shutdown Capability

■

Internal Reference Available

Full Remote Sense

Accurate current limit is programmed with a single 1/8W

external resistor, with a range of zero to three amperes. A

second, fixed internal limit circuit prevents destructive

currents if the programming current is accidentally over-

ranged. Shutdown of the regulator output is guaranteed

when the program current is less than 1µA, allowing

external logic control of output voltage.

Low Quiescent Current: 2.5mA

Good High Frequency Ripple Rejection

Available in 5-Lead TO-220 and DD Packages

DESCRIPTIO

TheLT^®1185isa3Alowdropoutregulatorwithadjustable

currentlimitandremotesensecapability. Itcanbeusedas

a positive output regulator with floating input or as a

standard negative regulator with grounded input. The

outputvoltagerangeis2.5Vto25V,with±1%accuracyon

the internal reference voltage.

The LT1185 has all the protection features of previous

LTC regulators, including power limiting and thermal

shutdown.

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

TYPICAL APPLICATIO

Dropout Voltage

5V, 3A Regulator with 3.5A Current Limit

1.6

1.4

1.2

1.0

2µF

TANT

LIM

4.3k

2.37k

6V TO 16V

REF

GND

OUT

5V AT 3A

2µF

TANT

= 25°C

0.8

0.6

0.4

0.2

= 125°C

LT1185

2.67k

–

OUT

LT1185 • TA01

= –55°C

*CURRENT LIMIT = 15k/R

LIM

= 3.5A

LOAD CURRENT (A)

LT1185 • TA02

1185ff

12 3 4 5 6 7...16

中文翻译

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