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LM2671 Datasheet(PDF) 25 Page - Texas Instruments

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Part No. LM2671
Description  LM2671 SIMPLE SWITCHER짰 Power Converter High Efficiency 500-mA Step-Down Voltage Regulator With Features
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
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LM2671 Datasheet(HTML) 25 Page - Texas Instruments

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LM2671
www.ti.com
SNVS008L – SEPTEMBER 1998 – REVISED JUNE 2016
Product Folder Links: LM2671
Submit Documentation Feedback
Copyright © 1998–2016, Texas Instruments Incorporated
Figure 22. RMS Current Ratings for Low ESR Electrolytic Capacitors (Typical)
For a through-hole design, a 68-μF, 35-V electrolytic capacitor (Panasonic HFQ series, Nichicon PL, Sanyo MV-
GX series or equivalent) would be adequate. Other types or other manufacturers' capacitors can be used
provided the RMS ripple current ratings are adequate. Additionally, for a complete surface mount design,
electrolytic capacitors such as the Sanyo CV-C or CV-BS and the Nichicon WF or UR and the NIC Components
NACZ series could be considered.
For surface mount designs, solid tantalum capacitors can be used, but caution must be exercised with regard to
the capacitor surge current rating and voltage rating. In this example, checking the Sprague 594D series data
sheet, a Sprague 594D 15-μF, 50-V capacitor is adequate.
9.2.2.2.6
Boost Capacitor (CB)
This capacitor develops the necessary voltage to turn the switch gate on fully. All applications must use a
0.01-μF, 50-V ceramic capacitor. For this application, and all applications, use a 0.01-μF, 50-V ceramic capacitor.
If the soft-start and frequency synchronization features are desired, look at steps 6 and 7 in Detailed Design
Procedure.


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