MIC28303 datasheet(14/38 Pages) MICROCHIP

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MIC28303

DS20005464A-page 14

 2016 Microchip Technology Inc.

FIGURE 2-39:

Enable Turn-On Delay and

Rise Time.

FIGURE 2-40:

Enable Turn-Off Delay and

Fall Time.

FIGURE 2-41:

MIC28303-2 VIN Start-Up

with Pre-Biased Output.

FIGURE 2-42:

MIC28303-1 VIN Start-Up

with Pre-Biased Output.

TABLE 2-2:

RECOMMENDED COMPONENT VALUES FOR 600 KHZ SWITCHING FREQUENCY

VOUT

VIN

(Rinj)

(Top

Feedback

Resistor)

R11

(Bottom

Feedback

Resistor)

R19

C10

(Cinj)

C12

(Cff)

COUT

0.9V

5V to 50V

16.5 kΩ

10 kΩ

80.6 kΩ

DNP

0.1 µF

2.2 nF

47 µF/6.3V

or 2 x 22 µF

1.2V

5V to 50V

16.5 kΩ

10 kΩ

20 kΩ

DNP

0.1 µF

2.2 nF

47 µF/6.3V

or 2 x 22 µF

1.8V

5V to 50V

16.5 kΩ

10 kΩ

8.06 kΩ

DNP

0.1 µF

2.2 nF

47 µF/6.3V

or 2 x 22 µF

2.5V

5V to 50V

16.5 kΩ

10 kΩ

4.75 kΩ

DNP

0.1 µF

2.2 nF

47 µF/6.3V

or 2 x 22 µF

3.3V

5V to 50V

16.5 kΩ

10 kΩ

3.24 kΩ

DNP

0.1 µF

2.2 nF

47 µF/6.3V

or 2 x 22 µF

7V to 50V

16.5 kΩ

10 kΩ

1.9 kΩ

DNP

0.1 µF

2.2 nF

47 µF/6.3V

or 2 x 22 µF

12V

18V to 50V 23.2 kΩ

10 kΩ

715 kΩ

DNP

0.1 µF

2.2 nF

47 µF/16V

or 2 x 22 µF

VIN = 12V

OUT = 5V

OUT = 3A

Time (2.0ms/div)

(2V/div)

OUT

(2V/div)

(10V/div)

VIN = 12V

OUT = 5V

OUT = 3A

Time (1.0ms/div)

(2V/div)

OUT

(2V/div)

(10V/div)

VIN = 12V

OUT = 5V

OUT = 0A

PRE-BIAS = 1.5V

Time (4.0ms/div)

VIN

(10V/div)

OUT

(2V/div)

(10V/div)

VIN = 12V

OUT = 5V

OUT = 0A

PRE-BIAS = 1.5V

Time (4.0ms/div)

VIN

(10V/div)

OUT

(2V/div)

(10V/div)

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