LM2576S-3.3 datasheet(10/24 Pages) NSC

Part #	LM2576S-3.3

Description	SIMPLE SWITCHER 3A Step-Down Voltage Regulator

Download	24 Pages

Scroll/Zoom	100%

Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

Logo

10 / 24 page

Test Circuit and Layout Guidelines

As in any switching regulator, layout is very important. Rap-

idly switching currents associated with wiring inductance

generate voltage transients which can cause problems. For

minimal inductance and ground loops, the length of the leads

indicated by heavy lines should be kept as short as possible.

Single-point grounding (as indicated) or ground plane con-

struction should be used for best results. When using the

Adjustable version, physically locate the programming resis-

tors near the regulator, to keep the sensitive feedback wiring

short.

Fixed Output Voltage Versions

01147607

CIN — 100 µF, 75V, Aluminum Electrolytic

COUT — 1000 µF, 25V, Aluminum Electrolytic

D1 — Schottky, MBR360

L1 — 100 µH, Pulse Eng. PE-92108

R1 — 2k, 0.1%

R2 — 6.12k, 0.1%

Adjustable Output Voltage Version

01147608

where VREF = 1.23V, R1 between 1k and 5k.

FIGURE 2.

www.national.com

10

Similar Part No. - LM2576S-3.3

Manufacturer	Part #	Datasheet	Description
Semtech Corporation	LM2576S-3.3	441Kb / 19P	1A & 3A Miniconverter Switching Regulators
Texas Instruments	LM2576S-3.3	3Mb / 37P	[Old version datasheet] LM2576/LM2576HV Series SIMPLE SWITCHER짰 3A Step-Down Voltage Regulator
Texas Instruments	LM2576S-3.3	3Mb / 37P	[Old version datasheet] SIMPLE SWITCHER짰 3A Step-Down Voltage Regulator
ARTSCHIP ELECTRONICS CO...	LM2576S-3.3	1Mb / 23P	SIMPLE SWITCHER 3A Step-Down Voltage Regulator
Guangdong Youtai Semico...	LM2576S-3.3	2Mb / 10P	IC REG BUCK 3A TO263-5L

Manufacturer	Part #	Datasheet	Description
SeCoS Halbleitertechnol...	S5ELM2576	967Kb / 8P	Simple Switcher 3A Step-Down Voltage Regulator
Cystech Electonics Corp...	PL2576-XXXF5	223Kb / 10P	Simple Switcher 3A Step- Down Voltage Regulator
List of Unclassifed Man...	AE2576	569Kb / 11P	SIMPLE SWITCHER 3A Step-Down Voltage Regulator Jan.2010 V1.2
Cystech Electonics Corp...	LM2576-XXE5	340Kb / 12P	Simple Switcher 3A Step- Down Voltage Regulator
SeCoS Halbleitertechnol...	S5ULM2576	998Kb / 8P	Simple Switcher 3A Step-Down Voltage Regulator
GTM CORPORATION	G5ELM2576	358Kb / 7P	Simple Switcher 3A Step-Down Voltage Regulator
GTM CORPORATION	G5ULM2576	356Kb / 7P	Simple Switcher 3A Step-Down Voltage Regulator
ARTSCHIP ELECTRONICS CO...	LM2576	1Mb / 23P	SIMPLE SWITCHER 3A Step-Down Voltage Regulator
Wuxi Youda electronics ...	YD2576	84Kb / 3P	SIMPLE SWITCHER 3A STEP-DOWN VOLTAGE
National Semiconductor ...	LM2676	350Kb / 25P	SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator