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1 Layer Evaluation Board

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Notes

1. Ensure that the absolute maximum ratings of the external components and the XC9101 DC/DC IC itself are not exceeded.

2. We recommend that sufficient counter measures are put in place to eliminate the heat that may be generated by the external

N-ch MOSFET as a result of switching losses.

3. Try to use a N-ch MOSFET with as small a gate capacitance as possible in order to avoid overly large output spike voltages

that may occur (such spikes occur in proportion to gate capacitance).

4. The performance of the XC9101 DC/DC converter is greatly influenced by not only its own characteristics, but also by those of

the external components it is used with. We recommend that you refer to the specifications of each component to be used and

take sufficient care when selecting components.

5. Wire external components as close to the IC as possible and use thick, short connecting wires to reduce wiring impedance.

In particular, minimize the distance between the by-pass capacitor and the IC.

6. Make sure that the GND wiring is as strong as possible as variations in ground potential caused by ground current at the time

pin.

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NOTES ON USE (Continued)

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Instruction on Pattern Layout (Continued)

Power GND

IC GND

RFB1

CL

RFB2

CFB

CDD

L

N-MOS

1

2

3

4

5

6

7

8

SD

C_SS

R_SS

RSEN

C_GAIN

C_CLK

R_CLK

5

6

7

8