LM27342MYEVAL National Semiconductor, LM27342MYEVAL Datasheet - Page 2

• Manufacturer Part Number: LM27342MYEVAL
• Description: Step-Down DC/DC Regulator Eval. Board
• Manufacturer: National Semiconductor

Specifications of LM27342MYEVAL

• Silicon Manufacturer: National
• Application Sub Type: Step Down Switching Regulator
• Kit Application Type: Power Management - Voltage Regulator
• Silicon Core Number: LM27342
• Kit Contents: Board, Doc

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OVER CURRENT PROTECTION
The evaluation board is configured with over-current protec-
tion. The inductor current is limited to 4.0A (max).
SYNCHRONIZATION
A SYNC pin has been provided on the evaluation board. This
pin can be used to synchronize the regulator to an external
clock or multiple evaluation boards can be synchronized to-
gether by connecting their SYNC pins together. Refer to the
LM27342 datasheet for complete information
ADJUSTING THE OUTPUT VOLTAGE
The output voltage is set using the following equation where
R2 is connected between the FB pin and GND, and R1 is
connected between V
Adjusting the output voltage will affect the performance of the
LM27342. In addition, output capacitors might not be rated for
the new output voltage. Refer to the LM27342 datasheet for
more information.
Performance Characteristics
EFFICIENCY PLOTS
Figure 1 shows the conversion efficiency versus output cur-
rent for several input voltage conditions.
OUT
FIGURE 1.
and FB.
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2
TURN-ON WAVEFORM
When applying power to the LM27342 evaluation board a
soft-start sequence occurs. Figure 2 shows the output voltage
during a typical start-up sequence.
Output Current = 1A
FIGURE 2.
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