LM2671 datasheet(25/36 Pages) TI1 | LM2671 SIMPLE SWITCHER짰 Power Converter High Efficiency 500-mA Step-Down Voltage Regulator With Features

Part No.	LM2671

Description	LM2671 SIMPLE SWITCHER짰 Power Converter High Efficiency 500-mA Step-Down Voltage Regulator With Features

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LM2671

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SNVS008L – SEPTEMBER 1998 – REVISED JUNE 2016

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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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