RT8009PJ5 datasheet(11/13 Pages) RICHTEK

Part #	RT8009PJ5

Description	1.25MHz, 600mA, High Efficiency PWM Step-Down DC/DC Converter

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Manufacturer	RICHTEK [Richtek Technology Corporation]

Direct Link	http://www.richtek.com

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11 / 13 page

RT8009

11

DS8009-03 March 2007

www.richtek.com

Figure 7. Top Layer

Figure 8. Bottom Layer

Component Supplier

Series

Inductance (uH) DCR (mΩ) Current Rating (mA) Dimensions (mm)

TAIYO YUDEN

NR 3015

2.2

60

1480

3x3x1.5

TAIYO YUDEN

NR 3015

4.7

120

1020

3x3x1.5

Sumida

CDRH2D14

2.2

75

1500

4.5x3.2x1.55

Sumida

CDRH2D14

4.7

135

1000

4.5x3.2x1.55

GOTREND

GT SD32

2.2

58

1500

3.85x3.85x1.8

GOTREND

GT SD32

4.7

146

1100

3.85x3.85x1.8

Table 1. Inductors

Component Supplier

Part No.

Capacitance (uF)

Case Size

TDK

C1608JB0J475M

4.7

0603

TDK

C2012JB0J106M

10

0805

MURATA

GRM188R60J475KE19

4.7

0603

MURATA

GRM219R60J106ME19

10

0805

MURATA

GRM219R60J106KE19

10

0805

TAIYO YUDEN

JMK107BJ475RA

4.7

0603

TAIYO YUDEN

JMK107BJ106MA

10

0603

TAIYO YUDEN

JMK212BJ106RD

10

0805

Table 2. Capacitors for CIN and COUT

Recommended component selection for Typical Application

Connect feedback network behind the output capacitors.

Keep the loop area small. Place the feedback

components near the RT8009.

Connect all analog grounds to a command node and

then connect the command node to the power ground

behind the output capacitors.

An example of 2-layer PCB layout is shown in Figure 7

and Figure 8 for reference.

LX

GND

RT8009

EN

FB

L1

C4

V

IN

V

OUT

C3

R1

R2

VIN

1

3

2

5

4

10uF

C1

C2

4.7uF

R3

4.7uH

Figure 6. EVB Schematic

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