Datasheet > L4957D25

L4957D25

更新时间： 2024-11-13 22:17:35

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		稳压器
页数	文件大小	规格书
7页	65K
描述
UP TO 4A ULDO LINEAR REGULATOR

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L4957D25 数据手册

L4957

UP TO 4A ULDO LINEAR REGULATOR

1.5V AND 2.5V FIXED OUTPUT VOLTAGE

3V TO 6.5V INPUT VOLTAGE RANGE

MULTIPOWER BCD TECHNOLOGY

200m Rdson TYPICAL @ T^j= 125°C

Ω

0.6V max. DROP-OUT AT 2A

EXCELLENTLOAD REGULATION

0.6mAQUIESCENT CURRENT AT ANY LOAD

SHORT CIRCUIT PROTECTION WITH FOLD-

BACK

THERMAL SHUTDOWN

Versawatt TO-220

D²PAK

ORDERING NUMBERS:

APPLICATIONS

L4957V1.5

L4957V2.5

L4957D1.5

L4957D2.5

MOTHER BOARDS

PROCESSORI/O & SUPPLIES

LOW VOLTAGE MEMORY & CHIP SET SUP-

PLIES

GRAPHIC & SOUND CARDS

LOW VOLTAGE LOGIC SUPPLIES

POSTREGULATOR FOR SMPS

The devices are ideal for use as one of the sup-

plies required by processor, for example they are

the cost effective and efficient solution for conver-

sion from 3.3V (rail bus) to 2.5V @ 2.5A or to

1.5V with high current rating.

Fast response transient minimise the output ca-

DESCRIPTION

pacitor value. A minimum of 22 F assures the

The L4957 devices are Ultra Low Drop Output lin-

ear regulators with an internal N-channel MOS of

200mΩ particulary suitable for low voltage/low

dropout applications.

stability in all load conditions.

The on-chip trimming technique offers a tighter

voltage reference tolerance (with ± 2% including

line and load variation) beside to ensure a con-

trolled short circuit current. Thermal shutdown

provides protection against overload conditions

that creates excessive junction temperature.

Operating with a input voltage from 3V to 6.5V

they are capable to deliver up to 4A at 1.5V or

2.5V fixed output voltages.

TYPICAL APPLICATION

_OUT=1.5V/2.5V

3V to 6.5V

OUT

L4957

GND

D97IN657E

1/7

February 2000

12 3 4 5 6 7

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