Datasheet > L4973V3.3-L4973V5.1

L4973V3.3-L4973V5.1

更新时间： 2024-09-14 22:14:55

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		稳压器开关
页数	文件大小	规格书
16页	224K
描述
3.5A STEP DOWN SWITCHING REGULATOR

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中文翻译

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数据手册

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L4973V3.3-L4973V5.1 数据手册

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L4973V3.3 - L4973V5.1

L4973D3.3 - L4973D5.1

3.5A STEP DOWN SWITCHING REGULATOR

UPTO 3.5ASTEPDOWNCONVERTER

OPERATING INPUT VOLTAGE FROM 8V TO

55V

MULTIPOWER BCD TECHNOLOGY

3.3V AND 5.1V (±1%) FIXED OUTPUT, AND

ADJUSTABLE OUTPUTS FROM:

0V TO 50V (3.3V type)

5.1V TO 50V (5.1 type)

FREQUENCY ADJUSTABLE UP TO 300KHz

VOLTAGEFEED FORWARD

ZERO LOAD CURRENT OPERATION (min

1mA)

INTERNAL CURRENT LIMITING (PULSE BY

PULSE AND HICCUPMODE)

POWERDIP (12+3+3)

SO20(12+4+4)

ORDERING NUMBERS:

L4973V3.3 (Powerdip)

L4973D3.3 (SO20)

L4973V5.1 (Powerdip)

L4973D5.1 (SO20)

PRECISE 5.1V (1.5%) REFERENCE VOLT-

AGE EXTERNALLY AVAILABLE

INPUT/OUTPUT SYNCHRONIZATION FUNC-

TION

INHIBIT FOR ZERO CURRENT CONSUMP-

TION (100µA Typ. at V_CC= 24V)

PROTECTION AGAINST FEEDBACK DIS-

CONNECTION

THERMAL SHUTDOWN

OUTPUT OVERVOLTAGEPROTECTION

SOFT START FUNCTION

DESCRIPTION

The L4973 is a step down monolithic power

switching regulator delivering 3.5A at fixed volt-

ages of 3.3V or 5.1V and using a simple external

divider output adjustable voltage up to 50V.

Realized in BCD mixed technology, the device

TYPICAL APPLICATION CIRCUIT (POWERDIP)

V_CC(8V to 55V)

C_BOOT

R_OSC

L4973

V_O(3.3V or 5.1V)

C_IN

4,5,6,

13,14,15 16

R_COMP

C_OSC

C_SS

C_OUT

C_COMP

D97IN554A

1/16

April 2000

12 3 4 5 6 7...16

中文翻译

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