LM2679-5.0EVAL National Semiconductor, LM2679-5.0EVAL Datasheet - Page 2

• 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

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*All devices have internally preset current limits, but those with adjustable current limit capability can be used to set the current limit to any value up to the maximum
preset value.
CSYNC
COUTX
COUT
Label
CINX
CSS
CIN
R3*
U1
CB
D1
R1
R2
L1
FIGURE 2. Top Layer Foil Pattern of Printed Circuit Board
TABLE 2. List of Component Labels and Functionality
LM267X Switching Regulator IC
Input Capacitor(s); All devices.
0.47 µF, optional high frequency input bypass capacitor, recommended in all designs: All
devices.
Boost capacitor; All devices.
Catch diode; All devices.
Feedback resistor for adjustable output converters. This designator is left open (not
connected) for fixed output converters.
Feedback resistor (typ. 1 kΩ) for adjustable output converters. This designator is left
shorted (replaced by a jumper wire) for fixed output voltage converters.
Current limit resistor for LM2673, LM2679; Sync input resistor (1 kΩ) for LM2670 and
LM2677; Not inserted for LM2676 and LM2678.
Inductor; All devices.
Sync input capacitor (100 pF); LM2670 and LM2677only. Not inserted with other devices.
Soft start capacitor; LM2673 and LM2679 only. Not inserted with other devices.
0.47 µF, optional high frequency output bypass capacitor; All devices.
Output capacitor(s); All devices.
2
Function
10114502