Datasheet > L4957AD-3.3

L4957AD-3.3

更新时间： 2024-11-14 12:01:47

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
12页	134K
描述
Up to 5A ULDO linear regulator

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L4957AD-3.3 数据手册

L4957A

Up to 5A ULDO linear regulator

General features

■ 1.5V, 1.8V, 2.5V and 3.3V fixed output voltage

■ 3V to 14V input voltage range

■ 200mΩ R

typical @ t = 125°C

DS(on)

■ 0.6V max. drop-out at 2A

■ Excellent load regulation

■ 0.6mA quiescent current at any load

■ Short circuit protection

D PAK

Description

The L4957AD devices are Ultra Low Drop Output

linear regulators with an internal N-channel

MOSFET of 200mΩ particulary suitable for low

voltage/low dropout applications.

■ Thermal shutdown

Applications

■ Mother boards

Operating with a input voltage from 3V to 14V

they are capable to deliver up to 5A.

■ Processor I/O & supplies

■ Low voltage memory & chip set supplies

■ Graphic & sound cards

■ Low voltage logic supplies

■ Post regulator for SMPS

The devices are ideal for use as one of the

suppliesrequired by processor, for example they

are the cost effective and efficient solution for

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

to 1.5V with high current rating.

Fast response transient minimise the output

capacitor value. A minimum of 22µF assures the

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

controlled short circuit current. Thermal shutdown

provides protection against overload conditions

that creates excessive junction temperature.

Order codes

Part number

Tube

Tape and Reel

L4957AD1.5

L4957AD1.8

L4957AD2.5

L4957AD3.3

L4957AD1.5TR

L4957AD1.8TR

L4957AD2.5TR

L4957AD3.3TR

April 2006

Rev 6

1/12

www.st.com

12 3 4 5 6 7...12

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