Diodes AP5002 Manuel d'utilisateur télécharger pdf (Page 5)

AP5002

PWM CONTROL 2A STEP-DOWN CONVERTER

AP5002 Rev. 8 5 of 10 FEBRUARY 2009

www.diodes.com © Diodes Incorporated

Typical Application Circuit

U1

AP5002

1

2

3

4 5

6

7

8

FB

EN

COMP

VCC Output

Output

VSS

VSS

C8

0.1uF

C3

0.1uF

C6

0.1uF

C7

0.1uF

C1

330pF

C4

22uF

D1

Dii 723

B340A

L1-(WURTH S05100104)

10uH

1 2

R4

0.8~2K

R1

3.8K

VIN+12V

R2

1.2K

R5

100K

VOUT = 3.3V

C2

22uF

ON/OFF

Compensation Capacitor Selection(MLCC)

VIN VOUT R4 C7

C1

12V 5/ 3.3/ 2.5/ 1.8/ 1.5V 0.8~2K 0.1µF

330pF

5V 3.3/ 2.5/ 1.8/ 1.5V 0.8~2K 27nF

330pF

VOUT = 3.3V

10uH

1

2

R1

3.8K

ON/OFF

U1

AP5002

1

2

3

4

5

6

7

8

FB

EN

COMP

VCC

Output

Output

VSS

VSS

R4

4.7~6.8K

C3

0.1uF

C8

0.1uF

C6

0.1uF

C7

33nF

C1

330pF

C4

470uF

D1

B340A

VIN+12V

R2

1.2K

R5

100K

C2

470uF

Dii 723

L1-(WURTH S05100104)

Notes: 4. V

OUT

= V

FB

)

R2

R1

(1 +×

1 2 3 4 5 6 7 8 9 10

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