LM2679-5.0EVAL National Semiconductor, LM2679-5.0EVAL Datasheet - Page 3

• Manufacturer Part Number: LM2679-5.0EVAL
• Description: EVALUATION BOARD FOR LM2679-5.0
• Manufacturer: National Semiconductor
• Series: SIMPLE SWITCHER®r

Specifications of LM2679-5.0EVAL

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 5V
• Current - Output: 5A
• Voltage - Input: 14 ~ 28V
• Regulator Topology: Buck
• Frequency - Switching: 260kHz
• Board Type: Fully Populated
• Utilized Ic / Part: LM2679
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: *LM2679-5.0EVAL; LM2679-5.0-EVAL; LM2679-5.0-EVAL

Special Notes
The evaluation board was designed primarily for circuit im-
plementation using all surface-mount components. The small
series "trace inductance", particularly from the Switch Output
pin, can create a high frequency (10's of MHz) ringing signal
at the switch output. If problematic, this ringing can be re-
duced or eliminated by the use of a series RC damper or
FIGURE 3. Bottom Layer Foil Pattern of Printed Circuit Board
FIGURE 4. Silkscreen Image of Printed Circuit Board
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snubber network from the switch output to ground. The addi-
tion of these components is made at the locations labeled CD
and RD. Values of 0.01 µF and 10Ω are good starting values
that may need to be varied depending on the magnitude of
parasitic factors in a given design. In an actual end applica-
tion, these components are normally not required if proper
care to minimize trace lengths is taken in the PCB design.
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