Datasheet > LT3990

LT3990

更新时间： 2023-12-20 18:45:45

品牌	Logo	应用领域
亚德诺 - ADI		二极管稳压器
页数	文件大小	规格书
22页	701K
描述
具 2.5μA 静态电流和集成二极管的 62V、350mA 降压型稳压器

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中文翻译

获取价格

数据手册

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LT3990 数据手册

LT3990/LT3990-3.3/LT3990-5

62V, 350mA Step-Down

Regulator with 2.5µA

Quiescent Current and

Integrated Diodes

FEATURES

DESCRIPTION

Low Ripple Burst Mode^®Operation

The LT^®3990 is an adjustable frequency monolithic buck

switching regulator that accepts a wide input voltage

range up to 62V, and consumes only 2.5µA of quiescent

current. A high efﬁciency switch is included on the die

along with the catch diode, boost diode, and the neces-

saryoscillator, controlandlogiccircuitry. LowrippleBurst

Mode operation maintains high efﬁciency at low output

currents while keeping the output ripple below 5mV in a

typical application. Current mode topology is used for fast

transient response and good loop stability. A catch diode

current limit provides protection against shorted outputs

and overvoltage conditions. An accurate programmable

undervoltage lockout feature is available, producing a low

shutdowncurrentof0.7µA.Apowergoodﬂagsignalswhen

2.5µA I at 12V to 3.3V

OUT

Output Ripple < 5mV

P-P

Wide Input Voltage Range: 4.2V to 62V Operating

Adjustable Switching Frequency: 200kHz to 2.2MHz

Integrated Boost and Catch Diodes

350mA Output Current

Fixed Output Voltages: 3.3V, 5V

2µA I at 12V

Accurate Programmable Undervoltage Lockout

FMEA Fault Tolerant (MSOP Package)

OutputStaysatorBelowRegulationVoltageDuring

Adjacent Pin Short or When a Pin is Left Floating

Low Shutdown Current: I = 0.7µA

Internal Sense Limits Catch Diode Current

Power Good Flag

Small, Thermally Enhanced 16-Pin MSOP

and (3mm × 3mm) DFN Packages

AEC-Q100 Qualiﬁed for Automotive Applications

reaches90%oftheprogrammedoutputvoltage.The

OUT

LT3990 is available in small, thermally enhanced 16-pin

MSOP and 3mm × 3mm DFN packages.

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.

APPLICATIONS

Automotive Battery Regulation

Power for Portable Products

Industrial Supplies

TYPICAL APPLICATION

Power Loss

ꢎ000

ꢒ

ꢔ ꢎꢕꢒ

ꢓꢈ

5V Step-Down Converter

ꢎ00

ꢎ0

ꢀ

ꢁꢂ

ꢕꢑꢉꢀ ꢆꢄ ꢕꢒꢀ

0ꢑꢒꢒꢓꢔ

33ꢓꢝ

ꢀ

ꢃꢄꢄꢅꢆ

ꢇꢆ3990ꢈꢉ

ꢋꢂꢌꢍꢀꢇꢄ ꢅꢊ

ꢁꢂ

ꢀ

ꢄꢍꢆ

ꢉꢀ

ꢄꢔꢔ ꢄꢂ

ꢎ

3ꢉ0ꢖꢗ

ꢎꢏ

ꢃꢟ

0ꢍꢎ

ꢐꢆ

ꢀ

ꢄꢍꢆ

ꢒꢒꢓꢔ

ꢒꢑꢒꢓꢔ

ꢏꢂꢟ

3ꢘꢙꢚ

ꢛ ꢜ ꢙ00ꢚꢝꢞ

0ꢍ0ꢎ

3990 ꢆꢗ0ꢠꢡ

0ꢍ00ꢎ 0ꢍ0ꢎ

0ꢍꢎ

ꢎ

ꢎ0

ꢎ00

ꢀꢁꢂꢃ ꢄꢅꢆꢆꢇꢈꢉ ꢊꢋꢂꢌ

3990 ꢉꢂ0ꢎb

3990b

12 3 4 5 6 7...22

中文翻译

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与LT3990相关器件

型号	品牌	获取价格	描述	数据表
LT3990_15	Linear	获取价格	62V, 350mA Step-Down Regulator with 2.5A Quiescent Current and Integrated Diodes
LT3990-3.3_15	Linear	获取价格	62V, 350mA Step-Down Regulator with 2.5A Quiescent Current and Integrated Diodes
LT3990-5_15	Linear	获取价格	62V, 350mA Step-Down Regulator with 2.5A Quiescent Current and Integrated Diodes
LT3990EDD#TRPBF	Linear	获取价格	LT3990 - 62V, 350mA Step-Down Regulator with 2.5µA Quiescent Current and Integrat
LT3990EDDB	Linear	获取价格	60V, 350mA Step-Down Regulator with 2.5μA Qui
LT3990EDDB#PBF	Linear	获取价格	IC 0.865 A SWITCHING REGULATOR, 2640 kHz SWITCHING FREQ-MAX, PDSO10, 3 X 2 MM, LEAD FREE,
LT3990EDDB#TRPBF	Linear	获取价格	IC 0.865 A SWITCHING REGULATOR, 2640 kHz SWITCHING FREQ-MAX, PDSO10, 3 X 2 MM, LEAD FREE,
LT3990EDDBPBF	Linear	获取价格	60V, 350mA Step-Down Regulator with 2.5μA Qui
LT3990EDDBTRPBF	Linear	获取价格	60V, 350mA Step-Down Regulator with 2.5μA Qui
LT3990EMS	Linear	获取价格	60V, 350mA Step-Down Regulator with 2.5μA Qui

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