Figure 20. Additional Application Diagram, -9.0 V to -28 V Input,

-5.0 V/700 mA Output Inverted Buck Converter

3255

FB (2)

PGND (7)

2.2 µF

15 µH

GND

300

GND

5.0 k

0.01µF

200 pF

-5.0

1.1 k

22 µF

Low

ESR

Figure 22. Additional Application Diagram, 4.0 V Input, 100 V/ 10 mA Output Boost

Converter with Output Voltage Multiplier

VC

FB

AGND

PGND

VSW

GND

GND

0.01µ

VCC

4.0 V

Test

SS

1

2

3

4

8

7

6

5

C11

R1

R2

R3

C10

0.1µ

C8

C9

C1

C2

C3

C4

C5

C6

C7

50 V

50 V

50 V

50 V

50 V

50 V

50 V

D1

D1

D1

D1

D1

D1

D1

1N4148

99.755k / 0.1 W, 1%

1.245 k / 0.1 W, 1%

2.0 k

0.1µ

10

100 VO

µ

1N4148 1N4148 1N4148

1N4148 1N4148 1N4148

Figure 21. Additional Application Diagram, 2.7 V to 28 V Input, 5.0 V Output

SEPIC Converter

3255

+

+

FB (2)

AGND (6)

PGND (7)

22

GND

GND

5.0 k

0.01µF

200 pF

22 µH

Low

ESR

22 µF

22

22

37.24 k

5.0 V

µF

µF

µF

0.1µ

0.1µ

0.1µ

0.1µ

0.1µ

0.1µ

0.1µ

FC3255 1.5A PWM Switching Regulators