RT9201

2

DS9201-12 August 2007

www.richtek.com

Typical Application Circuit

Recommended using lower ESR capacitor

F2

F2

F1

OUT

R

R

R

0.8

V

+

×

=

(V)

(V)

(

Ω)

(pF)

(

Ω)

(pF)

(

µH)

(pF)

(uF)

(uF)

0.85

2.5 to 4.0

24k

330

390k

10

4.7

330

10

22 or (10 x 2)

1.375

2.5 to 5.0

280k

33

390k

10

4.7

330

10

22 or (10 x 2)

1.5

2.5 to 5.5

343k

22

390k

10

6.8

470

10

22 or (10 x 2)

1.8

2.5 to 5.5

487k

15

390k

10

6.8

470

10

22 or (10 x 2)

2.5

3.5 to 5.5

820k

10

390k

10

10

680

10

22 or (10 x 2)

3.3

4.5 to 5.5

1.2M

5.6

390k

10

10

1000

10

22 or (10 x 2)

Recommended component selection for typical application circuit.

Component

Supplier

Series

Inductance (

µH)

ESR (m

Ω)

Current Rating (mA)

Dimensions (mm)

SH4018

4.7

6.8

10

82

100

150

1500

1150

1000

4.8x4.8x1.8

ABC

SR0302

4.7

6.8

10

150

180

250

1200

1000

800

3x2.8x2.5

TDK

SLF6028

4.7

6.8

10

28

35

53

1600

1500

1300

6x6x2.8

Coilcraft

DO1606

4.7

6.8

10

150

200

300

1100

1000

900

6.5x5.23x2

Suggested Inductors

PVDD

VDD

GND

LX

FB

SS

PGND

RT9201

8

7

3

2

6

5, Exposed Pad (11)

9

1

EN

GPIO