 2016 Microchip Technology Inc.

DS20005464A-page 7

MIC28303

2.0

TYPICAL PERFORMANCE CURVES

FIGURE 2-1:

Efficiency vs. Output

Current (MIC28303-1).

FIGURE 2-2:

Efficiency vs. Output

Current (MIC28303-2).

FIGURE 2-3:

Thermal Derating

(MIC28303-2).

Note:

The graphs and tables provided following this note are a statistical summary based on a limited number of

samples and are provided for informational purposes only. The performance characteristics listed herein

are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified

operating range (e.g., outside specified power supply range) and therefore outside the warranted range.

TABLE 2-1:

RECOMMENDED COMPONENT VALUES FOR 275KHZ SWITCHING FREQUENCY

R3

R19

R15

R1

(Top

Feedback

Resistor)

R11

(Bottom

Feedback

Resistor)

C10

C12

5V

7V to 18V

16.5 kΩ

75 kΩ 3.57 kΩ

10 kΩ

1.9 kΩ

0.1 µF

2.2 nF

2 x 47 µF/6.3V

5V

18V to 50V 39.2 kΩ

75 kΩ 3.57 kΩ

10 kΩ

1.9 kΩ

0.1 µF

2.2 nF

2 x 47 µF/6.3V

3.3V

5V to 18V

16.5 kΩ

75 kΩ 3.57 kΩ

10 kΩ

3.24 kΩ

0.1 µF

2.2 nF

2 x 47 µF/6.3V

3.3V

18V to 50V 39.2 kΩ

75 kΩ 3.57 kΩ

10 kΩ

3.24 kΩ

0.1 µF

2.2 nF

2 x 47 µF/6.3V