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LM2594N-ADJ データシート(PDF) 10 Page - Texas Instruments

部品番号 LM2594N-ADJ
部品情報  LM2594/LM2594HV SIMPLE SWITCHER짰 Power Converter 150 kHz 0.5A Step-Down Voltage Regulator
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ホームページ  http://www.ti.com
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LM2594N-ADJ データシート(HTML) 10 Page - Texas Instruments

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LM2594, LM2594HV
SNVS118C – DECEMBER 1999 – REVISED APRIL 2013
www.ti.com
TYPICAL CIRCUIT AND LAYOUT GUIDELINES
Fixed Output Voltage Versions
CIN — 68 μF, 35V, Aluminum Electrolytic Nichicon “PL Series”
COUT — 120 μF, 25V Aluminum Electrolytic, Nichicon “PL Series”
D1 — 1A, 40V Schottky Rectifier, 1N5819
L1 — 100
μH, L20
Select components with higher voltage ratings for designs using the LM2594HV with an input voltage between
40V and 60V.
Adjustable Output Voltage Versions
CIN — 68 μF, 35V, Aluminum Electrolytic Nichicon “PL Series”
COUT — 120 μF, 25V Aluminum Electrolytic, Nichicon “PL Series”
D1 — 1A, 40V Schottky Rectifier, 1N5819
L1 — 100
μH, L20
R1 — 1 kΩ, 1%
CFF — See Application Information Section
Figure 20. Typical Circuits and Layout Guides
As in any switching regulator, layout is very important. Rapidly switching currents associated with wiring
inductance can generate voltage transients which can cause problems. For minimal inductance and ground
loops, the wires indicated by heavy lines should be wide printed circuit traces and should be kept as short
as possible. For best results, external components should be located as close to the switcher lC as possible
using ground plane construction or single point grounding.
If open core inductors are used, special care must be taken as to the location and positioning of this type of
inductor. Allowing the inductor flux to intersect sensitive feedback, lC groundpath and COUT wiring can cause
problems.
10
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Copyright © 1999–2013, Texas Instruments Incorporated
Product Folder Links: LM2594 LM2594HV


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