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LM2671M-3.3 Datenblatt(PDF) 10 Page - Texas Instruments

Teilenummer LM2671M-3.3
Bauteilbeschribung  LM2671 SIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage
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LM2671M-3.3 Datenblatt(HTML) 10 Page - Texas Instruments

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LM2671
SNVS008K – SEPTEMBER 1998 – REVISED APRIL 2013
www.ti.com
TEST CIRCUIT AND LAYOUT GUIDELINES
CIN - 22 μF, 50V Tantalum, Sprague “199D Series”
COUT - 47 μF, 25V Tantalum, Sprague “595D Series”
D1 - 3.3A, 50V Schottky Rectifier, IR 30WQ05F
L1 - 68
μH Sumida #RCR110D-680L
CB - 0.01 μF, 50V Ceramic
Figure 22. Standard Test Circuits and Layout Guides
Fixed Output Voltage Versions
CIN - 22 μF, 50V Tantalum, Sprague “199D Series”
COUT - 47 μF, 25V Tantalum, Sprague “595D Series”
D1 - 3.3A, 50V Schottky Rectifier, IR 30WQ05F
L1 - 68
μH Sumida #RCR110D-680L
R1 - 1.5 k
Ω, 1%
CB - 0.01 μF, 50V Ceramic
For a 5V output, select R2 to be 4.75 k
Ω, 1%
where VREF = 1.21V
Use a 1% resistor for best stability.
Figure 23. Standard Test Circuits and Layout Guides
Adjustable Output Voltage Versions
Application Hints
The LM2671 provides all of the active functions required for a step-down (buck) switching regulator. The internal
power switch is a DMOS power MOSFET to provide power supply designs with high current capability, up to
0.5A, and highly efficient operation.
10
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Product Folder Links: LM2671


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