Datasheet > LT1676I

LT1676I

更新时间： 2024-11-20 22:51:47

品牌	Logo	应用领域
凌特 - Linear		稳压器开关
页数	文件大小	规格书
16页	139K
描述
Wide Input Range, High Efficiency, Step-Down Switching Regulator

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数据手册

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LT1676I 数据手册

LT1676

Wid e Inp ut Ra ng e ,

Hig h Effic ie nc y, Ste p -Do wn

Switc hing Re g ula to r

FEATURES

DESCRIPTIO

The LT^®1676 is a wide input range, high efficiency Buck

(step-down) switching regulator. The monolithic die in-

cludes all oscillator, control and protection circuitry. The

part can accept input voltages as high as 60V and contains

an output switch rated at 700mA peak current. Current

mode control offers excellent dynamic input supply rejec-

tion and short-circuit protection.

■

Wide Input Range: 7.4V to 60V

700mA Peak Switch Current Rating

Adaptive Switch Drive Maintains Efficiency at High

Load Without Pulse Skipping at Light Load

True Current Mode Control

100kHz Fixed Operating Frequency

Synchronizable to 250kHz

Low Supply Current in Shutdown: 30µA

■

The LT1676 contains several features to enhance effi-

ciency. The internal control circuitry is normally powered

via the V_CCpin, thereby minimizing power drawn directly

■

Available in 8-Pin SO and PDIP Packages

from the V supply (see Applications Information). The

APPLICATIO S

■

action of the LT1676 switch circuitry is also load depen-

dent. At medium to high loads, the output switch circuitry

maintains highrisetimeforgoodefficiency. Atlightloads,

rise time is deliberately reduced to avoid pulse skipping

behavior.

Automotive DC/DC Converters

Telecom 48V Step-Down Converters

Cellular Phone Battery Charger Accessories

IEEE 1394 Step-Down Converters

■

The available SO-8 package and 100kHz switching fre-

quency allow for minimal PC board area requirements.

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

TYPICAL APPLICATIO

Efficiency vs V and I_LOAD

8V TO 50V

SHDN

220µH*

400mA

36.5k

39µF

63V

100µF

10V

MBR160

LT1676

SYNC

2200pF

= 12V

= 24V

12.1k

100pF

22k

GND

= 36V

= 48V

1676 F01

*65T #30 ON MAGNETICS

MPP #55030

100

1000

(mA)

LOAD

1676 TA01

Figure 1

12 3 4 5 6 7...16

中文翻译

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