L4973D3 datasheet(1/16 Pages) STMICROELECTRONICS

Teilenummer	L4973D3

Bauteilbeschribung	3.5A STEP DOWN SWITCHING REGULATOR

PDF	16 Pages

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Hersteller	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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L4973V3.3 - L4973V5.1

L4973D3.3 - L4973D5.1

3.5A STEP DOWN SWITCHING REGULATOR

UPTO 3.5ASTEP DOWN CONVERTER

OPERATING INPUT VOLTAGE FROM 8V TO

55V

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

VOLTAGE FEED FORWARD

ZERO LOAD CURRENT OPERATION (min

1mA)

INTERNAL CURRENT LIMITING (PULSE BY

PULSE AND HICCUP MODE)

PRECISE 5.1V (1.5%) REFERENCE VOLT-

AGE EXTERNALLY AVAILABLE

INPUT/OUTPUT SYNCHRONIZATION FUNC-

TION

INHIBIT FOR ZERO CURRENT CONSUMP-

TION (100

µA Typ. at VCC = 24V)

PROTECTION AGAINST FEEDBACK DIS-

CONNECTION

THERMAL SHUTDOWN

OUTPUT OVERVOLTAGE PROTECTION

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

April 2000

®

L4973

V

CC (8V to 55V)

C

IN

C2

ROSC

COSC

D1

L1

COUT

VO(3.3V or 5.1V)

CBOOT

4,5,6,

13,14,15

7

9

8

1

11

3

10

D97IN554A

17

RCOMP

CCOMP

CSS

2

16

12

TYPICAL APPLICATION CIRCUIT (POWERDIP)

POWERDIP (12+3+3)

SO20(12+4+4)

ORDERING NUMBERS:

L4973V3.3 (Powerdip)

L4973D3.3

(SO20)

L4973V5.1 (Powerdip)

L4973D5.1

(SO20)

MULTIPOWER BCD TECHNOLOGY

1/16

Ähnliche Beschreibung - L4973D3

Hersteller	Teilenummer	Datenblatt	Bauteilbeschribung
STMicroelectronics	L4973	367Kb / 27P	3.5A step down switching regulator 07-May-2007
Linear Technology	LT1913	292Kb / 24P	25V, 3.5A, 2.4MHz Step-Down Switching Regulator
	LT3693	310Kb / 24P	36V, 3.5A, 2.4MHz Step-Down Switching Regulator
	LT3692	532Kb / 36P	Monolithic Dual Tracking 3.5A Step-Down Switching Regulator
	LT1913	290Kb / 24P	25V, 3.5A, 2.4MHz Step-Down Switching Regulator
	LT3693	313Kb / 24P	36V, 3.5A, 2.4MHz Step-Down Switching Regulator
	LT3692	604Kb / 36P	Monolithic Dual Tracking 3.5A Step-Down Switching Regulator
	LT3692A	729Kb / 42P	Monolithic Dual Tracking 3.5A Step-Down Switching Regulator
	LT8610AB	210Kb / 6P	42V, 3.5A Micropower Synchronous Step-Down Regulator
	LT3692A	729Kb / 42P	Monolithic Dual Tracking 3.5A Step-Down Switching Regulator

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