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LM2576SX-3.3 Datasheet(PDF) 11 Page - Texas Instruments

No. de pieza LM2576SX-3.3
Descripción Electrónicos  SIMPLE SWITCHER짰 3A Step-Down Voltage Regulator
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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LM2576SX-3.3 Datasheet(HTML) 11 Page - Texas Instruments

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LM2576, LM2576HV
www.ti.com
SNVS107C – JUNE 1999 – REVISED APRIL 2013
TEST CIRCUIT AND LAYOUT GUIDELINES
As in any switching regulator, layout is very important. Rapidly 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 construction should be used for best results. When using the Adjustable version,
physically locate the programming resistors near the regulator, to keep the sensitive feedback wiring short.
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%
Figure 21. Fixed Output Voltage Versions
where
VREF = 1.23V, R1 between 1k and 5k
Figure 22. Adjustable Output Voltage Version
Copyright © 1999–2013, Texas Instruments Incorporated
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Product Folder Links: LM2576 LM2576HV


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