FP6276B

This datasheet contains new product information.

Feeling Technology reserves the rights to modify the product specification without notice.

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Rev. 0.66

9/12

Application Information

Inductor Selection

Inductance value is decided based on different condition. 1.5uH to 4.7µH inductor value is

recommended for general application circuit. There are three important inductor specifications, DC

resistance, saturation current and core loss. Low DC resistance has better power efficiency.

Also,

avoid inductor saturation which will cause circuit system unstable and lower core loss at 500KHz.

Capacitor Selection

The output capacitor is required to maintain the VO DC voltage. Low ESR capacitors are

preferred to reduce the output voltage ripple. Ceramic capacitor of X5R and X7R are recommended,

which have low equivalent series resistance (ESR) and wider operation temperature range.

Output Voltage Programming

The output voltage is set by a resistive voltage divider from the output voltage to FB. The output

voltage is:











 



2

R

1

R

1

V

6

.

0

V

OUT

Layout Considerations

1.

short, direct and wide.

2.

Layout LX switching node wide and short trace to reduce EMI.

3.

Place C1 near VIN pin as closely as possible to maintain input voltage steady and filter out

the pulsing input current.

4.

The resistive divider R1 and R2 must be connected to FB pin directly and as closely as

possible.

5.

FB is a sensitive node. Please keep it away from switching node LX.

6.

The GND of the IC, C1, C3 and C4 should be connected close together directly to a power

ground plane.