Datasheet > L4955V5.1

L4955V5.1

更新时间： 2024-11-13 22:18:59

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
14页	144K
描述
5A ULDO LINEAR REGULATORS FAMILY

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中文翻译

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L4955V5.1 数据手册

L4955

5A ULDO LINEAR REGULATORS FAMILY

UP TO 5A OUTPUT CURRENT

2% PRECISE OUTPUT VOLTAGES

MULTIPOWER BCD TECHNOLOGY

FAST TRANSIENT RESPONSE

0.75V TYP. DROP OUT VOLTAGEAT 5A

OPERATING INPUT VOLTAGEFROM 4.5V

ADJUSTABLE VERSION:

• V_O= 1.26V

• INHIBIT (I_Q= 120µA TYP.)

HEPTAWATT

VERSAWATT

(TO-220)

POWER GOOD

PROGRAMMABLECURRENT LIMIT

•

OUTPUT

VOLTAGE

• HEPTAWATT PACKAGE

FIXED VERSION:

ORDERING

NUMBERS

PACKAGE

• 3.3V, 5.1V OUTPUTS

L4955

1.26V ADJ

3.3V

HEPTAWATT

VERSAWATT

VERSAWATT PACKAGE

•

L4955V3.3

L4955V5.1

VERYLOW QUIESCENT CURRENT

SHORT CIRCUIT PROTECTION (Foldback

function)

5.1V

The dropout voltage is only 0.75V (Typ.) at 5A, di-

rectly dependenton the output current conditions.

THERMAL SHUTDOWN

Realized in BCDII technology, it has on board a

charge pump to properly drive an N-channel

APPLICATIONS

PENTIUM AND POWER PC SUPPLIES

power mos Transistor with 150m of R

Ω

DSON

POSTREGULATOR FOR SMPS

LOW COST SOLUTION FOR 5V TO 3.3V

CONVERSION

It operates from a 4.5V minimum supply, with a

very low quiescent current irrespective of the

load; a minimum of 22µF output capacitor is re-

quired for stability.

LOW COST BATTERY CHARGER

CONSTANT CURRENT REGULATOR

The on-chip trimming techniques improve the pre-

SUITABLE

FOR

APPLICATION WITH

cision of the available output voltages to 2%.

STANDBY FEATURE

Ancillary functions like power good, inhibit with

low power consumption, programmable output

voltage and current limiting make the flexible

heptawatt version usable in applications where

power management, stand-by, features, post

regulation and adjustable current generators for

battery chargers are important.

DESCRIPTION

The L4955 is a family of monolithic ultra very low

drop linear regulators designed to supply the

most recent microprocessors.

TYPICAL APPLICATIONS

INH

OUT

ADJ

OUT

V_IN

V_OUT

V_IN

V_OUT

L4955

L4955VXXX

GND

D97IN590

D97IN589

1/14

February 1999

12 3 4 5 6 7...14

中文翻译

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