LT3990

更新时间： 2024-09-17 05:43:35

品牌	Logo	应用领域
凌特 - Linear		稳压器二极管
页数	文件大小	规格书
20页	229K
描述
60V, 350mA Step-Down Regulator with 2.5μA Quiescent Current and Integrated Diodes

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LT3990 数据手册

Electrical Specifications Subject to Change

LT3990

60V, 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 60V, 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 enable pin with accurate

threshold is available, producing a low shutdown current

2.5μA I at 12V to 3.3V

OUT

Output Ripple < 5mV

P-P

Wide Input Voltage Range: 4.2V to 60V Operating

Adjustable Switching Frequency: 200kHz to 2.2MHz

Integrated Boost and Catch Diodes

350mA Output Current

Accurate 1V Enable Pin Threshold

Low Shutdown Current: I = 0.7μA

Internal Sense Limits Catch Diode Current

Power Good Flag

Output Voltage: 1.21V to 25V

Internal Compensation

Small 10-Pin MSOP and (3mm × 2mm) DFN Packages

of 0.7μA. A power good ﬂag signals when V

reaches

OUT

90% of the programmed output voltage. The LT3990 is

available in small 10-pin MSOP and 3mm × 2mm 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

5V Step-Down Converter

Efﬁciency

= 12V

6V TO 60V

0.22μF

BOOST

LT3990

22μH

22pF

OUT

OFF ON

350mA

22μF

2.2μF

GND

316k

226k

f = 600kHz

3990 TA01a

0.01

0.1

100

LOAD CURRENT (mA)

3990 TA01b

3990p

12 3 4 5 6 7...20

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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