Copyright

© ANPEC Electronics Corp.

Rev. A.7 - Sep., 2010

APW7085

www.anpec.com.tw

14

Typical Application Circuits (Cont.)

4. +12V Single Power Input Step-down Converter (with Electrolytic Input/Output Capacitors)

R2

15K

1%

LX

EN

2

VIN

GND

COMP

6

U1

APW7085

FB

7

UGND

3

V

OUT

+3.3V/2A

L1

10

µH

2A

D1

VCC

4

C3

1

µF

C2

1

µF

V

IN

+12V

C1

2.2

µF

C5

1500pF

R4

39K

C6

22pF

C4

470

µF

R1

47K

1%

R3

100k

Ω

V

IN

C8

470

µF

C7

39pF

5

(ESR=30m

Ω)

5. -8V Inverting Converter with 4.5~5.5V Single Power Input

LX

EN

2

VIN

GND

COMP

6

U1

APW7085

UGND

3

L1

10

µH

2A

D1

VCC

4

C3

1

µF

C2

1

µF

V

IN

4.5~5.5V

C1

10

µF

C5

560pF

R4

68k

Ω

C6

22pF

C4

22

µF

R3

100k

Ω

5

R2

10k

Ω

FB

7

R1

90.9k

C7

22pF

PGND

AGND

V

OUT

-8V/2A

C8

1

µF