Copyright

© ANPEC Electronics Corp.

Rev. A.6 - Jun., 2008

APW7080

www.anpec.com.tw

13

3. 4.5~5.5V Single Power Input Step-down Converter

Typical Application Circuit (Cont.)

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

R2

1%

LX

EN

2

VIN

GND

COMP

6

9

U1

APW7080

FB

7

UGND

3

V

OUT

0.8V~90%V

IN

/4A

L1

4A

D1

VCC

4

C3

1

µF

C2

1

µF

V

IN

4.5~5.5V

C1

10

µF

C5

R4

C6

C4

22

µF

R1

1%

C7

(Optional)

R5

100k

Ω

V

IN

LX

5

R2

15k

1%

LX

EN

2

VIN

GND

COMP

6

9

U1

APW7080

FB

7

UGND

3

V

OUT

+3.3V/4A

L1

10uH

4A

D1

VCC

4

C3

1

µF

C2

1

µF

V

IN

+12V

C1

2.2

µF

C5

4700pF

R4

56k

C6

22pF

C4

470

µF

R1

46.9k

1%

R5

100k

Ω

V

IN

C8

470

µF

C7

33pF

LX

5

(ESR=30m

Ω)